Cutaneous verrucous xanthoma in a bone marrow transplant recipient with recessive dystrophic epidermolysis bullosa.

Verrucous xanthomas (VXs) typically arise on the oral mucosa but have been reported on glabrous skin in patients with graft-versus-host disease or recessive dystrophic epidermolysis bullosa (RDEB). The inciting cause of these tumors is unclear but may result from cutaneous inflammation and trauma. We describe a patient with RDEB who had previously undergone a bone marrow transplant for her condition and subsequently developed an VX on her neck.