Paediatric orthopaedics: Waldenstrom stages: 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.

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Orthopaedics · Paediatric orthopaedics: Waldenstrom stages

Sample item

In the radiographic course of Legg-Calve-Perthes disease, which sequence of Waldenstrom stages is correct?

AResidual, initial, fragmentation, reossificationBInitial, fragmentation, reossification, residualCReossification, initial, fragmentation, residualDFragmentation, initial, residual, reossification

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

The answer and the reasoning

B. Initial, fragmentation, reossification, residual

Waldenstrom described four stages. The initial stage shows a small dense epiphysis with widened joint space, followed by fragmentation with resorption, reossification as new bone forms, and finally the residual stage with a healed deformed head. The whole course lasts several years.

Option by option

A. Residual, initial, fragmentation, reossification
The residual stage is the last stage, not the first.
B. Initial, fragmentation, reossification, residual (correct)
Correct. This is the natural order of the four stages.
C. Reossification, initial, fragmentation, residual
Reossification follows fragmentation and cannot be the first stage.
D. Fragmentation, initial, residual, reossification
Fragmentation does not precede the initial stage.

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.

Questions about this Orthopaedics question

What is the answer to this Orthopaedics question?

The best answer is B, Initial, fragmentation, reossification, residual. Waldenstrom described four stages.

Why is "Residual, initial, fragmentation, reossification" not the answer?

The residual stage is the last stage, not the first.

Why is "Reossification, initial, fragmentation, residual" not the answer?

Reossification follows fragmentation and cannot be the first stage.

Why is "Fragmentation, initial, residual, reossification" not the answer?

Fragmentation does not precede the initial stage.

What concept does this question test?

It tests Paediatric orthopaedics: Waldenstrom stages in Orthopaedics. The initial stage shows a small dense epiphysis with widened joint space, followed by fragmentation with resorption, reossification as new bone forms, and finally the residual stage with a healed deformed head. The whole course lasts several years.

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 Paediatric orthopaedics: Waldenstrom stages?

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.