J Clin Aesthet Dermatol 2019 Jan 1;12(1):38-46. Epub 2019 Jan 1.
Dr. Udompanich and Dr. Vachiramon are with the Division of Dermatology, Faculty of Medicine Ramathibodi Hospital, Mahidol University in Bangkok, Thailand.
is a new umbrella term that encompasses a group of diseases that, while having similar clinical and histological features, their true entities are controversial, and a global consensus regarding these conditions is still lacking. The conditions comprised by the term are ashy dermatosis, erythema dyschromicum perstans, lichen planus pigmentosus, and idiopathic eruptive macular pigmentation. In this review, we compare the clinical and histological features of these conditions that comprise aquired macular pimgentation of unknown etiology, as well as review their responses to treatment.