Neuro-ophthalmology and pupils: morning glory disc anomaly: practice question

A Ophthalmology 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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Ophthalmology · Neuro-ophthalmology and pupils: morning glory disc anomaly

Sample item

A child has poor vision in one eye. The optic disc is enlarged and funnel-shaped with a central white glial tuft and retinal vessels radiating like spokes. Which associated condition should be looked for?

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

The answer and the reasoning

C. Basal encephalocele

Morning glory disc anomaly is a congenital excavation of the optic disc that can be associated with a transsphenoidal basal encephalocele and with carotid anomalies such as moyamoya, so MRI and MRA of the brain are advised.

Option by option

  • A. Papillorenal syndrome with renal hypoplasia

    Papillorenal syndrome is associated with optic disc dysplasia and renal hypoplasia, a different disc picture.

  • B. Optic pathway glioma

    Optic pathway glioma is associated with neurofibromatosis type 1.

  • C. Basal encephalocele (correct)

    Correct. Basal encephalocele is the key association to exclude.

  • D. Intracranial calcification

    Intracranial calcification is a feature of tuberous sclerosis or congenital infection.

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.

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Questions about this Ophthalmology question

What is the answer to this Ophthalmology question?

The best answer is C, Basal encephalocele. Morning glory disc anomaly is a congenital excavation of the optic disc that can be associated with a transsphenoidal basal encephalocele and with carotid anomalies such as moyamoya, so MRI and MRA of the brain are advised.

Why is "Papillorenal syndrome with renal hypoplasia" not the answer?

Papillorenal syndrome is associated with optic disc dysplasia and renal hypoplasia, a different disc picture.

Why is "Optic pathway glioma" not the answer?

Optic pathway glioma is associated with neurofibromatosis type 1.

Why is "Intracranial calcification" not the answer?

Intracranial calcification is a feature of tuberous sclerosis or congenital infection.

What concept does this question test?

It tests Neuro-ophthalmology and pupils: morning glory disc anomaly in Ophthalmology. The correct option holds because: Correct. Basal encephalocele is the key association to exclude.

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 Neuro-ophthalmology and pupils: morning glory disc anomaly?

Group the red eye by what to examine and what the pupil does. Then use the flashcards and the other Ophthalmology 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.