In humans, neurofibroma and schwannoma are distinct entities within the group of benign peripheral nerve sheath tumors. In the veterinary literature, these tumors are often classified together simply as benign peripheral nerve sheath tumors, and diagnostic criteria for their subclassification are not well established. We describe peripheral nerve sheath tumors with microscopic, immunohistologic...

Fifty patients with optic nerve sheath meningiomas have been reviewed with a follow-up of up to 15 years. The median age at onset of their symptoms was 40.0 years. The majority were middle aged females with a slowly progressive lesion. More aggressive lesions were encountered in a younger, predominantly male group of patients with frequent intracranial involvement. Our experience indicates that...

Peroneal nerve entrapment is most commonly seen in the popliteal fossa. It is rarely caused by a ganglion. Intraneural ganglia, although uncommon and seldom cause serious complications, are well recognized and most commonly affect the common peroneal (lateral popliteal) nerve. Ganglionic cysts developing in the sheath of a peripheral nerve or joint capsule may cause compression neuropathy. The ...

abstract introduction & objective: schwannoma, a benign tumor of nerve sheath origin, is commonly found in the head and neck, as well as flexor surfaces of the extremities. it can rarely occur in the breast and stomach with only a few cases being reported. case reports:   the cases are: 1) a 57-year- old man with breast mass, 2) a 58 -year -old man with gastrointestinal complaints who were fina...

Malignant peripheral nerve sheath tumors (MPNSTs) are rare, highly aggressive tumors capable of arising de novo or from preexisting benign neurofibromas or schwannomas. The treatment of choice is surgery. Trunk and extremities are the commonest sites involved. Malignant peripheral nerve sheath tumors are rarely encountered in head and neck region. Here, we report a patient with MPNST of lower l...

Malignant peripheral nerve sheath tumor (MPNST) usually arises in peripheral nerve sheath cells. The intraosseous location of MPNST is rare. Mandible is the most common site of bony involvement. Involvement of bones of the hand is quite unusual. We report a case of MPNST involving metacarpal bones of the left hand treated with surgery followed by adjuvant radiation and chemotherapy and review t...