What Does Testicular Cancer Look Like Visual Diagnostic Guide

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Testicular cancer often presents with subtle yet critical visual and tactile clues that distinguish it from benign conditions, demanding early recognition for optimal outcomes. While symptoms such as a painless lump or scrotal swelling may initially seem innocuous, their underlying pathology can vary dramatically—from harmless cysts to aggressive malignancies. Understanding the distinct physical, imaging, and microscopic characteristics of testicular cancer is essential for clinicians, radiologists, and patients alike to ensure timely intervention and improved survival rates.

The appearance of testicular cancer spans macroscopic abnormalities detectable through self-examination to microscopic cellular patterns identified under high magnification. From irregular hypoechoic masses on ultrasound to heterogeneous staining in histological slides, each diagnostic modality offers unique insights into tumor behavior and progression. This guide explores the full spectrum—from the first signs of a suspicious lesion to advanced metastatic imaging—providing a structured framework for accurate diagnosis and differential assessment.

what does testicular cancer look like

Visual Characteristics and Tactile Features of Testicular Masses

Testicular cancer often presents with distinct visual and tactile differences compared to benign conditions, such as hydroceles, varicoceles, or epididymal cysts. Early detection relies on recognizing subtle but critical variations in size, shape, texture, and associated symptoms. Malignant testicular masses typically exhibit irregular borders, increased hardness, and a lack of mobility, whereas benign lumps often appear smoother, softer, and more uniformly rounded. Understanding these distinctions is essential for prompt medical evaluation, as testicular cancer is highly treatable when identified in its early stages.

The following sections provide a detailed comparison of malignant versus benign testicular abnormalities, a structured breakdown of common symptoms, and a step-by-step guide for self-examination. Reliable sources, including clinical guidelines from the American Cancer Society, National Comprehensive Cancer Network (NCCN), and European Association of Urology (EAU), emphasize that 95% of testicular cancers originate in germ cells, with seminomas and nonseminomatous germ cell tumors (NSGCTs) being the most prevalent subtypes. Visual and tactile assessment remains a cornerstone of early diagnosis, particularly in the absence of advanced imaging.

Physical Appearance of Testicular Masses

Testicular cancer typically manifests as a painless, firm lump on or within the testicle, distinguishable from surrounding tissue. The following characteristics are commonly observed:

- Size and Shape:
Malignant masses often range from 1–5 cm in diameter but can grow larger if undetected. They may appear asymmetric or irregularly shaped, unlike benign cysts, which are usually smooth and round. For example, a seminoma may present as a homogeneous, solid mass, while a teratoma could exhibit heterogeneous textures due to calcifications or cystic components.

- Texture and Mobility:
Malignant lumps tend to be harder and less mobile than benign ones, often feeling fixed to the testicle or epididymis. In contrast, benign conditions like spermatic cord cysts or hydroceles usually feel soft, fluid-filled, and transilluminable (light passes through them). A varicocele (dilated veins) may appear as a bag of worms and collapse when lying down.

- Color and Translucency:
While not a definitive diagnostic feature, some malignant masses may appear darker or discolored due to hemorrhage or necrosis. Benign cysts, however, often retain a translucent or pale yellowish hue when illuminated. Hematospermia or blood in semen may accompany advanced cases but is not a primary visual indicator.

Key Differentiator:

"A malignant testicular mass is firm, painless, and fixed, whereas benign lumps are soft, mobile, and often transilluminable. Pain or tenderness suggests inflammation (e.g., epididymitis) rather than cancer."

