نتایج جستجو برای: nerve sheath myxoma
تعداد نتایج: 176545 فیلتر نتایج به سال:
A rare variant of ansa cervicalis was discovered during routine dissection of the neck in a male cadaver. The superior root of the Ansa cervicalis was formed by the C1 ventral ramus. It fused with the vagus nerve in place of the hypoglossal nerve without any connection and descended into the carotid sheath with it. Then, C1 ventral ramus formed from the sheath and joined the inferior root from ...
malignant peripheral nerve sheath tumor (mpnst), the principle malignancy of peripheral nerve origin, though rare in the general population, occurs with excessive frequency among patients with neurofi bromatosis. this tumor always arises in soft-tissues, usually found in the lower extremities and only 10-12% of all lesions occur in the head and neck region, which makes it a rare entity. the pri...
a 28-year-old man with neurofibromatosis type 1(nf1) presented with a tumor in the sciatic nerve and femoral nerve. the differential diagnosis of malignant peripheral nerve sheath tumor was based on clinical, radiological, and histological evidence. the tumor apparently originated in sciatic nerve at the posterior aspect of the left thigh. the lesion was resected totally without neural damage t...
BACKGROUND AND PURPOSE The characterization of peripheral nerve sheath tumors is challenging. The purpose here was to investigate the diagnostic value of quantitative proton MR spectroscopy at 3T for the characterization of peripheral nerve sheath tumors as benign or malignant, compared with PET. MATERIALS AND METHODS Twenty participants with 24 peripheral nerve sheath tumors underwent MR spe...
Traumatic neuroma, neurofibroma, neurilemmoma, palisaded encapsulated neuroma and malignant peripheral nerve sheath tumor (MPNST) are peripheral nerve sheath tumors and present neural origin. The goal of this study was to describe the epidemiological data of oral peripheral nerve sheath tumors in a sample of the Brazilian population. Biopsies requested from the Oral Pathology Service, School of...
BACKGROUND AND PURPOSE Differentiating benign from malignant peripheral nerve sheath tumors can be very challenging using conventional MR imaging. Our aim was to test the hypothesis that conventional and functional MR imaging can accurately diagnose malignancy in patients with indeterminate peripheral nerve sheath tumors. MATERIALS AND METHODS This institutional review board-approved, Health ...
A patient with acquired immunodeficiency syndrome (AIDS) developed crytpococcal meningitis, complicated by papilledema and severe progressive visual loss despite medical therapy. Bilateral optic sheath fenestration resulted in significant improvement in vision and resolution of papilledema. Histopathologic evaluation of the optic nerve sheath demonstrated numerous cryptococci. Optic nerve sheat...
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