[NON-SPECIFIC GRANULOMATOUS PROSTATITIS: A CASE REPORT].

We report non-specific granulomatous prostatitis in a 58-year-old man who visited a Urology clinic with fever and dysuria. Digital rectal examination revealed prostatic tenderness, and laboratory examination of the urinary sediment revealed pyuria. Thus, he was diagnosed with acute bacterial prostatitis and treated with antibiotics. He remained symptomatic despite treatment; therefore, he was referred to our hospital. A second digital rectal examination (performed at our hospital) revealed stony hard nodules in the prostate and an irregularity of its surface. Moreover, magnetic resonance imaging (MRI) suggested a prostate cancer. We performed a transperineal needle biopsy, which revealed only non-specific inflammatory cells without any evidence of neoplasm in the specimen. Therefore, a definitive diagnosis could not be established. Nevertheless, he continued to show a high index of suspicion for prostatic malignancy based on his clinical findings. Therefore, we performed a transurethral resection of the prostate and a transrectal biopsy to obtain more specimens. Microscopic findings revealed granulomatous prostatitis without any evidence of prostate carcinoma. Notably, an MRI demonstrated remarkable shrinkage of the prostate 3 months after the diagnosis. Non-specific granulomatous prostatitis is a rare inflammatory disease. Because it is difficult to differentiate this disease from prostatic neoplasms based on clinical findings or imaging modalities such as MRI, a few reports have described performing a radical prostatectomy in patients. This disease usually demonstrates a good prognosis as was noted in our patient. We conclude that establishing a preoperative histopathological diagnosis is important to avoid invasive procedures.