Paediatric orthopaedics: Herring lateral pillar group B: 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: Herring lateral pillar group B

Sample item

In the Herring lateral pillar classification of Perthes disease, which description corresponds to group B?

ANo change in lateral pillar height or densityBSome density loss, with more than half the pillar height keptCLess than half the lateral pillar height maintainedDComplete loss of the lateral pillar with flattening

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

The answer and the reasoning

B. Some density loss, with more than half the pillar height kept

Herring group A shows no loss of lateral pillar height, group B shows loss of density with more than 50 percent of the original height maintained, and group C shows less than 50 percent of the height maintained. Prognosis worsens from A to C.

Option by option

A. No change in lateral pillar height or density
A normal pillar height and density describes group A.
B. Some density loss, with more than half the pillar height kept (correct)
Correct. Group B keeps more than half of the lateral pillar height.
C. Less than half the lateral pillar height maintained
Less than half of the height describes group C.
D. Complete loss of the lateral pillar with flattening
Complete loss of the pillar is not one of the three groups.

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, Some density loss, with more than half the pillar height kept. Herring group A shows no loss of lateral pillar height, group B shows loss of density with more than 50 percent of the original height maintained, and group C shows less than 50 percent of the height maintained.

Why is "No change in lateral pillar height or density" not the answer?

A normal pillar height and density describes group A.

Why is "Less than half the lateral pillar height maintained" not the answer?

Less than half of the height describes group C.

Why is "Complete loss of the lateral pillar with flattening" not the answer?

Complete loss of the pillar is not one of the three groups.

What concept does this question test?

It tests Paediatric orthopaedics: Herring lateral pillar group B in Orthopaedics. Prognosis worsens from A to C.

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: Herring lateral pillar group B?

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.