Figure 2

Histological features of fACM and dbACM; (a) H&E staining and (b) Mason’s trichrome staining of fACM; (c) IHC staining for collagen type IV in fACM; (d) H&E staining dbACM; (e) Mason’s trichrome staining of dbACM; (f) IHC staining for collagen type IV in dbACM; (black arrow: epithelial cells, black brace: trophoblasts, green arrow: amniotic basement membrane, blue arrow: chorionic basement membrane).