PAS-positive macrophages on microscopy

PAS-positive macrophages in the small intestine of an untreated patient with Whipple's disease.

PAS: Periodic acid-Schiff.

Reproduced with permission from: Schneider T, Zeitz M. [Illness and immune manifestations in Whipple disease. Differential rheumatic diseases diagnosis] Internist (Berl) 2003; 44:184. Copyright © 2003 Springer-Verlag.

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