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Microbiology · Parasitology: hyperreactive malarial splenomegaly
Sample itemA woman from a hyperendemic malaria area has massive splenomegaly, anaemia and very high serum IgM. Smears show no parasites, and the liver biopsy shows sinusoidal lymphocytosis. Which treatment is most suitable?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
C. Long-term antimalarial prophylaxis
This picture is hyperreactive malarial (tropical) splenomegaly, an exaggerated immune response to repeated malaria with high IgM and few or no parasites. It responds to prolonged antimalarial prophylaxis, and the spleen gradually shrinks.
Option by option
A. Splenectomy as first-line treatment
Splenectomy is not first-line and exposes the patient to overwhelming infection.
B. High-dose corticosteroids
Corticosteroids do not treat the underlying immune stimulation and are not indicated.
C. Long-term antimalarial prophylaxis (correct)
Correct. Prolonged antimalarial therapy or prophylaxis reduces the antigenic drive and the spleen regresses.
D. Antituberculous therapy
Nothing in this picture suggests tuberculosis, so antituberculous therapy is unwarranted.
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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