Small cell B-cell lymphoma, intra-abdominal lymph nodes

This code identifies a specific type of non-Hodgkin lymphoma characterized by small B-cells, located within the lymph nodes of the abdominal cavity. This malignancy originates from B-lymphocytes and is typically indolent, meaning it grows slowly. It is distinct from other B-cell lymphomas based on its cellular morphology and anatomical location.

Use this code when documentation confirms a diagnosis of small cell B-cell lymphoma affecting the intra-abdominal lymph nodes. This diagnosis is typically established through biopsy and histopathological examination of the affected lymph nodes. Supporting documentation should clearly specify both the histological subtype (small cell B-cell) and the anatomical site (intra-abdominal lymph nodes).

• Ensure the pathology report explicitly states "small cell B-cell lymphoma" and "intra-abdominal lymph nodes."
• Do not confuse this with other B-cell lymphoma subtypes or lymphomas affecting other anatomical sites.
• Code additional sites of involvement if documented, using appropriate secondary malignancy codes.