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Pathology · Neoplasia: WHO neuroblastoma prognosis
Sample itemA 2-year-old has an abdominal mass and opsoclonus-myoclonus. The tumour biopsy shows small round blue cells with Homer-Wright rosettes. Which finding indicates the worst prognosis?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
D. MYCN amplification
MYCN amplification in neuroblastoma indicates aggressive disease whatever the stage. Favourable features include young age, hyperdiploidy and differentiation.
Option by option
A. Presence of ganglion cell maturation
Ganglion cell maturation indicates a more differentiated, favourable tumour.
B. Age under 18 months
Age under 18 months is linked with a better outcome.
C. Hyperdiploidy
Hyperdiploidy is a favourable feature in young children.
D. MYCN amplification (correct)
Correct. MYCN amplification is the key adverse marker.
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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