Which epithelium-lined tract is a developmental anomaly located in the corners of the mouth?

Question

Quizplus · Accepted Answer

Commissural lip pits are epithelium-lined blind tracts located in the corners of the mouth. Angular cheilitis is often caused by Candida organisms. It appears as erythema or fissuring at the labial commissures. A fistula is a drainage tract from an area of infection. A congenital lip pit occurs near the midline of the vermilion border of the lip, and it appears as a depression.

Which Epithelium-Lined Tract Is a Developmental Anomaly Located in the Corners