Laboratory Workup for Testicular Masses
Serum tumor markers (AFP, β-hCG, and LDH) must be drawn and measured prior to any treatment, including orchiectomy, in all patients with a solid testicular mass suspicious for malignancy. 1
Essential Laboratory Tests
Tumor Markers (Pre-Orchiectomy)
The following three markers are mandatory before any intervention:
Alpha-fetoprotein (AFP): Half-life 5-7 days; elevated in nonseminomatous germ cell tumors (embryonal carcinoma, yolk sac tumor). Any elevation in a "pure seminoma" indicates occult nonseminomatous elements and the patient should be treated as having nonseminoma 2, 3, 4
Beta-human chorionic gonadotropin (β-hCG): Half-life 1-3 days; may be elevated in both seminomas (from syncytiotrophoblasts) and nonseminomas. Levels >200 suggest nonseminoma even without histologic confirmation 5, 4
Lactate dehydrogenase (LDH): Less specific marker but critical for risk stratification according to IGCCCG prognostic classification 2, 6, 4
Additional Laboratory Studies
Complete the workup with:
Fertility Assessment (When Relevant)
If fertility preservation is a concern, obtain:
- Total testosterone
- Luteinizing hormone (LH)
- Follicle-stimulating hormone (FSH)
- Semen analysis (ideally before orchiectomy) 5, 4
Post-Orchiectomy Marker Monitoring
Repeat tumor markers at minimum 7 days after orchiectomy to assess half-life kinetics and determine if levels are normalizing, progressing, or plateauing—this information is essential for final staging 2, 5, 6. Continue monitoring until complete normalization occurs. Persistent or rising markers after surgery indicate metastatic disease requiring systemic therapy 4.
Critical Timing Considerations
The strongest evidence emphasizes that tumor markers must be obtained BEFORE orchiectomy because post-surgical values are used for prognostic stratification (IGCCCG classification) and treatment planning 1, 6, 4. In life-threatening metastatic disease with clear clinical diagnosis based on elevated markers, chemotherapy may be initiated immediately without waiting for orchiectomy 2, 6.
Common Pitfalls to Avoid
- Never perform orchiectomy without obtaining pre-operative tumor markers—this eliminates critical prognostic information
- Do not assume normal markers exclude malignancy—markers have low sensitivity, especially in seminoma where the majority have normal AFP and many have normal β-hCG 4
- Remember LDH lacks specificity—it can be elevated for numerous non-malignant reasons but remains important for risk classification 4
- For patients with elevated markers pre-operatively, failure to follow them post-operatively until normalization represents inadequate staging