Figure 1From: Constrictive pleuropericarditis: a dominant clinical manifestation in Whipple’s disease Pericardial biopsy. There is dense hyalinized fibroconnective tissue (panel A, 40 ×, hematoxylin-eosin stain) with focal minimal chronic inflammation (panel B, 400 ×, hematoxylin-eosin). Immunostaining with antibodies to Tropheryma whipplei was positive in the cellular infiltrates (panel C, 400 ×, Tropheryma whipplei immunostain).Back to article page