Neurosarcoma Wheeless

Description: Discussion: - also called malignant schwannoma or fibrosarcoma of nerve sheath; - extracompartmental high grade tumor that develops from sheaths (Schwann cells) of peripheral nerves; - usually is a primary lesion occuring along proximal major nerve trunks, - tumor is usually asymptomatic until it causes neuropraxia; - gross inspection reveals a large fusiform mass; - rather than being displaced by tumor, associated nerve enters proximal pole of the tumor and exits the distal pole