Other mature T/NK-cell lymphomas, intrapelvic lymph nodes

This code signifies a diagnosis of a mature T-cell or NK-cell lymphoma that does not fit into more specific categories, and is specifically located within the intrapelvic lymph nodes. These are aggressive non-Hodgkin lymphomas originating from mature T-lymphocytes or natural killer cells. The "other" designation indicates that the specific subtype of mature T/NK-cell lymphoma is not further specified or is a rare variant.

Use this code when documentation confirms a diagnosis of a mature T-cell or NK-cell lymphoma affecting lymph nodes within the pelvis, and the specific subtype is not otherwise classified. This applies when pathology reports identify the lymphoma as a mature T/NK-cell type but do not provide a more precise diagnosis such as anaplastic large cell lymphoma or peripheral T-cell lymphoma, NOS, and imaging or surgical findings confirm intrapelvic lymph node involvement.

• Ensure the pathology report explicitly states "mature T/NK-cell lymphoma" and the location as "intrapelvic lymph nodes."
• Do not use this code if a more specific subtype of mature T/NK-cell lymphoma (e.g., anaplastic large cell lymphoma, angioimmunoblastic T-cell lymphoma) is documented.
• Verify that the documentation clearly distinguishes intrapelvic lymph nodes from other abdominal or inguinal lymph node involvement.