Primary testicular mucinous neoplasms: case report and literature review

Testicular epithelial mucinous tumours are an extremely rare, butinteresting form of testicular neoplasm. We reviewed the medicalliterature using PubMed search terms: testis, mucinous cystadenoma,mucinous cystadenocarcinoma, neoplasms and testicularneoplasms. We describe a case from our institution and provide areview of the literature. Only 11 previously reported cases of mucinoustesticular tumours have been reported in the English literature.The natural history of these tumours is poorly understood, due totheir rarity, but it appears that, like their ovarian counterparts, theyhave an excellent prognosis. Exclusion of metastasis is an importantpoint for the urologist when encountering a mucinous testiculartumour, as metastatic cystic lesions may mimic a primary mucinoustumour. We describe a case of ossified testicular mucinoustumour of low malignant potential. Such tumours are commonin the ovary, but arise very rarely in the testicle. The clinical andhistological features of this tumour are presented, and previouslyreported cases are reviewed to highlight important clinical features.