Fractures: Bado classification of Monteggia: 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 · Fractures: Bado classification of Monteggia

Sample item

In the Bado classification of Monteggia fracture-dislocations, which type is the most common?

AType IV: radial head dislocation with fractures of both radius and ulnaBType III: lateral dislocation of the radial headCType I: anterior dislocation of the radial head with an ulnar shaft fracture angulated anteriorlyDType II: posterior dislocation of the radial head

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

The answer and the reasoning

C. Type I: anterior dislocation of the radial head with an ulnar shaft fracture angulated anteriorly

Monteggia fracture is a fracture of the proximal ulna with dislocation of the radial head. Bado type I, with anterior radial head dislocation, is the commonest, especially in children.

Option by option

A. Type IV: radial head dislocation with fractures of both radius and ulna
Type IV, with a radius fracture added, is the rarest.
B. Type III: lateral dislocation of the radial head
Type III is lateral and occurs mainly in children but is less frequent than type I.
C. Type I: anterior dislocation of the radial head with an ulnar shaft fracture angulated anteriorly (correct)
Correct. Type I is the most frequent pattern.
D. Type II: posterior dislocation of the radial head
Type II is posterior and is uncommon, seen more in older adults.

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 C, Type I: anterior dislocation of the radial head with an ulnar shaft fracture angulated anteriorly. Monteggia fracture is a fracture of the proximal ulna with dislocation of the radial head.

Why is "Type IV: radial head dislocation with fractures of both radius and ul…" not the answer?

Type IV, with a radius fracture added, is the rarest.

Why is "Type III: lateral dislocation of the radial head" not the answer?

Type III is lateral and occurs mainly in children but is less frequent than type I.

Why is "Type II: posterior dislocation of the radial head" not the answer?

Type II is posterior and is uncommon, seen more in older adults.

What concept does this question test?

It tests Fractures: Bado classification of Monteggia in Orthopaedics. Bado type I, with anterior radial head dislocation, is the commonest, especially in children.

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 Fractures: Bado classification of Monteggia?

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.