William Ryan, MD


Dr. William R. Ryan is a head and neck surgeon at the UCSF Helen Diller Family Comprehensive Cancer Center. He is skilled in caring for patients with benign and malignant tumors with the appropriate application of endoscopic, minimally invasive and traditional surgical techniques. He regularly performs ultrasonography in clinic and in the operating room for his patients. He also has experience with sentinel lymph node biopsy and regional facial reconstruction. Ryan helps direct the Robotic Head and Neck Surgery program along with Dr. Steven J. Wang.

Ryan is committed to providing adequate information and being as accessible as possible to his patients.

Ryan is actively involved in teaching in the UCSF residency training program and School of Medicine. He is an assistant professor in the division of Head and Neck Oncologic and Endocrine Surgery in the department of Otolaryngology-Head and Neck Surgery. He also conducts clinical research on the outcomes of head and neck surgery and radiology.

Ryan earned his medical degree from Stanford University School of Medicine, where he also completed his residency in otolaryngology-head and neck surgery. Following his residency, he completed a fellowship in head and neck oncologic/endocrine/skull base surgery at UCSF. He is an associate professor of otolaryngology at UCSF.


Head and Neck Surgery Cancer Clinic
1825 Fourth St., Fourth Floor
San Francisco, CA 94158
Phone: (415) 885–7528
Fax: (415) 885–7711

Hours: Monday to Friday
8 a.m. – 5 p.m.

Salivary Gland Surgery Center at Mission Bay
1825 Fourth St., Fourth Floor
San Francisco, CA 94158
Phone: (415) 885-7528
Fax: (415) 885-7711

Hours: Monday to Friday,
8 a.m. – 5 p.m.

Thyroid and Parathyroid Surgery
1825 Fourth St., Fourth Floor
San Francisco, CA 94158
Phone: (415) 885-7528
Fax: (415) 885-7711

Hours: Monday to Friday, 8 a.m. – 5 p.m.

