Painful testicular metastasis from prostate adenocarcinoma

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A 60-year-old man presented with unilateral testicular pain and urinary frequency. His presenting prostate-specific antigen (PSA) was 100 ng/mL, and a biopsy revealed Gleason 4+4 prostate adenocarcinoma. The significance of his initial PSA was somewhat complicated by possible prostatitis and early initiation of bicalutamide. PSA rose on two occasions prior to radiotherapy but coincided with a flare of testicular pain on one of these. Whole-body staging diffusion-weighted MRI scan was negative. He was treated with 3 years of androgen deprivation therapy (ADT) and radical radiotherapy. PSA fell to undetectable levels on ADT. Twelve months following completion of ADT, PSA rose to 3.6 ng/mL. No disease recurrence was noted on restaging MRI pelvis. The patient was well, except for persistent testicular symptoms, which failed to resolve following multiple antibiotics. Testicular tumour markers were negative. Ultrasound findings were consistent with chronic epididymitis. A right orchidectomy was performed for symptomatic relief, confirming metastatic prostate adenocarcinoma.

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