Dental materials and radiology: Garre osteomyelitis: practice question

A Dentistry question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Dentistry · Dental materials and radiology: Garre osteomyelitis

Sample item

A 10-year-old with a carious lower first molar has a hard bony swelling of the lower jaw border. A radiograph shows layered periosteal new bone. What is the diagnosis?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

C. Chronic osteomyelitis with proliferative periostitis (Garre)

Garre osteomyelitis is a proliferative periostitis in young patients from a low-grade infection, usually a carious tooth, and gives an onion-skin periosteal reaction. Treating the source usually leads to resolution.

Option by option

  • A. Ewing sarcoma

    Ewing sarcoma can show onion-skin change but presents with systemic features and no odontogenic source.

  • B. Osteosarcoma

    Osteosarcoma gives a sunray rather than onion skin pattern.

  • C. Chronic osteomyelitis with proliferative periostitis (Garre) (correct)

    Correct. An onion-skin periosteal reaction in a child with an infected tooth indicates Garre.

  • D. Cherubism

    Cherubism is bilateral multilocular and painless without odontogenic infection.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

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Questions about this Dentistry question

What is the answer to this Dentistry question?

The best answer is C, Chronic osteomyelitis with proliferative periostitis (Garre). Garre osteomyelitis is a proliferative periostitis in young patients from a low-grade infection, usually a carious tooth, and gives an onion-skin periosteal reaction.

Why is "Ewing sarcoma" not the answer?

Ewing sarcoma can show onion-skin change but presents with systemic features and no odontogenic source.

Why is "Osteosarcoma" not the answer?

Osteosarcoma gives a sunray rather than onion skin pattern.

Why is "Cherubism" not the answer?

Cherubism is bilateral multilocular and painless without odontogenic infection.

What concept does this question test?

It tests Dental materials and radiology: Garre osteomyelitis in Dentistry. Treating the source usually leads to resolution.

How hard is this question?

We tag it as a multi-step question: it asks you to combine more than one idea. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Dental materials and radiology: Garre osteomyelitis?

Learn the dental formula, eruption ages and tooth structure once, as tables. Then use the flashcards and the other Dentistry questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.