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Immunohistochemical study of heart tumors. (A–D) Expression of spike ARS-CoV-2 in myxoma, papillary fibroelastoma, myxofibrosarcoma in the dedifferentiated zone of Grade 3 chondrosarcoma. (E–G) CD68+ macrophages in papillary fibroelastoma, classical myxoma and proliferating myxoma. (H) CD34+ cells in proliferating myxoma; ×200.
