A 4-Hour-Old Child with a Cleft Lip Is Successfully Nursing

A 4-hour-old child with a cleft lip is successfully nursing. The baby was delivered vaginally following a straightforward pregnancy and delivery. At 20 weeks gestation, routine prenatal sonography revealed no abnormalities. Physical examination reveals a palate that is intact and a unilateral cleft lip on the left side. There are no additional abnormalities found. Which of the following intrauterine procedures failed to result in this child's cleft lip?

A) Fusion of the 2 medial nasal prominences
B) Fusion of the maxillary prominence and intermaxillary segment
C) Fusion of the palatal processes
D) Hyperplasia of the frontonasal prominence
E) Hypoplasia of the mandibular prominence

Correct Answer:

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