Extradigital glomus tumor: dermoscopic description and histopathological correlation

Abstract

Glomus tumors are rare benign neoplasms arising from the neuromyoarterial structure called glomus body. They present as angiomatous papules, soft and painful, especially to cold and pressure. In general, they are solitary and affect the extremities, located mainly the subungual bed. Extradigital lesions are rare and can constitute a diagnostic challenge. This is the report of a patient with an extradigital lesion on the left arm, and its dermoscopic aspects, including angiomatous lagoons circumscribed by a pale halo, a structure not previously described in the two reports of extradigital glomus tumor with dermoscopic features, found in the literature.

Relationship between dermoscopic and histopathological findings of extradigital glomus tumors

“…In conclusion, the dermoscopic presentation of extradigital glomus tumors has been documented in only seven previous case reports 10,22–26 . There is not a complete review of the literature on the dermoscopy of extradigital glomus tumors; in 2023, the paper by Cohen PR 9 was published.…”

“…In conclusion, the dermoscopic presentation of extradigital glomus tumors has been documented in only seven previous case reports. 10 , 22 , 23 , 24 , 25 , 26 There is not a complete review of the literature on the dermoscopy of extradigital glomus tumors; in 2023, the paper by Cohen PR 9 was published. Although only one case is reported here, additional dermoscopic features of extradigital tumors have been presented.…”

Neoformaciones blandas, de color azul, en tronco

“…En la literatura no se han descrito muchos casos acerca de las características dermatoscópicas del TGE, solo cuatro casos, en donde describen áreas violáceas homogéneas sin estructuras celulares, rodeadas de un halo blanquecino, y en otros casos presencia de reticulado fino telangiectásico y zonas azul grisáceas mal definidas. 7,[11][12][13] En los casos dudosos se ha sugerido efectuar estudios complementarios, tales como ultrasonido y resonancia magnética.…”