Comparison of Benign vs. Malignant Testicular Lumps

The following table contrasts the visual and tactile characteristics of common benign and malignant testicular conditions, highlighting critical differences for self-assessment:
Feature Malignant Testicular Cancer Benign Conditions (Hydrocele, Cyst, Varicocele)
Size 1–5 cm or larger; grows rapidly if untreated. Varies (hydroceles may expand with standing; cysts remain small).
Shape Irregular, lobulated, or asymmetric. Round, smooth, and uniformly shaped.
Texture Hard, rubbery, or stony; may feel gritty (calcifications). Soft, fluid-filled (hydrocele), or spongy (varicocele).
Mobility Fixed to testicle or epididymis; does not move independently. Mobile (e.g., hydrocele shifts with position); may transilluminate.
Pain/Tenderness Usually painless; discomfort may occur if tumor presses on nerves. Painful if inflamed (e.g., epididymitis) or tender with pressure.
Associated Symptoms Swelling, heaviness, or dull ache; possible gynecomastia (breast enlargement). Swelling (hydrocele), dragging sensation (varicocele), or no symptoms (cyst).
Clinical Note:
"While 90% of testicular cancers are detected by patients or partners during self-examination, only 10% are benign. Any new lump or asymmetry warrants immediate medical evaluation, as delays reduce cure rates (5-year survival drops from 99% in Stage I to 74% in Stage III per SEER data)."

Common Symptoms of Testicular Abnormalities

Symptoms associated with testicular cancer or benign conditions often overlap, but their onset, progression, and accompanying signs can guide further investigation. The following table categorizes symptoms by their description, possible cause, and urgency for medical attention:
Symptom Description Possible Cause When to Seek Help
Swelling or Enlargement A gradual or sudden increase in testicle size, often unilateral. May feel like a "fullness" or tightness in the scrotum. Testicular cancer (malignant), hydrocele (benign fluid accumulation), or infection (epididymitis). Immediate evaluation if hard, painless, or accompanied by a lump; within 1–2 weeks if soft and painless.
Asymmetry One testicle appears visibly larger or lower than the other, even when lying down. May be subtle. Testicular mass (malignant), varicocele (benign), or post-surgical changes. Prompt assessment if new or progressive; routine check-ups for known varicoceles.
Skin Changes Redness, darkening, or thickening of the scrotal skin over the affected area. May resemble a "bruise" or rash. Infection (epididymitis), trauma, or hemorrhage in a malignant tumor (rare but possible). Urgent if painful or spreading; within 3–5 days if localized and non-painful.
Dull Ache or Heaviness A persistent, low-grade discomfort in the scrotum or lower abdomen, often worse with activity or standing. Testicular cancer (early stages), varicocele, or muscle strain. Evaluation if persists >2 weeks or worsens; imaging (ultrasound) recommended.
Sudden Pain Sharp, severe pain that may radiate to the groin or abdomen, often accompanied by fever or nausea. Torsion (medical emergency), epididymitis, or trauma. Emergency care within hours; torsion requires surgery within 6 hours to preserve fertility.
Breast Tenderness or GynecomastiaMedical Imaging and Diagnostic Appearance of Testicular Cancer Testicular cancer exhibits distinct radiographic and ultrasonographic features that enable early detection and differentiation from benign conditions such as hydroceles, epididymal cysts, or testicular torsion. Advanced imaging modalities, including ultrasound, MRI, and CT scans, provide critical insights into tumor morphology, vascularity, and metastatic spread. These diagnostic tools are complemented by serum tumor markers—alpha-fetoprotein (AFP), beta-human chorionic gonadotropin (β-hCG), and lactate dehydrogenase (LDH)—which correlate with tumor aggressiveness, histology, and prognosis. Radiologists integrate these findings to formulate precise reports that guide surgical intervention, chemotherapy, or surveillance strategies.

Ultrasound remains the first-line imaging modality for evaluating testicular masses due to its high sensitivity (95–100%) and specificity (85–98%) in distinguishing malignant from benign lesions. The appearance of testicular cancer on ultrasound is characterized by specific echogenicity patterns, vascular abnormalities, and architectural disruption, which are critical for diagnostic accuracy.

Ultrasound Characteristics of Testicular Cancer

Echogenicity and Internal Architecture
Testicular tumors typically present as hypoechoic (darker than surrounding testicular parenchyma) or hyperechoic (brighter) masses, though heterogeneity is common. Seminomas often appear as homogeneous hypoechoic lesions with well-defined borders, whereas nonseminomatous germ cell tumors (NSGCTs) frequently demonstrate heterogeneous echotexture with mixed hypo- and hyperechoic regions due to hemorrhage, necrosis, or calcification. The presence of microcalcifications (tiny bright echoes) or macrocalcifications (larger, shadowing structures) may suggest teratoma components or prior treatment effects.

