title: Problems raised by the simultaneous or consecutive appearance of two or more neoplastic diseases or signs in haematopoietic tissue. Systemic-tending hystiocytic sarcomatosis.
mesh_terms: D001855:Bone Marrow Diseases / Q000150:complications*; D001856:Bone Marrow Examination; D006689:Hodgkin Disease / Q000150:complications; D006801:Humans; D007938:Leukemia / Q000150:complications*; D008223:Lymphoma / Q000150:complications*; D008228:Lymphoma, Non-Hodgkin / Q000150:complications; D009378:Neoplasms, Multiple Primary; D012509:Sarcoma / Q000150:complications*