Diaphragmatic endometriosis

(A) Intraoperative view onto tendinous part of right diaphragm in patient 1. Multiple perforations, ranging from 1 to 3 mm, were found.
(B) After elevation of diaphragm, convex apical surface of liver can be observed.
(C) Section of diaphragm in patient 2 shows focal full thickness defect consisting of cellular stroma with numerous hemosiderin-laden macrophages and sparse chronic inflammatory infiltrate. Epithelial strands extend into depth of stroma. Immunohistochemical stains were positive for CD10 within the stroma, supporting diagnosis of endometriosis.