Figure 2. Myofibroblasts in human peritoneal adhesion biopsies and cultured fibroblasts. Immunostaining for the characterization of myofibroblast was performed with antihuman α-SMA antibody (original magnification ×200). (A) Pronounced myofibroblast hyperplasia was observed by the positive staining with α-SMA antibody. (B) Fibroblasts obtained from human peritoneal adhesion explant cultures are mostly myofibroblasts because of their positive staining with α-SMA. Counterstained with hematoxylin.