Non-follic (diffuse) lymphoma, unsp, intrapelvic lymph nodes

This code signifies a malignant proliferation of lymphocytes that does not originate from follicular centers, affecting the lymph nodes located within the pelvic cavity. The specific histological subtype of non-follicular lymphoma is not identified. This diagnosis indicates a primary or metastatic involvement of the intrapelvic lymphatic system by an unspecified diffuse lymphoma.

This code is appropriate when documentation confirms a diagnosis of diffuse lymphoma, but the specific subtype (e.g., diffuse large B-cell lymphoma, peripheral T-cell lymphoma) is not yet determined or specified. It should be used when the disease is localized to or primarily involves the lymph nodes within the pelvis, as evidenced by imaging, biopsy, or surgical findings.

• Ensure documentation explicitly states "diffuse" or "non-follicular" and specifies involvement of "intrapelvic lymph nodes."
• Avoid using this code if a more specific histological subtype of non-follicular lymphoma is identified; instead, code to the specific subtype.
• Sequence this code as the primary diagnosis when the lymphoma is the reason for the encounter, followed by any associated symptoms or complications.