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Ophthalmology · Orbit: rhabdomyosarcoma
Sample itemA 7-year-old child has rapidly progressive unilateral proptosis with a downward displaced globe. What is the likely tumour?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
A. Rhabdomyosarcoma
Rhabdomyosarcoma is the commonest primary malignant orbital tumour of childhood, with rapid onset proptosis. Treatment is chemotherapy and radiotherapy after biopsy, and the embryonal type has a favourable prognosis.
Option by option
A. Rhabdomyosarcoma (correct)
Correct. Rapid proptosis in a child suggests this tumour.
B. Optic glioma
Optic glioma causes axial proptosis, slowly.
C. Lacrimal gland adenoma
Lacrimal gland adenoma occurs in adults.
D. Neuroblastoma only
Metastatic neuroblastoma can cause proptosis with ecchymosis but is less typical.
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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