Sezary disease, intrapelvic lymph nodes

This code represents Sezary disease, a rare and aggressive form of cutaneous T-cell lymphoma, specifically when it involves the lymph nodes located within the pelvis. Sezary disease is characterized by erythroderma, generalized lymphadenopathy, and the presence of malignant T-cells (Sezary cells) in the skin, blood, and lymph nodes.

Use this code when documentation explicitly states a diagnosis of Sezary disease with confirmed involvement of intrapelvic lymph nodes. This typically requires pathological confirmation from a biopsy of the affected lymph nodes or imaging studies demonstrating pelvic lymphadenopathy in a patient with a known Sezary disease diagnosis.

• Ensure documentation clearly specifies "intrapelvic" lymph node involvement, not just generalized lymphadenopathy.
• Do not confuse this with other types of cutaneous T-cell lymphoma or other lymphomas affecting pelvic lymph nodes.
• Sequence this code as a primary diagnosis when the intrapelvic lymph node involvement is the focus of the encounter, or as a secondary diagnosis when it's a significant co-morbidity.