Figure 1: Photomicrographs demonstrating histopathological fidingsparietal peritoneal biopsy reported the presence of tissue calcifications. (A) Positive control of Von Kossa staining (internal controls) (A), control case: normal peritoneum (B), case of acute peritonitis (Case control N° 3; C) and Case of encapsulating peritoneal sclerosis (EPS) (A) Abnormal calcifications in vessel vascular corresponded to intimal calcinosis. (B-C) Absence of vascular calcifications.(D) Von Kossa coloration demonstrating calcifications in media of vessels; in this method tissue section were treated with a sliver nitrate solution and the silver is deposited by replacing the calcium reduced by the strong light, and thereby visualized as metallic (black) sliver. (A-D)Von Kossa staining. Original magnifications :A-B-C: 20X et D : 40x.