[Cutis "trunci variata." A new genetic dermatosis].

A maculo-hypochromic condition is not rarely seen in brown-skinned adolescents and young adults, that may spread over the skin of the trunk, specially the lumbar, sacral and epigastric regions assuming a considerable psychologic important. It is generally confused with pityriasis versicolor or its hypochromic sequelae. The histologic and genetic study of the condition remains undone. It is provisionally considered among genodermatoses and the name cutis trunci variata is being proposed for it.