Subdiaphragmatic Hodgkin's disease: laparotomy and treatment results in 49 patients.

The clinical records of 1,616 patients with previously untreated Hodgkin's disease were reviewed. Forty-nine of these patients (3%) presented with disease limited to sites below the diaphragm and underwent laparotomy as part of their staging evaluation. The clinical and histological characteristics of this group of patients with subdiaphragmatic Hodgkin's disease are compared with those who presented with supradiaphragmatic disease. Splenectomy in 47 patients revealed splenic involvement in 16 (39%), and bulky splenic involvement (more than five gross nodules) in ten (24%). The final pathological stage (PS) distribution was PS I = 8, PS II = 37, PS IV = 4. No clinical stage (CS) IA patients and only two of 20 patients with negative paraaortic nodes on lymphogram had splenic involvement in contrast to eight of nine CS IIB patients. Freedom from relapse and survival were similar to patients with equivalent stage supradiaphragmatic disease. Splenic involvement and bulky splenic involvement were associated with a significantly decreased survival. Twelve out of 44 PS IA to IIB patients relapsed. In eight of these 12 patients, relapse was limited to sites above the diaphragm and another two patients relapsed both above and below the diaphragm. Patients who received total lymphoid irradiation were less likely to relapse above the diaphragm than patients who received no supradiaphragmatic irradiation. We recommend that CS IA and IIA patients with subdiaphragmatic disease undergo staging laparotomy and receive supradiaphragmatic irradiation as part of their treatment. Laparotomy may not be necessary for CS IIB patients who are at high risk for splenic disease if chemotherapy is planned as part of their treatment program.