RESUMO
Glomus tumor, a rare benign vascular tumor arising from the neuromyoarterial apparatus, is usually located at the tip of digits, especially at subungual region. Most of this tumor present typical symptoms such as hypersensitivity to cold, severe pain and point tenderness but frequently misdiagnosed as neuroma, gout or causalgia. Concerning about the origin of the glomus tumor, there were few written reports about extra-digit vascular origin glomus tumor especially that occurred at forearm artery. Recently we experienced a glomus tumor which arised at forearm radial artery and reported with review of literatures. A 31-year-old female admitted to our department with pulsating, slow growing, tender mass at her left forearm for about 1 year. After diagnostic evaluation of ultrasonography and magnetic resonance angiography, surgical resection was performed under the diagnosis of radial artery aneurysm but the histologic final diagnosis made by special immunohistochemical stains was glomus tumor originated from radial artery. The postoperative course was uneventful up to 2 years of follow up.