Vascular Patterns
Color Doppler ultrasound reveals abnormal vascularity in malignant lesions, including:

  • Increased peripheral vascularity (often chaotic or "tumor blush" appearance).
  • Central vascularity (unlike benign lesions, which typically lack internal blood flow).
  • Arteriovenous shunting, where abnormal vessels create turbulent flow patterns.

    • Key Ultrasonographic Red Flags

  • Irregular borders with infiltration into the tunica albuginea.
  • Heterogeneous echotexture with cystic or solid components.
  • Reinke crystals (echogenic foci in Leydig cell tumors, though rare in germ cell tumors).
  • Hydrocele or hematocele adjacent to the mass, suggesting tumor rupture.
    • "A 2.8 cm heterogeneous hypoechoic mass in the left testis with irregular margins, internal vascularity on Doppler, and focal microcalcifications. The lesion displaces adjacent testicular parenchyma without clear demarcation, raising suspicion for a malignant germ cell tumor."

    MRI and CT Scan Findings in Testicular Cancer

    MRI Characteristics
    MRI provides superior soft-tissue contrast and is particularly useful for staging, evaluating tumor extension, and detecting retroperitoneal lymph node involvement. On T1-weighted images, testicular tumors may appear isointense or hypointense relative to normal testicular tissue, while T2-weighted images often show heterogeneous hyperintensity due to high water content in NSGCTs. Diffusion-weighted imaging (DWI) highlights restricted diffusion in malignant lesions, with high apparent diffusion coefficient (ADC) values in necrotic or cystic regions. Dynamic contrast-enhanced MRI demonstrates early and intense enhancement in seminomas, whereas NSGCTs may exhibit heterogeneous enhancement with areas of non-enhancement (necrosis).

    CT Scan Findings
    CT scans are less sensitive than MRI for primary testicular tumors but are invaluable for staging metastatic disease, particularly in the retroperitoneal lymph nodes, lungs, and liver. Key findings include:

  • Lymphadenopathy: Enlarged (>1 cm short-axis diameter) or necrotic lymph nodes in the para-aortic or iliac chains.
  • Metastatic deposits: Pulmonary nodules (often peripheral or subpleural) or hepatic lesions with irregular margins.
  • Tumor markers correlation: Elevated AFP or β-hCG on CT may indicate active disease in known primary tumors.

    • Comparison of MRI and CT for Staging

    FeatureMRICT Scan
    Primary Tumor EvaluationHigh-resolution images; detects microinvasion, tunica albuginea breach.Limited role; used primarily for staging post-ultrasound.
    Soft-Tissue ContrastSuperior; distinguishes tumor from surrounding structures (e.g., epididymis).Inferior; less detail in primary testicular anatomy.
    Lymph Node AssessmentBetter for small nodes (<5 mm); detects fat stranding or vascular invasion.Detects larger nodes (>1 cm); less sensitive for early metastasis.
    Metastatic WorkupUseful for bone marrow or brain metastases (if clinically indicated).Standard for chest/abdomen/pelvis; detects pulmonary or hepatic lesions.

    Tumor Markers and Their Diagnostic Correlations

    Serum tumor markers are essential for classifying testicular cancer histology, assessing response to treatment, and monitoring recurrence. Their levels correlate with specific tumor types and prognostic risk categories (e.g., IGCCCG classification).

    Key Tumor Markers and Their Associations
    Tumor markers are measured pre-treatment, post-orchiectomy, and during follow-up to evaluate therapeutic response. Elevated levels at diagnosis may indicate advanced disease or aggressive histology, while normalization post-treatment suggests effective therapy.

    "Pre-orchiectomy serum markers: AFP 1200 ng/mL, β-hCG 50,000 mIU/mL, LDH 800 U/L. Post-orchiectomy normalization of AFP and β-hCG with residual LDH elevation suggests seminoma with possible teratoma components."
    Laboratory Correlations with Imaging Findings
  • AFP (Alpha-Fetoprotein): Elevated in yolk sac tumors and mixed NSGCTs; may correlate with heterogeneous ultrasound appearance or necrotic regions on MRI.
  • β-hCG (Beta-HCG): Elevated in choriocarcinoma and seminomas; high levels (>500 mIU/mL) may indicate aggressive vascularity on Doppler ultrasound or rapid lymph node enlargement on CT.
  • LDH (Lactate Dehydrogenase): Non-specific marker for tumor burden; elevated in large or necrotic tumors visible on imaging.
  • PLAP (Placental Alkaline Phosphatase): Useful for seminoma diagnosis when other markers are normal; may correspond to homogeneous hypoechoic lesions on ultrasound.

