PMC6332983_01
(a-c) The broad band of a transparent membrane-like material firmly attached to twin A's lower truncus. (a) Ventral view after birth. (b) Transparent membrane. (c) Right side view on autopsy.
CRIPE2018-4549060.001.jpg
PMC6332983_01_CRIPE2018-4549060.001.jpg
fig1
Twin A showed a broad band of a transparent membrane-like material firmly attached to her lower abdomen (Figure 1(a)). A showed signs of intrauterine growth restriction with body dimensions appropriate for 30-32 weeks of gestation. A broad band of a transparent membrane was found firmly attached in a circumferential severe stricture on the lower trunk at the level of the back, hips, and lower abdomen (Figures 1(b) and 1(c)).
Histopathological examination of a roll of the transparent membrane showed double amnion layer (long arrows) without chorion, consistent with monochorionic diamniotic pregnancy. On one side, there was amnion nodosum (short arrow) consistent with oligohydramnios.
CRIPE2018-4549060.002.jpg
PMC6332983_01_CRIPE2018-4549060.002.jpg
fig2
The attached band-like material was identified as the dividing membrane of the MCDA pregnancy, on one side displaying amnion nodosum as a sign of oligohydramnios (Figure 2).