Acral Lentiginous melanoma arising in Brauer-Buschke-Fischer plantar keratoderma

Type I Punctuate palmoplantar keratoderma or Brauer-Buschke-Fischer keratoderma (BBFK) is a rare autosomal dominant keratinisation disorder with variable penetrance. \r\n The emergence of acral lentiginous melanoma on palmoplantar keratoderma is rarely reported. Herein, we present a case of a 53-year-old woman with a history of BBFK in both palms and soles, who developed an acral lentiginous melanoma. The clinical examination showed multiple tiny hyperkeratotic and translucent papules on both palms and soles. On the right sole, she developed an acral lentiginous melanoma over a hyperkeratoic area. This case presentation illustrates a rare association of malignant melanoma and BBFK and seeks to enhance further investigations to determine its pathophysiological mechanism.\r\n