    • Radiologic Report Structure for Suspicious Testicular Lesions

    Radiologists employ standardized terminology to describe testicular masses, ensuring clarity for urologists and oncologists. Reports typically include:
    1. Lesion Characteristics: Size, echogenicity, borders, and internal features.
    2. Vascularity: Doppler findings and blood flow patterns.
    3. Surrounding Structures: Involvement of tunica albuginea, epididymis, or hydrocele.
    4. Differential Diagnosis: Malignant vs. benign considerations with supporting imaging evidence.
    "Right testicular ultrasound: 1.9 cm irregular hypoechoic mass with heterogeneous internal echoes and peripheral vascularity on color Doppler. The lesion abuts the tunica albuginea without clear fat plane, and there are no calcifications. Differential diagnosis includes malignant germ cell tumor (seminoma or NSGCT) versus complex testicular cyst. Recommend scrotal exploration for definitive diagnosis."
    Common Descriptive Phrases in Reports
  • "Well-defined hypoechoic mass" → Likely benign (e.g., cyst, epidermoid).
  • "Ill-defined hyperechoic regions with shadowing" → Suggests calcification or necrosis (common in teratoma).
  • "Tumor blush on Doppler" → Indicates hypervascularity (malignancy).
  • "Lymphadenopathy in the para-aortic chain" → Suggests metastatic disease on CT/MRI.

    • what does testicular cancer look like - Ilustrasi 2

    Histological and Microscopic Features of Testicular Germ Cell Tumors

    Testicular germ cell tumors (GCTs) exhibit distinct histological and immunohistochemical profiles under light microscopy, enabling precise classification into seminomatous and nonseminomatous subtypes. These microscopic features, combined with immunohistochemical staining patterns, serve as critical diagnostic tools for pathologists. The morphological characteristics—such as cellular architecture, nuclear atypia, and mitotic activity—differ markedly between subtypes, influencing treatment strategies and prognostic assessments.
    Key Diagnostic Principle: Histological examination of testicular tumors relies on identifying cellular origin (germ cell vs. somatic), growth patterns (solid, papillary, tubular), and immunohistochemical markers to distinguish between seminomas, embryonal carcinomas, yolk sac tumors, choriocarcinomas, and teratomas.

    Microscopic Appearance of Seminomatous and Nonseminomatous Germ Cell Tumors

    Seminomas and nonseminomatous GCTs (NSGCTs) display unique histological traits under hematoxylin and eosin (H&E) staining, allowing differentiation based on cellular morphology and tissue organization.

    Seminomas

  • Cell Type: Uniform large cells with clear or eosinophilic cytoplasm, centrally located nuclei, and prominent nucleoli.
  • Growth Pattern: Sheets or lobules of cells with a fibrous stroma, often infiltrated by lymphocytes (lymphocytic infiltration is a hallmark).
  • Key Features:
    • Classic Seminoma: Large cells with a "fried-egg" appearance due to clear cytoplasm and central nuclei, surrounded by lymphocytes.
    • Spermatocytic Seminoma: Triphasic appearance with small, intermediate, and large cells; lacks lymphocytic infiltration.
    • Anaplastic Seminoma: Mitotic figures and nuclear atypia, resembling nonseminomatous tumors but retaining seminomatous markers.
  • Associated Markers: Positive for PLAP (placental alkaline phosphatase), OCT3/4, and CD117; negative for cytokeratins.

    • Nonseminomatous Germ Cell Tumors (NSGCTs)

  • Embryonal Carcinoma:
  • Cell Type: Primitive epithelial cells with large nuclei, prominent nucleoli, and high mitotic activity.
  • Growth Pattern: Solid sheets, glandular, or papillary structures; often with necrosis and hemorrhage.
  • Key Features:
    • Disorganized architecture with glandular or tubular formations.
    • Extensive necrosis ("dirty necrosis") and mitotic figures.
  • Associated Markers: Positive for CD30, OCT3/4, and cytokeratins; PLAP may be focal.

