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Macroscopic and pathological observations of the tumors. (A) Macroscopic images of the tumors in the pulmonary artery (left panel) and the right ventricle (right panel). Bar = 1 cm. (B) Hematoxylin and eosin-staining of the tumor. Bar = 50 μm. (C) Immunohistochemical staining for desmin. Bar = 50 μm. (D) Immunohistochemical staining for myogenin. Bar = 50 μm.
