Neural and neuroendocrine tumors

CD99 expression in Merkel cell carcinoma: a case series with an unusual paranuclear dot‐like staining pattern

“…Expression of CD99 in MCC has shown no relationship with tumor invasion or prognosis . PSCC and PNET were selected for the comparison group as they frequently enter the differential diagnosis of MCC …”

Giant granular cell tumor of the vulva

“…Immunohistochemical stains are positive for S100 protein, neuron specific enolase, peripheral nerve myelin proteins and vimentin. [4] Granular cell tumors mostly follow a benign course but, since they are locally infiltrative, most authors recommend complete surgical excision with uninvolved margins to prevent clinical recurrence. Clinically the differential diagnosis should include benign cystic lesions such as bartholin gland tumors, sebaceous cysts and other nodular benign painless vulvar lesions such as dermatofibromas, hidradenomas, lipomas and papillomas.…”

Traumatic neuroma of the penis after circumcision - Case report

“…The palisade encapsulated neuromas are hamartomatous proliferations of nerve fibers with no apparent previous tissue damage. 2 …”