Allen M. Chen
University of California, San Francisco
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Featured researches published by Allen M. Chen.
Cancer | 2007
Allen M. Chen; Thierry Jahan; David M. Jablons; Joaquin Garcia; David A. Larson
The incidence and pattern of brain metastases was analyzed among patients who achieved a pathological complete response (pCR) after neoadjuvant chemotherapy or chemoradiotherapy for locally advanced nonsmall‐cell lung cancer (NSCLC).
International Journal of Radiation Oncology Biology Physics | 2008
Allen M. Chen; Megan E. Daly; Ivan H. El-Sayed; Joaquin Garcia; Nancy Y. Lee; M. Kara Bucci; Michael Kaplan
PURPOSE To report the clinical outcome of patients treated with combined-modality approaches for sinonasal undifferentiated carcinoma (SNUC) of the head and neck. METHODS AND MATERIALS The records of 21 patients with SNUC treated with curative intent at the University of California, San Francisco between 1990 and 2004 were analyzed. Patient age ranged from 33 to 71 years (median, 47 years). Primary tumor sites included the nasal cavity (11 patients), maxillary sinus (5 patients), and ethmoid sinus (5 patients). All patients had T3 (4 patients) or T4 (17 patients) tumors. Local-regional treatment included surgery followed by postoperative radiotherapy (PORT) with or without adjuvant chemotherapy for 17 patients; neoadjuvant chemoradiotherapy followed by surgery for 2 patients; and definitive chemoradiotherapy for 2 patients. Median follow-up among surviving patients was 58 months (range, 12-70 months). RESULTS The 2- and 5-year estimates of local control were 60% and 56%, respectively. There was no difference in local control according to initial treatment approach, but among the 19 patients who underwent surgery the 5-year local control rate was 74% for those with gross tumor resection, compared with 24% for those with subtotal tumor resection (p = 0.001). The 5-year rates of overall and distant metastasis-free survival were 43% and 64%, respectively. Late complications included cataracts (2 patients), lacrimal stenosis (1 patient), and sino-cutaneous fistula (1 patient). CONCLUSION The suboptimal outcomes suggest a need for more effective therapies. Gross total resection should be the goal of all treatments whenever possible.
Head and Neck-journal for The Sciences and Specialties of The Head and Neck | 2008
Allen M. Chen; Joaquin Garcia; M. Kara Bucci; Albert Chan; Michael Kaplan; Mark I. Singer; Theodore L. Phillips
The optimal treatment for patients with locally recurrent carcinomas of the salivary glands is unclear.
International Journal of Radiation Oncology Biology Physics | 2006
Allen M. Chen; M. Kara Bucci; Vivian Weinberg; Joaquin Garcia; Jeanne M. Quivey; Naomi R. Schechter; Theodore L. Phillips; Karen K. Fu; David W. Eisele
International Journal of Radiation Oncology Biology Physics | 2007
Megan E. Daly; Allen M. Chen; M. Kara Bucci; Ivan H. El-Sayed; P. Xia; Michael Kaplan; David W. Eisele
International Journal of Radiation Oncology Biology Physics | 2007
Allen M. Chen; Megan E. Daly; M. Kara Bucci; P. Xia; Clayton Akazawa; Jeanne M. Quivey; Vivian Weinberg; Joaquin Garcia; Nancy Y. Lee; Michael Kaplan; Ivan H. El-Sayed; David W. Eisele; Karen K. Fu; Theodore L. Phillips
International Journal of Radiation Oncology Biology Physics | 2007
Allen M. Chen; Phillip J. Granchi; Joaquin Garcia; M. Kara Bucci; Karen K. Fu; David W. Eisele
International Journal of Radiation Oncology Biology Physics | 2006
Allen M. Chen; M. Kara Bucci; Jeanne M. Quivey; Joaquin Garcia; David W. Eisele; Karen K. Fu
International Journal of Radiation Oncology Biology Physics | 2007
Allen M. Chen; Joaquin Garcia; Nancy Y. Lee; M. Kara Bucci; David W. Eisele
International Journal of Radiation Oncology Biology Physics | 2007
Allen M. Chen; Joaquin Garcia; M. Kara Bucci; Jeanne M. Quivey; David W. Eisele