| lymphoma, T-cell | A group of heterogeneous lymphoid tumours representing malignant transformations of T-lymphocytes. (12 Dec 1998) |
|---|---|
| lymphoma, T-cell, cutaneous | A group of lymphomas exhibiting clonal expansion of malignant T-lymphocytes arrested at varying stages of differentiation as well as malignant infiltration of the skin. Mycosis fungoides and sezary syndrome are the best characterised of these disorders. (12 Dec 1998) |
| lymphoma, T-cell, peripheral | A group of malignant lymphomas thought to derive from peripheral T-lymphocytes in lymph nodes and other nonlymphoid sites. They include a broad spectrum of lymphocyte morphology, but in all instances express T-cell markers admixed with epithelioid histiocytes, plasma cells, and eosinophils. Although markedly similar to large-cell immunoblastic lymphoma (lymphoma, large-cell, immunoblastic), this group's unique features warrant separate treatment. (12 Dec 1998) |
| lymphoma, undifferentiated | A form of lymphoma in which relatively large stem cells with large nuclei, pale, scanty cytoplasm, and indistinct borders are predominant. The cells are undifferentiated, i.e., show no morphologic evidence of maturation toward lymphocytes or histiocytes. (12 Dec 1998) |
| lymphomatoid | Resembling a lymphoma. (05 Mar 2000) |
| lymphomatoid granulomatosis | An angiocentric and angiodestructive lymphoreticular proliferative disorder primarily involving the lungs. Histologically it simulates malignant lymphoma and in some cases may progress to lymphoma. (12 Dec 1998) |
| lymphomatoid papulosis | Clinically benign, histologically malignant, recurrent cutaneous eruption characterised by an infiltration of large atypical cells surrounded by inflammatory cells. The atypical cells resemble reed-sternberg cells of hodgkin's disease or the malignant cells of cutaneous T-cell lymphoma. In some cases, lymphomatoid papulosis progresses to lymphomatous conditions including mycosis fungoides, hodgkin's disease, cutaneous T-cell lymphoma, or ki-1 lymphoma. (12 Dec 1998) |
| lymphomatosis | Any condition characterised by the occurrence of multiple, widely distributed sites of involvement with lymphoma. Avian lymphomatosis, a group of virus-induced transmissible diseases of chickens and some other birds in which there is lymphoid cell infiltration or formation of lymphomatous tumours in various tissues and organs; the two principal diseases are: 1) the avian leukosis-sarcoma complex-induced lymphoid leukosis, involving the bursa fabricius and various visceral organs, that is associated with viruses of the family Retroviridae; 2) Marek's disease, caused by avian herpesvirus 2 and involving primarily the peripheral nerves and gonads and, to a lesser and more variable extent, other visceral organs, skin, muscle, and the eye. Variability of lesion site prompted other names for avian lymphomatosis, such as big liver disease, ocular lymphomatosis, visceral lymphomatosis neurolymphomatosis gallinarum, and fowl paralysis. Synonym: fowl lymphomatosis. (05 Mar 2000) |
| lymphomatous | Pertaining to or characterised by lymphoma. (05 Mar 2000) |
| lymphomyeloma | <tumour> A medullary neoplasm that consists of uninuclear, relatively small cells with morphologic features resembling those of lymphocytic forms. Origin: Lympho-+ G. Myelos, marrow, + -oma, tumour (05 Mar 2000) |
| lymphomyxoma | <tumour> A soft nonmalignant neoplasm that contains lymphoid tissue in a matrix of loose, areolar connective tissue. Origin: Lympho-+ G. Myxa, mucus, + -oma, tumour (05 Mar 2000) |
| lymphopathia | Any disease of the lymphatic vessels or lymph nodes. Synonym: lymphopathia. Origin: Lympho-+ G. Pathos, suffering (05 Mar 2000) |
| lymphopathia venereum | An obsolete term for lymphogranuloma venereum. (05 Mar 2000) |
| lymphopathy | Any disease of the lymphatic vessels or lymph nodes. Synonym: lymphopathia. Origin: Lympho-+ G. Pathos, suffering (05 Mar 2000) |
| lymphopenia | Reduction in the number of lymphocytes. (12 Dec 1998) |