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Sunday, December 07, 2008

Anatomy MCQ 005

Sunday, December 07, 2008

An infant born to a mother who used retinoid-based anti-acne medications during early pregnancy, exhibits bilateral cleft lip. The most likely cause of the anomaly was retinoic acid-mediated reduction of mesenchymal proliferation in which of the following structures?

A. Lateral nasal process

B. Intermaxillary process

C. Mandibular Swellings

D. Second pharyngeal arch

E. Third pharyngeal arch



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