NK/T cell lymphoma NOS
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.
Aggressive nodal or extranodal mature peripheral) t-cell lymphomas that do not belong to the better defined entities of the remainder of mature t-cell lymphomas. This category includes the following variants: lymphoepithelioid cell variant lennert’s lymphoma), follicular variant, and t-zone variant.
One of a group of aggressive fast-growing) non-hodgkin lymphomas that begin in mature t lymphocytes t cells that have matured in the thymus gland and gone to other lymphatic sites in the body, including lymph nodes, bone marrow, and spleen.)
One of a group of aggressive fast-growing) non-hodgkin lymphomas that begins in mature t lymphocytes t cells that have matured in the thymus gland and goes to other lymphatic sites in the body, including lymph nodes, bone marrow, and spleen.)
This type of lymphoma is not frequently seen in the western hemisphere. Clinically, with the exception of anaplastic large cell lymphoma, mature t- and nk-cell lymphomas are among the most aggressive of all hematopoietic neoplasms. Representative disease entities include mycosis fungoides, angioimmunoblastic t-cell lymphoma, hepatosplenic t-cell lymphoma, and anaplastic large cell lymphoma.
C84.9 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
The 2023 edition of ICD-10-CM C84.9 became effective on October 1, 2022.
This is the American ICD-10-CM version of C84.9 – other international versions of ICD-10 C84.9 may differ.