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  1. 2019New_Mesh_Tree_Hierarchy.txt 
    https://www.nlm.nih.gov/.../download/2019New_Mesh_Tree_Hierarchy.txt
    ... 800 Smooth Muscle Tumor C04.557.450.692 Perivascular Epithelioid Cell Neoplasms C04.557.450.692.249 Angiomyolipoma C04.557. ... 390 Hemangiosarcoma C04.557.450.795.400 Histiocytoma, Malignant Fibrous C04.557.450.795.455 Leiomyosarcoma C04. ...