Histiocytosis, malignant
A term sometimes used to refer to a group of tumors including monocyte-related leukemias (for example, acute monocytic leukemia, acute myelomonocytic leukemia), extramedullary monocytic tumor, and histiocytic sarcoma. Treatment is by radiation and chemotherapy, and in some cases bone-marrow transplantation.
See also histiocytosis.
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- Histiocytosis, sinus
A type of histiocytosis in which the lymph nodes are the main site of histiocyte proliferation. The sinuses of the lymph nodes become filled with and distended by masses of histiocytes.
- Histo
1. Popular name for the fungus histoplasma. 2. Medical school slang for histology.
- Histo spot
A small circular punched-out spot in the retina at a site where spores of the fungus histoplasma (histo) seeded in the eye. Histo spots may be multiple, found in both eyes, and scattered throughout the retina. Histo spots in the macula are significant since they may stimulate the growth of abnormal new blood vessels located […]
- Histo-
Tissue. As in histocompatible (tissue compatible) and histology (the study of tissues, especially under the microscope).
- Histocompatible
Literally, tissue compatible, meaning that the tissue can exist together with tissue of another organism without the immune system rejecting it. If a tissue donor and tissue recipient are histocompatible, a transplant is expected to be easily accepted.