Patients received 4 cycles of brentuximab vedotin & AVD chemotherapy. Brentuximab vedotin, 1.2 mg/kg, will be administered on days 1 and 15 of each 28 day cycle. Doxorubicin 25 mg/m2, Vinblastine 6 mg/m2, & Dacarbazine 375 mg/m2 will be administered on days 1 and 15 of each 28 day cycle. This may be followed by 30 Gy involved site radiotherapy. Involved site radiotherapy should be initiated from 12 days to 42 days after completion of chemotherapy. It is mandatory to administer prophylactic growth factor support starting with cycle 1. Choice of growth factor and dosing can be determined at the discretion of the treating physican.

Patients with early stage, unfavorable risk Hodgkin lymphoma. The definition of disease bulk, one of the unfavorable risk features, has been updated, and is defined as the presence of any lymph node mass with transverse maximal diameter > 7.0 cm OR coronal maximal diameter > 7.0 cm. Patients will receive 4 cycles of brentuximab vedotin & AVD chemotherapy. Brentuximab vedotin, 1.2 mg/kg, will be administered on days 1 and 15 of each 28 day cycle. Doxorubicin 25 mg/m2, Vinblastine 6 mg/m2, and Dacarbazine 375 mg/m2 will be administered on days 1 & 15 of each 28 day cycle. This may be followed by 20 Gy involved site radiotherapy.

Patients will have early stage, unfavorable risk classical Hodgkin lymphoma with disease bulk defined as the presence of any lymph node mass with transverse maximal diameter > 7.0 cm or coronal maximal diameter > 7.0 cm. Patients will receive 4 cycles of brentuximab vedotin and AVD chemotherapy. Brentuximab vedotin, 1.2 mg/kg, will be administered on days 1 and 15 of each 28 day cycle. Doxorubicin 25 mg/m2, Vinblastine 6 mg/m2, and Dacarbazine 375 mg/m2 will be administered on days 1 and 15 of each 28 day cycle. This may be followed by 30.6 Gy CVRT.

specifically non-infectious pneumonitis The definition of unacceptable pulmonary toxicity will be defined as the development of grade 2 or higher pneumonitis as defined by Common Terminology Criteria for Adverse Events (CTCAE version 4).

Evaluate the rate of PET-negative complete responses after completion of the treatment program (8 weeks (+/- 2 weeks) after completion of radiotherapy).

(i.e. correlation with progression free survival) of interim fluorodeoxyglucose-positron emission tomography (PET) in this patient population measured by visual analysis and semi-quantitative analysis.