- T cell deficiency [DOID:11200]
A primary immunodeficiency disease that is characterized by decreased numbers of circulating or functioning T cells.
- pericytoma with t(7;12) [DOID:0080896]
A perivascular tumor that is characterized by a perivascular pattern of spindle-to-ovoid cell proliferation and that has_material_basis_in t(7;12)(p22;q13) translocation with resultant ACTB-GLI1 fusion.
- T-cell prolymphocytic leukemia [DOID:0081042]
A prolymphocytic leukemia that is characterized by the proliferation of small to medium sized prolymphocytes with a mature T-cell phenotype, involving the blood, bone marrow, lymph nodes, liver, spleen, and skin.
- hepatosplenic T-cell lymphoma [DOID:0081049]
A mature T-cell and NK-cell lymphoma that is characterized by the presence of medium-size neoplastic lymphocytes infiltrating the hepatic sinusoids and that originates from cytotoxic T-cells, usually of gamma/delta T-cell type.
- adult T-cell leukemia/lymphoma [DOID:0050523]
A T-cell acute leukemia that results_in abnormal increase of lymphocytes, derives_from T-cells, has_material_basis_in Human T-lymphotropic virus 1 (HTLV-1), which is transmitted_by sexual contact, transmitted_by contaminated needles used by intravenous-drug users, and transmitted_by breast feeding. The infection results_in_formation_of skin lesions.