Foliclar lymphoma grade IIIa, nodes of axilla and upper limb

This code signifies a specific type of non-Hodgkin lymphoma, follicular lymphoma, which has reached grade IIIa, indicating a more aggressive cellular morphology. The primary site of involvement for this diagnosis is the lymph nodes located in the axilla and upper limb.

This code is appropriate when documentation confirms a diagnosis of follicular lymphoma, specifically graded as IIIa, and the affected lymph nodes are explicitly identified as being in the axillary or upper limb regions. Pathological reports confirming the grade and imaging or physical exam findings localizing the disease to these lymph nodes are essential for its use.

• Ensure the pathology report explicitly states "follicular lymphoma grade IIIa" to support this specific grade.
• Verify that the documentation clearly specifies involvement of lymph nodes in the axilla or upper limb, not other sites.
• Do not use this code if the grade is unspecified or if the primary site is documented as generalized or involving other lymph node regions.