Figure 4From: Radiofrequency-induced thermotherapy of nasopharyngeal angiofibroma and immunohistochemical analysis of vessel proliferation: a case report Proliferation of pericytes in angiofibroma. (A) Prior to radiofrequency-induced thermotherapy. (B) Three weeks after radiofrequency-induced thermotherapy. (C) Ten months after radiofrequency-induced thermotherapy, detachment of pericytes from the vessel wall. Magnification ×20. Ki67/SMA double immunohistochemistry. Ki67-positive nuclei of cycling cells were visualized using ChemMate DAB+ Chromogen. Cytoplasm of the endothelial cells and pericytes was visualized by fast red staining.Back to article page