Dermoscopy of lipidised dermatofibroma: A morphological study of 13 cases

Abstract

Background/objectives: The aim of this study was to evaluate the morphological findings of lipidised dermatofibromas under dermoscopic observation.

Methods: Dermoscopic examination of 13 cases of lipidised dermatofibromas was performed to evaluate specific dermoscopic criteria and patterns.

Results: The most frequently occurring dermoscopic features were as follows: (i) A yellowish homogenous pigmentation in all cases (100%); this pigmentation was total in 30.7%; (ii) White structures were seen in 46.1%, most of them were central white networks (38.4%); (iii) Pigment network was observed in 53.8%, most of them were peripheral delicate pigment networks (38.4%), but two cases showed an atypical pigment network; (iv) The presence of vascular structures was common (10 cases, 77%); (v) Regarding to dermoscopic patterns, five lipidised dermatofibromas (38.4%) showed a total yellowish homogeneous pattern; 38.4% an atypical pattern and 23.2% a 'central white network + peripheral delicate pigment network' pattern.

Conclusions: The dermoscopic recognition of a total yellowish homogeneous area or a yellowish colouration in the context of a dermatofibroma can be proposed to help suspecting a lipidised dermatofibroma.

Keywords: dermoscopy; lipidised dermatofibroma; lipidised fibrous histiocytoma.