Basic and Clinical May, June 2017,Volume 8, Number 3 255 Mohammed Al-Garnawee 1 , Marwan Najjar 1* Case Report: Median Nerve Cavernous Hemangioma Hemangiomas of the median nerve are extremely rare; only 12 cases have been reported in the literature. We discuss a patient who presented with paresthesia and pain along the distribution of the left median nerve secondary to a cavernoma of the proximal part of the nerve as suspected on MRI scan. Total removal of the mass was achieved with immediate relief of the symptoms and no neurologic deicit. We conclude that despite being quite rare, the diagnosis of occult vascular lesions of peripheral nerves such as the median nerve, should be considered, especially when other common pathologies are excluded. A B S T R A C T Key Words: Median nerve, Cavernous hemangioma, Peripheral nerve lesions, Entrapment syndromes Article info: Received: 07 November 2016 First Revision: 09 January 2017 Accepted: 24 January 2017 1. Department of Surgery, Faculty of Medicine, American University of Beirut, Beirut, Lebanon. * Corresponding Author: Marwan Najjar, PhD Address: Department of Surgery, Faculty of Medicine, American University of Beirut, Beirut, Lebanon. Tel: +961 (30) 43704 E-mail: mwnajjar@yahoo.com CrossMark Citation: Al-Gharnawee, M., & Najjar, M. (2017). Median Nerve Cavernous Hemangioma: A case Report. Basic and Clini- cal Neuroscience, 8(3), 255-259. https://doi.org/10.18869/nirp.bcn.8.3.255 : https://doi.org/10.18869/nirp.bcn.8.3.255 Use your device to scan and read the aricle online 1. Introduction eripheral nerve tumors are rare. They can be classiied according to their ori- gin as either nerve sheath tumors or non- neural sheath tumors (Kim, Murovic, Tiel, Moes, & Kline, 2005). The most frequent nerve sheath tumors are benign and include schwannomas and neuroibromas (Schroder, 2001). Benign non-neural sheath tumors mainly include lipo- mas and vascular tumors. Malignant peripheral nerve sheath tumors are much less frequent and could in- clude metastasis. Very few cases of vascular lesions involving the peripheral nervous system have been reported. In this paper, we report on a hemangioma involving the sheath of the left median nerve. 2. Case Report A 43-year-old female presented with 18 months his- tory of left upper extremity paresthesia and pain along the median nerve distribution, which got progressively more severe over time, though with no motor weakness. The patient failed medical treatment. EMG and nerve conduction testing were normal. Magnetic resonance imaging (MRI) results of the cervical spine were within normal limits. MRI of the left upper extremity showed a 9-mm mass arising from the left median nerve sugges- tive of a cavernous hemangioma (Figure 1). On operation, we managed to identify a small irm black-looking mass closely related to the sheath of the left median nerve in the upper arm (Figure 2a). After careful dissection, and under microscopic magniica- P