“…Thus, it does not require exhaustive investigations. Spontaneous involution seems more frequent than it was commonly believed [1, 4, 18] (54% vs. 83% in JXG), with a mean duration of 22 months; therefore, aggressive treatment should be avoided. The main differential diagnosis is with PX, which has the same clinical feature and evolution as AXG, occurring after young adolescence, in solitary or multiple form, with no extracutaneous localization except for mucosal involvement, and frequent spontaneous involution.…”