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Radiology · single question

A small reddish nodule appears on the facial vestibule next to tooth #9 and intermittently drains. This 'parulis' represents:

  1. The opening of a sinus tract from a chronic periapical infection
  2. A benign salivary gland tumor
  3. An irritation fibroma
  4. A mucocele
Show answer and explanation

Correct answer: A. The opening of a sinus tract from a chronic periapical infection

  • A. Correct. A parulis (gum boil) is the soft-tissue terminus of a sinus tract draining a chronic apical abscess of a non-vital tooth.
  • B. Incorrect. Salivary tumors do not drain and are not tied to a non-vital tooth apex.
  • C. Incorrect. A fibroma is a firm, non-draining reactive lesion.
  • D. Incorrect. A mucocele is a mucus-filled bluish swelling, typically of the lower lip, not a draining tract from a tooth.

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