Oral pathology: cysts and odontogenic tumours: Rushton bodies: 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 · Oral pathology: cysts and odontogenic tumours: Rushton bodies

Sample item

Histology of the epithelial lining of a cyst at the apex of a non-vital tooth shows linear and curved eosinophilic hyaline bodies within the epithelium. What are these?

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

The answer and the reasoning

A. Rushton hyaline bodies

Rushton bodies are eosinophilic hyaline structures found in the lining of about 10 percent of radicular cysts and occasionally other odontogenic cysts. Their origin is uncertain, and they are not diagnostic on their own.

Option by option

  • A. Rushton hyaline bodies (correct)

    Correct. Linear or curved hyaline bodies in the lining are Rushton bodies.

  • B. Civatte bodies

    Civatte bodies are apoptotic keratinocytes in the basal layer in lichen planus.

  • C. Liesegang rings

    Liesegang rings are concentric calcified structures in the Pindborg tumour.

  • D. Psammoma bodies

    Psammoma bodies are concentric calcifications seen in meningioma and papillary carcinomas.

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 A, Rushton hyaline bodies. Rushton bodies are eosinophilic hyaline structures found in the lining of about 10 percent of radicular cysts and occasionally other odontogenic cysts.

Why is "Civatte bodies" not the answer?

Civatte bodies are apoptotic keratinocytes in the basal layer in lichen planus.

Why is "Liesegang rings" not the answer?

Liesegang rings are concentric calcified structures in the Pindborg tumour.

Why is "Psammoma bodies" not the answer?

Psammoma bodies are concentric calcifications seen in meningioma and papillary carcinomas.

What concept does this question test?

It tests Oral pathology: cysts and odontogenic tumours: Rushton bodies in Dentistry. Their origin is uncertain, and they are not diagnostic on their own.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. 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 Oral pathology: cysts and odontogenic tumours: Rushton bodies?

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.