Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Allen M. Chen is active.

Publication


Featured researches published by Allen M. Chen.


Cancer | 2007

Risk of cerebral metastases and neurological death after pathological complete response to neoadjuvant therapy for locally advanced nonsmall-cell lung cancer: Clinical implications for the subsequent management of the brain

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

PATTERNS OF FAILURE AFTER COMBINED-MODALITY APPROACHES INCORPORATING RADIOTHERAPY FOR SINONASAL UNDIFFERENTIATED CARCINOMA OF THE HEAD AND NECK

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

Recurrent salivary gland carcinomas treated by surgery with or without intraoperative radiation therapy

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

Adenoid cystic carcinoma of the head and neck treated by surgery with or without postoperative radiation therapy: Prognostic features of recurrence

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

Intensity-modulated radiation therapy for malignancies of the nasal cavity and paranasal sinuses

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

Carcinomas of the Paranasal Sinuses and Nasal Cavity Treated With Radiotherapy at a Single Institution Over Five Decades: Are We Making Improvement?

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

Local-regional recurrence after surgery without postoperative irradiation for carcinomas of the major salivary glands: Implications for adjuvant therapy

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

LONG-TERM OUTCOME OF PATIENTS TREATED BY RADIATION THERAPY ALONE FOR SALIVARY GLAND CARCINOMAS

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

Patterns of nodal relapse after surgery and postoperative radiation therapy for carcinomas of the major and minor salivary glands : What is the role of elective neck irradiation?

Allen M. Chen; Joaquin Garcia; Nancy Y. Lee; M. Kara Bucci; David W. Eisele


International Journal of Radiation Oncology Biology Physics | 2007

The role of postoperative radiation therapy in carcinoma ex pleomorphic adenoma of the parotid gland

Allen M. Chen; Joaquin Garcia; M. Kara Bucci; Jeanne M. Quivey; David W. Eisele

Collaboration


Dive into the Allen M. Chen's collaboration.

Top Co-Authors

Avatar

Joaquin Garcia

University of California

View shared research outputs
Top Co-Authors

Avatar

M. Kara Bucci

University of Texas MD Anderson Cancer Center

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Karen K. Fu

University of California

View shared research outputs
Top Co-Authors

Avatar

Megan E. Daly

University of California

View shared research outputs
Top Co-Authors

Avatar

Nancy Y. Lee

Memorial Sloan Kettering Cancer Center

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Researchain Logo
Decentralizing Knowledge