“…Dowling–Degos disease (reticulate pigmented anomaly of the flexures 1 ) is an autosomal dominant genodermatosis characterized by an epithelial naevoid anomaly 2 showing reticular pigmentation of the flexural areas and follicular lesions such as pitted scars near the angles of the mouth and dark comedone‐like lesions on the neck. In addition to these features, multiple seborrhoeic keratosis‐like lesions, 1,3–6 finger‐like fibroma, 2,7 dystrophic fingernails 8,9 and follicular lesions such as epidermoid cysts, 1,5 , 7 pilonidal sinus 1,7 and hidradenitis suppurativa 10–13 are often associated. Histological characteristics are narrow strands of heavily pigmented epithelial cells extending from both the epidermis and pilosebaceous follicles.…”