Prph T-cell lymphoma, NEC, nodes of axilla and upper limb

This code signifies a diagnosis of peripheral T-cell lymphoma (PTCL) that does not fit into other specific PTCL categories, with primary involvement or metastasis specifically identified in the lymph nodes of the axilla and/or upper limb. PTCLs are a diverse group of aggressive non-Hodgkin lymphomas originating from mature T-cells.

Apply this code when documentation clearly states a diagnosis of "peripheral T-cell lymphoma, not otherwise specified" or "PTCL, NOS," and explicitly identifies involvement of lymph nodes in the axilla, arm, or hand. This code is appropriate when the specific subtype of PTCL is not further defined or when the morphology does not align with other specific PTCL codes.

• Ensure the documentation specifies "peripheral T-cell lymphoma" and not another type of lymphoma.
• Verify that the affected anatomical site is explicitly stated as axillary or upper limb lymph nodes.
• Do not use this code if a more specific subtype of peripheral T-cell lymphoma (e.g., anaplastic large cell lymphoma) is documented.