Reticulate pigmented anomaly of the flexures (Dowling-Degos disease): a case report associated with hidradenitis suppurativa and squamous cell carcinoma.

We report the first case of reticulate pigmented anomaly of the flexures (Dowling-Degos disease) associated with hidradenitis suppurativa. Our patient also showed a squamous cell carcinoma of the groin, which is a rare complication of hidradenitis suppurativa. The relationship between Dowling-Degos disease and hidradenitis is discussed and the literature on squamous cell carcinoma and hidradenitis suppurativa is reviewed.