    • - Yolk Sac Tumor (Endodermal Sinus Tumor):

  • Cell Type: Polyhedral or cuboidal cells with clear or eosinophilic cytoplasm.
  • Growth Pattern: Microcystic, reticular, or papillary patterns resembling primitive glomeruli ("Schiller-Duval bodies").
  • Key Features:
    • Extracellular hyaline droplets and eosinophilic globules.
    • Schiller-Duval bodies (central blood vessels surrounded by cuboidal cells).
  • Associated Markers: Positive for AFP (α-fetoprotein), SALL4, and glypican-3; PLAP may be positive.

    • - Choriocarcinoma:

  • Cell Type: Biphasic with cytotrophoblastic (mononuclear) and syncytiotrophoblastic (multinucleated) cells.
  • Growth Pattern: Hemorrhagic and necrotic foci with poorly formed villi.
  • Key Features:
    • Syncytiotrophoblastic giant cells with eosinophilic cytoplasm.
    • Extensive hemorrhage and necrosis.
  • Associated Markers: Positive for β-hCG (human chorionic gonadotropin), PLAP, and OCT3/4.

    • - Teratoma:

  • Cell Type: Mature (adipose, cartilage, squamous epithelium) or immature (primitive neuroepithelium) tissues.
  • Growth Pattern: Disorganized mixtures of somatic tissues; may include cystic components.
  • Key Features:
    • Presence of well-differentiated structures (e.g., hair follicles, glandular elements).
    • Immature teratomas show primitive neural or mesenchymal tissues.
  • Associated Markers: Negative for germ cell markers; may express cytokeratins or SALL4 in immature components.

    • Comparison of Histological Types of Testicular Germ Cell Tumors

    The following table summarizes the distinguishing features of common testicular GCT subtypes under light microscopy, including cellular morphology, growth patterns, and immunohistochemical profiles.
    Histological Type Cell Type Growth Pattern Key Features Associated Markers
    Classic Seminoma Large cells with clear cytoplasm, central nuclei, and prominent nucleoli Sheets or lobules with lymphocytic infiltration Fried-egg appearance; no glandular/papillary structures PLAP+, OCT3/4+, CD117+, cytokeratin-
    Spermatocytic Seminoma Small, intermediate, and large cells; no clear cytoplasm Discrete nodules without lymphocytic infiltration Triphasic appearance; lacks necrosis PLAP-, OCT3/4-, CD117+ (variable)
    Embryonal Carcinoma Primitive epithelial cells with large nuclei and high N:C ratio Solid, glandular, or papillary; extensive necrosis Disorganized architecture; mitotic figures CD30+, OCT3/4+, cytokeratin+, PLAP±
    Yolk Sac Tumor Polyhedral cells with clear/eosinophilic cytoplasm Microcystic, reticular, or papillary (Schiller-Duval bodies) Extracellular hyaline droplets; AFP-positive globules AFP+, SALL4+, glypican-3+, PLAP±
    Choriocarcinoma Cytotrophoblastic (mononuclear) and syncytiotrophoblastic (multinucleated) cells Hemorrhagic and necrotic foci Syncytiotrophoblastic giant cells; β-hCG production β-hCG+, PLAP+, OCT3/4+, cytokeratin+
    Mature Teratoma Differentiated somatic tissues (e.g., adipose, cartilage, squamous epithelium) Cystic or solid; organized structures Well-formed glandular or mesenchymal elements Negative for germ cell markers; cytokeratin+ in epithelial components
    Immature Teratoma Primitive neuroepithelial or mesenchymal cells Disorganized with immature neural tubes or glomeruli High mitotic activity; lacks mature differentiation SALL4+, OCT3/4±; cytokeratin+ in epithelial foci

    Immunohistochemical Staining Patterns in Testicular Germ Cell Tumors

    Immunohistochemistry (IHC) plays a pivotal role in confirming the diagnosis and subclassifying testicular GCTs by identifying specific protein expression linked to tumor differentiation and origin. Staining intensity, localization (nuclear, cytoplasmic, or membranous), and pattern (diffuse, focal, or patchy) provide critical diagnostic clues.

