Bone tumours: 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

Sample item

A teenager has knee pain and a radiograph around the distal femur showing a sunburst periosteal reaction and Codman's triangle. What is the likely diagnosis?

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

The answer and the reasoning

D. Osteosarcoma

Osteosarcoma is the commonest primary malignant bone tumour in adolescents, usually at the metaphysis around the knee. Sunburst pattern and Codman's triangle are classical.

Option by option

  • A. Ewing sarcoma

    Ewing sarcoma gives an onion-peel reaction in the diaphysis.

  • B. Giant cell tumour

    Giant cell tumour is eccentric and lytic in the epiphysis of adults.

  • C. Osteochondroma

    Osteochondroma is a benign bony outgrowth with a cartilage cap.

  • D. Osteosarcoma (correct)

    Correct.

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, Osteosarcoma. Osteosarcoma is the commonest primary malignant bone tumour in adolescents, usually at the metaphysis around the knee.

Why is "Ewing sarcoma" not the answer?

Ewing sarcoma gives an onion-peel reaction in the diaphysis.

Why is "Giant cell tumour" not the answer?

Giant cell tumour is eccentric and lytic in the epiphysis of adults.

Why is "Osteochondroma" not the answer?

Osteochondroma is a benign bony outgrowth with a cartilage cap.

What concept does this question test?

It tests Bone tumours in Orthopaedics. Sunburst pattern and Codman's triangle are classical.

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 Bone tumours?

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.