Journal List > J Korean Soc Surg Hand > v.20(4) > 1106499

J Korean Soc Surg Hand. 2015 Dec;20(4):176-179. Korean.
Published online December 31, 2015.
Copyright © 2015. The Korean Society for Surgery of the Hand
Glomus Tumor in a Extradigital Lesion of Forearm: A Case Report
Yong Sik Lee and Yeong-Hyeon Lee
Department of Orthopedic Surgery, Pohang St. Mary Hospital, Pohang, Korea.

Correspondence to: Yeong-Hyeon Lee. Department of Orthopedic Surgery, Pohang St. Mary Hospital, 17 Daejamdong-gil, Nam-gu, Pohang, Korea. TEL: +82-54-260-8139, FAX: +82-54-260-8115, Email:
Received April 12, 2015; Revised September 17, 2015; Accepted September 21, 2015.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


A 36-year-old man presented with a hard mass on the right forearm. He had no specific symptom, but wanted surgical excision for cosmetic purpose. On the physical examination, the mass was located on the ulnar side of forearm, presented mild tenderness. Ultrasound examination showed a hypoechoic mass, 1.3 × 1 cm mass in the subcutaneous tissues. Under the local anesthesia, the patient underwent an excisional biopsy of the lesion. The histopathology and the immunohistochemical analysis confirmed the tumor to be a glomus tumor. The extradigital glomus tumors are sparsely reported apart from pain. The patients can present with subcutaneous nodule, or with discoloration of the skin. These atypical symptoms make difficult to diagnose extradigital glomus tumors. In the current study, we report the case of a patient with asymptomatic glomus tumor in a extradigital lesion of forearm.

Keywords: Glomus tumor; Forearm


Fig. 1
Preoperative clinicial photo shows protruding mass localized to the proximal dorsal portion of forearm.
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Fig. 2
Ultrasonography of the right forearm. About 1.34×0.7 cm sized hypoechoic lesion is located on subcutaneous fat layer.
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Fig. 3
A photograph shows two pieces of yellowish solid mass, measuring 1.3×1×0.9 cm in size for the larger one.
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Fig. 4
A photograph shows small, uniform and rounded glomus cells nests surrounding capillary sized vessels. The vascular structures surrounded by small clusters of glomus cells are glomangioma (H&E, ×40).
Click for larger image

1. Lee SK, Song DG, Choy WS. Intravascular glomus tumor of the forearm causing chronic pain and focal tenderness. Case Rep Orthop 2014;2014:619490.
2. Schiefer TK, Parker WL, Anakwenze OA, Amadio PC, Inwards CY, Spinner RJ. Extradigital glomus tumors: a 20-year experience. Mayo Clin Proc 2006;81:1337–1344.
3. Kim SH, Suh HS, Choi JH, Sung KJ, Moon KC, Koh JK. Glomus tumor: a clinical and histopathologic analysis of 17 cases. Ann Dermatol 2000:95–101.
4. Lee CH, Byeon JH, Rhie JW, Kang YJ, Cho MJ, Lim P. Clinical analysis of twenty cases of glomus tumor in the digits. J Korean Soc Plast Reconstr Surg 1995;22:169–178.
5. Takei TR, Nalebuff EA. Extradigital glomus tumour. J Hand Surg Br 1995;20:409–412.
6. Nigam JS, Misra V, Singh A, Karuna V, Chauhan S. A glomus tumour arising from the flexor aspect of the forearm: a case report with review of the literature. J Clin Diagn Res 2012;6:1559–1561.
7. Schoenleber SJ, Rosenberg AE, Temple HT. Painful forearm mass in a 75-year-old man. Clin Orthop Relat Res 2014;472:776–780.