    Common Immunohistochemical Markers and Their Patterns

  • PLAP (Placental Alkaline Phosphatase):
  • Staining Localization: Membranous and cytoplasmic.
  • Intensity: Strong and diffuse in seminomas; may be focal in embryonal carcinoma or yolk sac tumors.
  • Diagnostic Use: Positive in >90% of seminomas; negative in spermatocytic semin

    Advanced Staging and Metastatic Appearance of Testicular Cancer

    • Metastatic testicular cancer presents distinct imaging and clinical features that vary by tumor type (seminoma vs. nonseminomatous germ cell tumors) and anatomical location. Early detection of metastatic spread is critical for staging (I–III) and guiding therapeutic strategies, including surgery, chemotherapy, or radiation. This section examines the visual and imaging characteristics of metastatic deposits in common sites, compares primary and metastatic tumor appearances, and explores the role of PET scans in differentiating viable disease from post-treatment changes.

    Imaging Characteristics of Metastatic Testicular Cancer by Site

    Metastatic testicular cancer most frequently involves the retroperitoneal lymph nodes, lungs, liver, and, less commonly, bones or brain. Each site exhibits unique imaging features influenced by tumor histology, size, and response to therapy.

    Retroperitoneal Lymph Nodes
    Enlarged lymph nodes (>1 cm in short-axis diameter) with loss of fatty hilum and heterogeneous contrast enhancement are hallmark findings. Seminomas typically appear as homogeneous masses with well-defined margins, while nonseminomatous germ cell tumors (NSGCTs) may show cystic components, necrosis, or irregular borders. Stage IIB is characterized by multiple enlarged nodes (>2 cm) with central necrosis or vascular invasion visible on CT or MRI.

    Lungs
    Pulmonary metastases appear as solitary or multiple nodules, often with spiculated or irregular margins. NSGCTs frequently present as cavitary lesions or ground-glass opacities, whereas seminomas tend to be solid and well-circumscribed. Stage III may show diffuse military metastases or pleural effusions, particularly in advanced disease.

    Liver
    Hepatic metastases typically appear as hypoattenuating lesions on CT or hypointense on T1-weighted MRI, with peripheral rim enhancement post-contrast. Seminomas may demonstrate homogeneous enhancement, while NSGCTs often exhibit heterogeneous patterns due to hemorrhage or necrosis.

    Bone and Brain
    Osteolytic or mixed lytic-sclerotic lesions in vertebrae or long bones are common in advanced disease. Brain metastases, though rare, appear as ring-enhancing lesions on MRI with surrounding edema.

    Comparison of Primary Testicular Tumors and Metastatic Deposits

    The following table summarizes key differences in imaging features between primary testicular tumors and their metastatic counterparts, along with diagnostic challenges.
    Location Primary Tumor Features Metastatic Features Diagnostic Challenges
    Testis Well-defined mass with heterogeneous enhancement; seminomas often homogeneous, NSGCTs may show cystic/necrotic areas. N/A (primary site) Differentiating between intratesticular and extratesticular extension.
    Retroperitoneal Lymph Nodes N/A Enlarged nodes (>1 cm short axis), loss of fatty hilum, heterogeneous enhancement; NSGCTs may show necrosis. Distinguishing reactive lymphadenopathy from metastasis in early-stage disease.
    Lungs N/A Solitary/multiple nodules (spiculated or cavitary in NSGCTs); ground-glass opacities in advanced disease. Differentiating metastases from infectious/inflammatory nodules (e.g., tuberculosis, fungal infections).
    Liver N/A Hypoattenuating lesions with peripheral rim enhancement; heterogeneous in NSGCTs. Excluding benign lesions (e.g., hemangiomas, cysts) or post-chemotherapy changes.
    Bone N/A Osteolytic/mixed lytic-sclerotic lesions; vertebral collapse in advanced cases. Distinguishing metastatic disease from benign conditions (e.g., degenerative changes, infections).

