Borderline Paratesticular Mucinous Tumor

**Semantic type:** Neoplastic Process

**Definition:** A rare, non-invasive, mucinous cystic tumor that arises from the paratesticular structures. It is characterized by the presence of irregular papillary formations with irregular branching. The papillae are lined by atypical mucinous epithelial cells. Metastases have not been reported.

**Synonyms:** - Borderline Testicular Adnexa Mucinous Tumor - Paratesticular Mucinous Tumor of Borderline Malignancy - Testicular Adnexa Mucinous Tumor of Borderline Malignancy