A compound odontoma on X-ray is classified as which type of lesion?

Correct answer: D. Hamartoma (normal tissue components in abnormal arrangement — not neoplastic)

• A. Neoplasms have autonomous uncontrolled growth — odontomas are self-limiting hamartomatous malformations.
• B. A choristoma is normal tissue in an abnormal location (e.g., gastric mucosa in Meckel's diverticulum) — different from odontoma.
• C. A teratoma is a germ cell tumor containing tissues from multiple germ layers (including hair, skin, teeth) — different from odontoma.
• D. Correct. Odontomas are classified as HAMARTOMAS — malformations of normal dental tissues (enamel, dentin, cementum, pulp) in an abnormal arrangement. A compound odontoma contains multiple tooth-like structures (denticles) arranged in an orderly fashion; a complex odontoma is a disorganized mass. Neither is a true neoplasm.