Diagnosing testicular lumps in primary care

Area of Science:

• Urology
• Oncology
• General Practice

Background:

• Testicular cancer incidence is rising but remains uncommon, with general practitioners (GPs) rarely encountering new diagnoses.
• A UK study found only 4% of referrals for testicular lumps or pain were malignant, with benign conditions like epididymal cysts (27%) and hydroceles (11%) being more frequent.
• Germ cell tumours constitute 95-98% of testicular cancers, and while overall survival is high (95%), prognosis varies significantly by stage and type.

Purpose of the Study:

• To analyze the differential diagnosis of scrotal swellings presenting to primary care.
• To highlight the low incidence of testicular cancer among referrals for scrotal abnormalities.
• To emphasize the importance of distinguishing intra-testicular from extra-testicular lesions for malignancy risk assessment.

Main Methods:

• Retrospective analysis of 845 patients referred with testicular lumps or pain.
• Categorization of scrotal findings into malignant and benign conditions.
• Review of diagnostic criteria and referral guidelines (NICE).

Main Results:

• Only 33 (4%) of referred patients were diagnosed with testicular cancer.
• Epididymal cysts (27%) and hydroceles (11%) were the most common benign findings.
• Intra-testicular lesions have a high likelihood (approx. 90%) of being malignant, while extra-testicular lesions are typically benign.

Conclusions:

• Most scrotal lumps referred to GPs are benign, necessitating careful evaluation to avoid unnecessary patient anxiety.
• NICE guidelines recommend urgent referral for non-painful testicular changes or any testicular mass not clearly indicative of infection.
• Urgent ultrasound referral is advised for specific patient groups, including young men with hydroceles or cases with uncertain mass location.