    Role of PET Scans in Differentiating Viable Metastases from Post-Treatment Changes

    Positron emission tomography (PET) using 18F-fluorodeoxyglucose (FDG) is invaluable for identifying metabolically active tumor deposits. Seminomas exhibit high FDG avidity, while NSGCTs may show variable uptake due to cystic or necrotic components. Key findings include:
  • Active metastases demonstrate increased FDG uptake (SUVmax > 3.5), correlating with viable tumor.
  • Post-treatment fibrosis/scar tissue typically shows low or no FDG uptake, aiding in treatment response assessment.
  • False negatives may occur in NSGCTs with extensive necrosis or in seminomas with low glycolytic activity.

    • Example: A patient with Stage III NSGCT post-chemotherapy may show residual retroperitoneal masses on CT but minimal FDG uptake on PET, suggesting fibrosis rather than persistent disease.

    Imaging Progression of Testicular Cancer by Stage

    The following descriptions outline typical imaging findings at each clinical stage, emphasizing metastatic spread patterns.

    Stage I (Localized Disease)

  • Testis: Single mass with heterogeneous enhancement; no evidence of lymph node or distant metastases.
  • Imaging: CT/MRI of the abdomen/pelvis to exclude occult retroperitoneal lymphadenopathy.

    • Stage II (Regional Lymph Node Metastasis)

  • IIA: Single retroperitoneal lymph node >2 cm or multiple nodes ≤5 cm.
  • IIB: Multiple nodes >5 cm or bulky disease (>10 cm) with possible vascular invasion.
  • Imaging: CT/MRI shows enlarged nodes with loss of fatty hilum; contrast enhancement highlights necrosis or hemorrhage.

    • Stage III (Distant Metastasis)

  • IIIA: Non-pulmonary visceral metastases (e.g., liver, bone).
  • IIIB: Pulmonary metastases with or without retroperitoneal lymphadenopathy.
  • IIIC: Both pulmonary and non-pulmonary visceral metastases.
  • Imaging: CT chest/abdomen/pelvis reveals multiple lung nodules, hepatic lesions, or bony destruction. PET-CT may identify occult metastases in low-signal areas (e.g., brain, adrenal glands).

    • Example Progression:
    A patient with Stage IIB NSGCT presents with bilateral retroperitoneal lymphadenopathy (>3 cm) and central necrosis on CT. After chemotherapy, residual masses show no FDG uptake on PET, indicating treatment response. However, new lung nodules appear on follow-up imaging, upgrading the stage to IIIB.

    what does testicular cancer look like - Ilustrasi 3

    Differential Diagnoses and Mimics of Testicular Cancer

    Accurate diagnosis of testicular cancer requires careful differentiation from benign scrotal pathologies that may present with overlapping clinical and imaging features. Misdiagnosis can lead to delayed treatment or unnecessary interventions, underscoring the importance of a systematic approach integrating patient history, physical examination, and advanced imaging. This section explores common and rare mimics of testicular cancer, emphasizing tactile, visual, and diagnostic distinctions to guide clinical decision-making.

    Common Benign Scrotal Masses and Their Distinguishing Features

    Benign conditions frequently mimic testicular cancer due to shared symptoms such as scrotal swelling, pain, or palpable masses. Key differences lie in patient history, physical examination findings, and imaging characteristics. Below is a structured comparison to facilitate differentiation.
    Critical Distinction: Testicular cancer typically presents as a firm, painless, intratesticular mass with rapid growth, whereas benign conditions often exhibit soft, well-circumscribed, extratesticular masses or secondary symptoms (e.g., hydrocele-associated dull ache).
    Flowchart for Differentiating Testicular Cancer from Benign Conditions
    The following decision pathway guides clinicians through the diagnostic process based on clinical presentation and imaging:

    - Patient History and Symptoms

  • Acute onset pain → Likely torsion (requires emergency surgery).
  • Gradual swelling without pain → Evaluate for hydrocele or varicocele.
  • Painless mass with rapid growth → Testicular cancer (high suspicion).
  • Recurrent episodes of pain/swelling → Epididymal cyst or spermatoceles.

    • - Physical Examination

  • Transillumination positive → Hydrocele (fluid-filled, luminous under light).
  • Palpable "bag of worms" sensation → Varicocele (dilated pampiniform plexus).
  • Mass fixed to testis, non-transilluminating → Testicular tumor (requires ultrasound).
  • Cystic, mobile mass near epididymis → Spermatoceles or epididymal cysts.

