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Meckel-Gruber syndrome fetal malformations (photomicrograph)

(a) Herniation of rhombic roof through posterior fontanelle, (b) rhombencephalic dysgenesis, (c) prosencephalic dysgenesis, (d) rostral prechordal abnormal induction, (e) large abdomen, (f) polydactyly, (g) caudal incomplete mesodermal induction. (Contributed by Dr. Mamdouha Ahdab-Barmada.)

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