Can RT to non-bulky sites be omitted in an early stage (stage I or II) classical Hodgkin's lymphoma case with a CR by PET/CT?

Randomized studies have consistently demonstrated that combined modality therapy is superior to chemotherapy alone in regards to progression-free survival in early-stage Hodgkin lymphoma. The magnitude of the benefit varies across studies, but a relative risk reduction of ~50% can be expected which ...