Mantle cell lymphoma, intra-abdominal lymph nodes

This code signifies a specific type of non-Hodgkin lymphoma, mantle cell lymphoma, when it is located within the lymph nodes of the abdominal cavity. This aggressive B-cell lymphoma is characterized by its distinct cellular morphology and immunophenotype.

Apply this code when documentation explicitly states a diagnosis of mantle cell lymphoma affecting intra-abdominal lymph nodes. This diagnosis is typically confirmed through biopsy and histopathological examination, often guided by imaging studies such as CT or PET scans.

• Ensure the documentation clearly specifies "mantle cell lymphoma" and its "intra-abdominal" location.
• Do not confuse with other types of non-Hodgkin lymphoma or lymphomas affecting extra-abdominal sites.
• Code additional sites of involvement with appropriate secondary malignancy codes if documented.