The outcome of 221 patients with bulky (≥10 cm) classic Hodgkin lymphoma (cHL) treated with doxorubicin, bleomycin, vinblastine, dacarbazine and consolidative radiotherapy (RT) only in those with a positive end-of-treatment (EOT) positron emission tomography (PET) scan was evaluated. With a median follow-up of 9.6 years, 5- and 10-year progression-free survival (PFS) in EOT PET-negative cases were 94.0% and 90.4%, respectively, and in PET-positive cases, 5/10-year PFS was 64.6% (p < 0.001), with 15% overall receiving RT. Five-year PFS for Deauville (D) score DX/D1-3 was 93.6%, compared with D4 66.7% (p < 0.001) and D5 33.3% (p < 0.001). Omission of RT in EOT PET-negative cases is associated with excellent long-term outcomes in bulky cHL.
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