Solitary Fibrous Tumor of the Prostate: A Diagnostic Challenge: A Case Report.

Solitary fibrous tumor (SFT) of prostate is an unusual type of mesenchymal neoplasm that can elicit a benign or malignant phenotype. It represents a diagnostic challenge as it can simulate poorly differentiated adenocarcinoma and various mesenchymal neoplasms of prostate. We report a case of prostate SFT in a 54-year-old patient, which was clinically misdiagnosed as nodular hyperplasia of prostate with cystitis. However, on follow-up, he was not relieved by the designated treatment. Furthermore, he complained of exacerbation of symptoms and consequently, had to undergo open prostatectomy. Based on histopathological and immunohistochemical (IHC) assessment, a diagnosis of SFT of the prostate was rendered. Additionally, we have discussed the histological mimics of SFT and the diagnostic and prognostic importance of IHC while evaluating such lesions.