A case of post-inflammatory warty dyskeratoma of the chest: Other dermoscopic features

Abstract

Warty Dyskeratoma (WD) is a rare condition consisting in single or multiple papular or nodular lesions of the skin or of the oral mucosamucosa. Histologically, a cupshaped epidermal invagination centred by a plug of epidermal hyperparakeratosis with suprabasal acantholysis and dyskeratosis is typically observed. A case of post-inflammatory WD, which was also observed by dermoscopy, is described. Dermoscopy showed an eight-shape whitish collarette surrounded by light brown pigmentation. A central white structureless area with an adjacent rosette were observed. Some small rust-coloured blood crusts were also observed in the centre of the lesion; no prominent vascular pattern was detected. The etiopathogenesis of this benign neoplasm could be multifactorial. Dermoscopy of WD is not specific but may help to ruling out other skin tumors.

Keywords: Warty dyskeratoma; dermatoscopy; dermoscopy; etiopathogenesis; histopathology.

Figure 1.

A) Clinical picture featuring a skin-coloured, umbilicated nodule with a central keratotic plug. B) Dermoscopy of WD, typified by an eight-shape whitish collarette surrounded by light brown pigmentation; a central white structureless area with an adjacent rosette; some small rust-coloured blood crusts at the centre of the lesion. C) Histopathologic picture disclosing a cup-shaped epidermal invagination filled with keratinous hyper-parakeratotic plug. D) A closer histologic view with numerous grains and corps ronds.