IV. Über kongenitale Defekte am Schädel infolge amniotischer Verwachsungen

Invited commentary

“…In numerous cases the edges were pink-white and hairless, but in some they were densely haired. Also, a lock of hair of unusual length that grew from the margin of the lesion was observed by Kehrer [26]. Dilated and tortuous veins adjacent to large defects on the scalp were reported in a few patients [3,15,37,42].…”

“…The defect may involve only skin or the skin, subcutaneous tissue and muscle. On the head, lack of tissue may extend down to dura [26]; in this situation the name aplasia cutis congenita is insufficient. A superficial defect involving only epidermis is observed as erosion.…”

Localized Congenital Defects of the Scalp

“…The earlier theories favoured amniotic adhesions as a cause (Kehrer, 1910). In discussing intra-uterine amputations in general, Streeter (1930) concluded that amniotic bands do exist and are sometimes associated with malformations, but, where this has occurred, the two had participated in the same disturbance and the latter were not mechanically produced by the former.…”

“…In this circular type of defect, the lesion is usually confined to the skin (Abt, 1917;Anderson and Novy, 1942;Calloway et al, in this case) and may penetrate to the dura (Kehrer, 1910 1930). In a case described by Terruhn, the defect was symmetrical and extended through the skin, periosteum and bone to the cerebral membranes and allowed the convolutions of the brain to be clearly seen.…”