[Atrophic zoniform nevus].

The first, in our knowledge, case of naevus atrophicus zoniforme in italian literature is here reported. A 13 year old girl had a thirteen years history of involved numerous depressed areas of skin of the right anterior region of the chest and of the right upper arm. The lesions were round, grey-bluish, smooth, depressed, completely asymptomatic. No inflammatory changes were noticed in affected patches nor in surrounding normal skin. The histologic changes were compatible with dermal atrophy: epidermis was quite normal; dermis war very thin; the thickness of hypodermis was increased. Some large nervous structures were visible within deep dermis. Histochemical changes mainly involved elastic fibers, whose thickness was considerably increased. The diagnosis of naevus atrophicus zoniforme is discussed, in comparison to other idiopathic atrophies. In conclusion, the main characters of naevus atrophicus zoniforme, according to literature data, are confirmed in our case: 1) congenital appearance 2) zoniforme distribution 3) dermal atrophy 4) thickening of elastic fibers 5) occurrence of large nervous structures in the dermis.