    • - Imaging Findings (Ultrasound as First-Line)

  • Homogeneous, anechoic fluid collection → Hydrocele.
  • Tubular, hypoechoic structures → Varicocele (dilated veins).
  • Well-defined, anechoic cyst → Spermatocele (often <2 cm, contains sperm).
  • Heterogeneous, hypervascular intratesticular mass → Testicular cancer (requires biopsy).

    • - Definitive Diagnosis

  • Testicular cancer: Confirmed via radical orchiectomy and histology.
  • Benign conditions: Managed conservatively or surgically (e.g., hydrocelectomy for symptomatic hydrocele).

    • Detailed Comparison of Testicular Cancer and Benign Scrotal Masses

    The following table summarizes the key distinguishing features of testicular cancer and its most common mimics, facilitating rapid clinical assessment.
    Condition Appearance Palpation Findings Key Distinguishing Features
    Testicular Cancer
    • Firm, irregular, or nodular mass within the testis.
    • May cause testicular enlargement or asymmetry.
    • Color changes (e.g., bluish discoloration in advanced cases).
    • Hard, fixed to testis, non-transilluminating.
    • Painless unless associated with hemorrhage or inflammation.
    • Rapid growth over weeks/months.
    • Ultrasound: Heterogeneous, hypervascular intratesticular mass with microcalcifications.
    • Tumor markers (AFP, β-hCG, LDH) elevated in germ cell tumors.
    • Histology: Germ cell or non-germ cell tumors (e.g., seminoma, embryonal carcinoma).
    Hydrocele
    • Diffuse scrotal swelling, often translucent.
    • May cause visible enlargement without mass effect.
    • Soft, fluctuant, transilluminates under light.
    • Painless unless complicated (e.g., infection).
    • Gradual onset, often bilateral.
    • Ultrasound: Anechoic fluid collection surrounding testis.
    • No vascular flow on Doppler.
    • Associated with congenital defects, trauma, or infection.
    Varicocele
    • "Bag of worms" appearance on standing.
    • More prominent with Valsalva maneuver.
    • Palpable dilated veins, soft, tubular.
    • Left-sided predominance (80% of cases).
    • May cause dull ache or infertility.
    • Ultrasound: Dilated, tortuous veins (>3 mm) in pampiniform plexus.
    • Collapses with supine position.
    • No mass effect or intratesticular changes.
    Spermatoceles
    • Small (<2 cm), cystic mass near epididymal head.
    • May contain sperm (milky fluid on aspiration).
    • Soft, mobile, non-tender.
    • Separate from testis (extratesticular).
    • Ultrasound: Well-circumscribed, anechoic cyst with posterior acoustic enhancement.
    • No vascularity on Doppler.
    • Often asymptomatic; incidental finding.
    Epididymal Cysts
    • Similar to spermatoceles but may be larger (>2 cm).
    • Located along epididymal body/tail.
    • Soft, mobile, distinct from testis.
    • Painless unless infected.
    • Ultrasound: Anechoic or slightly echogenic cyst with clear margins.
    • No internal vascularity.
    • May resolve spontaneously or require drainage.
    Hematocele
    • Scrotal swelling with ecchymosis (bruising).
    • May follow trauma or surgery.
    • Fluctuant, tender, non-transilluminating.
    • Acute onset with pain.
    • Ultrasound: Complex fluid collection with debris or clots (heterogeneous echotexture).
    • May show layering of blood products.
    • Associated with trauma, anticoagulation, or post-orchiectomy.

    Rare but Critical Mimics of Testicular Cancer

    Recognizing the visual and diagnostic hallmarks of testicular cancer is a multifaceted process that integrates clinical examination, advanced imaging, and histopathological analysis. Whether identifying a firm, painless nodule during a self-exam or interpreting complex ultrasound findings, each step in the diagnostic journey plays a pivotal role in distinguishing malignant from benign conditions. By leveraging structured comparisons—such as echogenicity patterns in ultrasound, immunohistochemical staining profiles, or metastatic characteristics in PET scans—clinicians can refine their approach to early detection and staging. Ultimately, this comprehensive understanding not only enhances diagnostic precision but also underscores the importance of vigilance in managing one of the most treatable yet potentially aggressive cancers in young adults.

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