Bone tumours: adamantinoma: practice question

A Orthopaedics 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.

Try it

Orthopaedics · Bone tumours: adamantinoma

Sample item

A young adult has a slowly growing, multilocular lytic lesion in the anterior cortex of the mid-tibial diaphysis. What is the most likely diagnosis?

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

The answer and the reasoning

D. Adamantinoma

Adamantinoma is a rare low-grade malignant tumour occurring almost exclusively in the tibial diaphysis, with epithelial islands in a fibrous stroma. It is related to osteofibrous dysplasia and treated with wide resection.

Option by option

  • A. Chordoma

    Chordoma arises in the sacrum or clivus.

  • B. Giant cell tumour

    Giant cell tumour is epiphyseal.

  • C. Osteosarcoma

    Osteosarcoma is typically metaphyseal and more aggressive.

  • D. Adamantinoma (correct)

    Correct. A cortical tibial diaphyseal lesion is typical of adamantinoma.

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.

More Orthopaedics questions

Questions about this Orthopaedics question

What is the answer to this Orthopaedics question?

The best answer is D, Adamantinoma. Adamantinoma is a rare low-grade malignant tumour occurring almost exclusively in the tibial diaphysis, with epithelial islands in a fibrous stroma.

Why is "Chordoma" not the answer?

Chordoma arises in the sacrum or clivus.

Why is "Giant cell tumour" not the answer?

Giant cell tumour is epiphyseal.

Why is "Osteosarcoma" not the answer?

Osteosarcoma is typically metaphyseal and more aggressive.

What concept does this question test?

It tests Bone tumours: adamantinoma in Orthopaedics. It is related to osteofibrous dysplasia and treated with wide resection.

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 Bone tumours: adamantinoma?

Pair each fracture with its classic complication and nerve injured. Then use the flashcards and the other Orthopaedics 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.