Microreticular perineurioma: A new morphological subtype of a rare entity.

Perineurioma is a benign peripheral nerve sheath tumor. Several subtypes have been described, including plexiform, reticular, and sclerosing. The reticular variant has been previously described as having a net or lace-like growth pattern consisting of large anastomosing cords of spindle-shaped cells.

Case of recurrent superficial CD34-positive fibroblastic tumor.

Superficial CD34-positive fibroblastic tumor (SCPFT) is a recently described rare superficial mesenchymal tumor. SCPFT has a distinctive morphologic appearance, marked by significant nuclear pleomorphism, low mitotic rate, and diffuse CD34 positivity. SCPFT is underdiagnosed because of its rarity and misdiagnosis as sarcoma, with very few reported cases of local recurrence or metastasis.

Superficial CD34-positive fibroblastic tumor (SCPFT): A review of pathological and clinical features.

Superficial CD34-positive fibroblastic tumor (SCPFT) is a recently described rare mesenchymal tumor of borderline malignancy. It generally involves superficial soft tissue, with a predilection to the lower extremities. Microscopically this tumor is characterized by a fascicular and storiform growth pattern, spindled to epithelioid cells, nuclear atypia with pleomorphism, and eosinophilic granular, and fibrillar to glassy cytoplasm.