Background. Congenital skin defect is an uncommon condition. The term
of ''congenital skin aplasia'' should be avoided since the origin may
not necessarily be congenital malformation. The scalp is involved in 8
0 p. 100 of the cases. Case report. We observed a congenital skin defe
ct located exclusively on the trunk. The infant lacked wide areas of s
kin in symmetrical star-like configurations. Discussion. The notion of
a twin expulsed after 4 months gestation suggested the diagnosis of c
ongenital skin defect and fetus papyraceus or group V congenital skin
aplasia in the Frieden classification as recalled. This diagnosis must
not be overlooked as the prognosis is good. Closure with atrophic ski
n usually occurs within a few weeks. The etiopathogenesis remains obsc
ure.