Fig. 5

Pathological subtypes of pleural-based mass. A Granulomatous inflammation type: composed of inflammatory cells, epithelioid histiocytes, Langhans giant cells and necrosis. HE stain, *100. B Fibrous hyperplasia type: lesion mainly consisted of fibroblasts and fibrous proliferation. HE stain, *40. C Collagen has been stained to blue, in the same case of B. Masson trichrome stain, *40. D Necrosis type: necrosis was dominantly occupied in the lesion. HE stain, *400