An occlusal radiograph shows buccolingual cortical expansion of the jaw with a multilocular appearance. Which benign but locally aggressive odontogenic tumor should be considered?

Correct answer: A. Ameloblastoma

• A. Correct. Ameloblastoma is the classic benign but locally aggressive odontogenic tumor causing cortical expansion and a multilocular 'soap-bubble' appearance.
• B. Incorrect. A periapical abscess is a localized apical radiolucency, not an expansile multilocular tumor.
• C. Incorrect. A simple bone cyst is a non-expansile radiolucency that scallops between roots.
• D. Incorrect. Condensing osteitis is a focal radiopacity, not an expansile radiolucency.

Note: Ossifying fibroma (a well-demarcated expansile fibro-osseous lesion) is also in the differential for jaw expansion; ameloblastoma is the keyed odontogenic answer.