Myopericytoma tumor of the glans penis.

Myopericytoma is a low grade spindle cell neoplasm largely occurring in skin. We describe the first reported case of a penile myopericytoma. Histologically, the penile tumor was composed of a perivascular proliferation of tumor cells with ovoid shaped nuclei and abundant eosinophilic cytoplasm. Immunohistochemically, the tumor was reactive for markers of smooth muscle differentiation and vascular differentiation. The tumor was noted to be negative for BRAF by immunohistochemistry and wild-type upon gene sequencing using SnaPshot. Our finding serves to expand the anatomical distribution of myopericytoma and broadens the spectrum of primary mesenchymal neoplasms that may be encountered in the penis.