Abstract
Neurilemmoma arising from the brachial plexus manifests itself as a tumor mass in the supraclavicular fossa where the brachial plexus exists anatomically. It may be accompanied by pain radiating to the upper limb, tenderness, and neurogenic symptoms such as a feeling of numbness. Neurilemmoma should be considered as a differential preoperative diagnosis because nerve deficiency symptoms develop with tumor removal. A 49-year-old man with a tumor on the left side of the neck was not found in preoperative CT, MRI, gallium scintigraphy, or aspiration cytology to have a definitive diagnosis. Intraoperative findings and rapid pathological examination led to a diagnosis of neurilemmoma. The tumor was removed intercapsularly with a nerve-stimulating device under a microscope while taking care to avoid damaging the nerve. Left upper limb numbness remaining postoperatively improved in 3 months and results were satisfactory overall.
