Dermoscopic features of digital mucous cysts: A study of 23 cases

Abstract

Digital mucous cysts (DMC) are common benign myxoid cysts typically located on the fingers and toes. Recently, dermoscopic patterns of DMC were reported. However, only a small number of cases were described in the published work; therefore, information on this topic is scarce in the published work. We investigated dermoscopic patterns of histopathologically diagnosed DMC. In total, 23 cases were enrolled in this study. Polarized dermoscopy revealed vascular patterns in 13 cases (56.5%), with arborizing vascular patterns, dotted vessels, linear vessels and polymorphous vessels in eight (34.8%), three (13.0%), one (4.3%) and one (4.3%) case, respectively. Red-purple lacunas, ulceration, nail dystrophy and white shiny structures were detected in five (21.7%), two (8.7%), seven (30.4%) and six cases (26.1%), respectively. We report the largest case series regarding dermoscopic features of DMC to date. Dermoscopy can be used as a helpful adjuvant and non-invasive tool in the diagnosis of DMC.

Unusual association between digital mucous cyst and acquired ungual fibrokeratoma: A case report

“…4 DMC and ADF sometimes show similar clinical symptoms, making the clinical diagnosis difficult. 5 However, there have been no case reports of DMC associated with ADF, as in our patient.…”

Acquired digital arteriovenous malformation presenting as erythronychia

“…Clinically, it usually presents as a purpuric nodule located on the periungual area. 3 However, dermoscopic features of ADAVM are scarcely described in the published work to date. 1 Dermoscopy can be a helpful adjuvant diagnostic tool in the differential diagnosis of periungual or ungual tumors.…”

“…1 Dermoscopy can be a helpful adjuvant diagnostic tool in the differential diagnosis of periungual or ungual tumors. 3 However, dermoscopic features of ADAVM are scarcely described in the published work to date. 4,5 Yang and Ohara first reported three cases of periungual ADAVM with several dilated, tortuous vessels within a milky red background in an irregularly shaped area.…”

Quiste mixoide (mucoide) digital en un dedo del pie: asociación con osteoartritis y deformidad ungueal

“…Solo en determinados casos hay que recurrir a técnicas como la dermatoscopia, la transiluminación, la ecografía, la resonancia magnética, la biopsia o la extirpación para obtener una muestra para estudio histopatológico. La imagen dermatoscópica característica evidencia vasos arboriformes y puntiformes, lagunas rojo-azuladas, ulceración y estructuras blancas brillantes2, 3, 5.…”

“…El diagnóstico diferencial debe realizarse principalmente con el tumor glómico subungueal, el granuloma piogénico, el fibroqueratoma digital adquirido, el tumor de células gigantes de vainas tendinosas, la verruga vulgar, el mixoma, el angiomixoma superficial, el ganglión y los nódulos de Heberden y de Bouchard asociados a osteoartritis1, 5.…”