Benign Melanocytoma

A benign, circumscribed proliferation of melanocytes in the skin. Variants include the Spitz nevus, halo nevus, blue nevus, and balloon cell…

Abnormal growth of the cells of the tissues contained within the mediastinum (e.g., thymus) without evidence of malignancy.

A benign hemangiopericytoma arising from the mediastinum.

A non-metastasizing neoplasm that arises from the maxillary sinus.

A localized mast cell neoplasm without metastatic potential.

A non-metastasizing neoplasm that arises from the male reproductive system. Representative examples include benign prostate phyllodes tumor, benign Sertoli cell tumor, seminal…