Follicular lymphoma grade III, unsp, intrathorac lymph nodes

This code signifies a high-grade follicular lymphoma, a type of non-Hodgkin lymphoma, specifically located within the intrathoracic lymph nodes. It indicates a more aggressive form of follicular lymphoma, characterized by a higher proliferation rate of malignant B-cells. The "unspecified" aspect means the specific subtype of grade III follicular lymphoma is not documented.

Use this code when documentation clearly states a diagnosis of follicular lymphoma, grade III, affecting lymph nodes within the chest cavity. This diagnosis is typically confirmed through biopsy and histopathological examination, with the grade assigned based on the number of centroblasts per high-power field.

• Ensure documentation specifies "grade III" and "intrathoracic lymph nodes" to accurately assign this code.
• Do not use this code if the specific subtype of grade III follicular lymphoma (e.g., diffuse large B-cell lymphoma component) is documented; a more specific code would be appropriate.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter, unless another condition is clearly the principal diagnosis.