Paediatric: congenital pseudarthrosis of the tibia: 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 · Paediatric: congenital pseudarthrosis of the tibia

Sample item

A 1-year-old child has anterolateral bowing of the tibia, which later fractures and fails to heal. Which condition is most commonly associated?

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

The answer and the reasoning

A. Neurofibromatosis type 1

Congenital pseudarthrosis of the tibia presents with anterolateral bowing and fracture at the junction of the middle and distal thirds, and about half of cases are associated with neurofibromatosis type 1. Union is notoriously difficult to achieve.

Option by option

  • A. Neurofibromatosis type 1 (correct)

    Correct. NF1 is the commonest associated condition.

  • B. Rickets

    Rickets produces symmetrical bowing and not pseudarthrosis.

  • C. Achondroplasia

    Achondroplasia is not associated.

  • D. Osteogenesis imperfecta

    OI causes fragility fractures but not this pattern.

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 A, Neurofibromatosis type 1. Congenital pseudarthrosis of the tibia presents with anterolateral bowing and fracture at the junction of the middle and distal thirds, and about half of cases are associated with neurofibromatosis type 1.

Why is "Rickets" not the answer?

Rickets produces symmetrical bowing and not pseudarthrosis.

Why is "Achondroplasia" not the answer?

Achondroplasia is not associated.

Why is "Osteogenesis imperfecta" not the answer?

OI causes fragility fractures but not this pattern.

What concept does this question test?

It tests Paediatric: congenital pseudarthrosis of the tibia in Orthopaedics. Union is notoriously difficult to achieve.

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 Paediatric: congenital pseudarthrosis of the tibia?

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.