The clinical information was kindly provided by Drs Thomas E Carey and Carol R Bradford, and some information was previously presented in the literature. 'Primary sites' refers to the origin of the primary tumor. 'Specimen site' refers to origin of tissue used to establish cultures. 'Prior therapy' refers to therapy given before the specimen used for culture was obtained. 'Survival' represents time in months from diagnosis to last follow up. BOT, base of tongue; bx, biopsy; C, chemotherapy; DOD, died with disease; DWOD, died without disease; F, female; FOM, floor of mouth; LN, lymph nodes; LTF, lost to follow-up; M, male; met, metastasis; N, none; NED, no evidence of disease; Pri, primary tumor site; R, radiation; recur, recurrence; resect, surgical resection specimen; SCC, squamous cell carcinoma; S, surgery; TNM, tumor-node-metastasis (staging system); UM-SCC, University of Michigan series head and neck squamous cell carcinoma.