What does Dermoscopy Say about Glomus Tumors?

Abstract

Glomus tumor is an uncommon tumor arising from the glomus cells. They are usually noted in subungal locations. They are extremely painful to pressure, exposure to cold, and even to touch [1]. The pain increases on application of pressure with the tip of a pencil over the precise area (Love’s sign) [2]. Treatment of choice for glomus tumor is surgical excision. Also, sclerotherapy as well as laser therapy with CO2, pulsed dye and Nd: YAG can be employed. Recurrences are noted due to local invasion of tumor [3]. Since the diagnosis of glomus tumors remains difficult to remember based on clinical criteria, dermoscopy can help. The dermoscopic finding previously reported in the literature include a discrete linear vascular structure on the nail plate and numerous telangiectasias ramified on the nail bed and matrix [4], an altered pigmentary network and a pinkish hue [5]. However, these results are not universal. In a recent report, instead of the pinkish hue, a homogeneous white discoloration of the nail plate was observed [6]. Thus, dermoscopy can be helpful in screening glomus tumor, however, the role of histopathological examination remains essential to make the diagnosis.