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MBBS QUESTION #10171
Question 1
Cleft lip most commonly results from failure of fusion between which two embryological facial processes?
  • Maxillary process and lateral nasal process
  • Maxillary process and medial nasal process✔️
  • The two mandibular processes
  • The two medial nasal processes with each other
Correct Answer Explanation
Cleft lip results from failure of fusion of the maxillary process with the medial nasal process, which together normally form the upper lip and primary palate; failure of maxillary-lateral nasal process fusion instead causes an oblique facial cleft.