Cervical lymph node hyperplasia on [(18)F]-fluorodeoxyglucose positron emission tomography/computed tomography scan after treatment of children and adolescents with malignant lymphoma.

•Cervical lymph node hyperplasia is a benign processes.•Lymph node hyperplasia found in treated children and adolescents with lymphoma.•We define imaging manifestations of cervical lymph node hyperplasia in PET/CT.•Awareness of lymph node hyperplasia avoid invasive procedures and over-treatment.