Table I. Patient, tumor and treatment characteristics of the 21 patients with LN oligo-recurrence.
IMRT: Intensity-modulated radiation therapy; SCC: squamous cell carcinoma; CCRT: concurrent chemoradiotherapy; LN: lymph node; GTV: gross tumor volume; RT: radiotherapy. *Ten patients received systemic therapy during the period, considered to affect the therapeutic effect of IMRT; six received chemotherapy and four received hormone therapy.