Conditions & Treatments

Board Certification


More about William Ryan


Stanford University School of Medicine 2005


Stanford University Medical Center 2010


UCSF, Advanced Head and Neck Oncologic Surgery 2011

Selected Research and Publications

  1. Strohl MP, Dewyer NA, Sckolnick J, Ryan WR. A Novel Approach to Oropharyngeal Foreign Body Removal. Otolaryngol Head Neck Surg. 2018 Jan; 158(1):194-196.
  2. Tamplen ML, Tamplen J, Shuman E, Heaton CM, George JR, Wang SJ, Ryan WR. Comparison of Output Volume Thresholds for Drain Removal After Selective Lateral Neck Dissection: A Randomized Clinical Trial. JAMA Otolaryngol Head Neck Surg. 2017 Aug 24.
  3. Larson AR, Aubin-Pouliot A, Delagnes E, Zheng M, Chang JL, Ryan WR. Surgeon-Performed Ultrasound for Chronic Obstructive Sialadenitis Helps Predict Sialendoscopic Findings and Outcomes. Otolaryngol Head Neck Surg. 2017 Aug 01; 194599817728867.
  4. Delagnes EA, Zheng M, Aubin-Pouliot A, Chang JL, Ryan WR. Salivary duct stenosis: Short-term symptom outcomes after sialendoscopy-assisted salivary duct surgery. Laryngoscope. 2017 Jul 17.
  5. Naunheim M, Wu X, Ryan WR, Wang SJ, Heaton CM. Volumetric Growth Rate of Recurrent Pleomorphic Adenoma. Ann Otol Rhinol Laryngol. 2017 Jul; 126(7):544-547.
  6. Togarrati PP, Sasaki RT, Abdel-Mohsen M, Dinglasan N, Deng X, Desai S, Emmerson E, Yee E, Ryan WR, da Silva MCP, Knox SM, Pillai SK, Muench MO. Identification and characterization of a rich population of CD34+ mesenchymal stem/stromal cells in human parotid, sublingual and submandibular glands. Sci Rep. 2017 Jun 14; 7(1):3484.
  7. Ghosh P, Lazar AA, Ryan WR, Yom SS. A feasibility and efficacy trial of a hand-held humidification device in patients undergoing radiotherapy for head and neck cancer. Support Care Cancer. 2017 Aug; 25(8):2611-2618.
  8. Fakhry C, Westra WH, Wang SJ, van Zante A, Zhang Y, Rettig E, Yin LX, Ryan WR, Ha PK, Wentz A, Koch W, Richmon JD, Eisele DW, D'Souza G. The prognostic role of sex, race, and human papillomavirus in oropharyngeal and nonoropharyngeal head and neck squamous cell cancer. Cancer. 2017 May 01; 123(9):1566-1575.
  9. Tamplen ML, Tamplen J, Torrecillas V, Seth R, Ricceri S, Hemmat S, Heaton C, Ryan WR, Knott PD. Does a Standalone Cancer Center Improve Head and Neck Microsurgical Outcomes? J Reconstr Microsurg. 2017 May; 33(4):252-256.
  10. Heaton CM, Ahmed SR, Ryan WR. Transoral robotic surgery (TORS) for excision of a retropharyngeal intramuscular lipoma. Auris Nasus Larynx. 2017 Dec; 44(6):742-744.
  11. D'Souza G, Westra WH, Wang SJ, van Zante A, Wentz A, Kluz N, Rettig E, Ryan WR, Ha PK, Kang H, Bishop J, Quon H, Kiess AP, Richmon JD, Eisele DW, Fakhry C. Differences in the Prevalence of Human Papillomavirus (HPV) in Head and Neck Squamous Cell Cancers by Sex, Race, Anatomic Tumor Site, and HPV Detection Method. JAMA Oncol. 2016 Dec 08.
  12. JŠuregui E, Kiringoda R, Ryan WR, Eisele DW, Chang JL. Chronic parotitis with multiple calcifications: Clinical and sialendoscopic findings. Laryngoscope. 2017 Jul; 127(7):1565-1570.
  13. Yu Y, Mabray M, Silveira W, Shen PY, Ryan WR, Uzelac A, Yom SS. Earlier and more specific detection of persistent neck disease with diffusion-weighted MRI versus subsequent PET/CT after definitive chemoradiation for oropharyngeal squamous cell carcinoma. Head Neck. 2017 Mar; 39(3):432-438.
  14. Delagnes EA, Aubin-Pouliot A, Zheng M, Chang JL, Ryan WR. Sialadenitis without sialolithiasis: Prospective outcomes after sialendoscopy-assisted salivary duct surgery. Laryngoscope. 2017 May; 127(5):1073-1079.
  15. Alemi AS, Heaton CM, Ryan WR, El-Sayed I, Wang SJ. Volumetric Growth of Cervical Schwannoma as a Predictor of Surgical Intervention. Otolaryngol Head Neck Surg. 2017 Jan; 156(1):152-155.
  16. Hemmat SM, Wang SJ, Ryan WR. Neck Dissection Technique Commonality and Variance: A Survey on Neck Dissection Technique Preferences among Head and Neck Oncologic Surgeons in the American Head and Neck Society. Int Arch Otorhinolaryngol. 2017 Jan; 21(1):8-16.
  17. Heaton CM, Yu K, Calkins S, George JR, Ryan WR, Wang SJ. Clinicopathologic characteristics and outcomes of recurrent oropharyngeal squamous cell carcinoma. Am J Otolaryngol. 2016 Nov - Dec; 37(6):513-516.
  18. Hemmat S, Wang SJ, Ryan WR. How, when, and from whom neck dissection operative technique is learned: An international survey on neck dissection education among head and neck oncologic surgeons. Am J Otolaryngol. 2016 Sep-Oct; 37(5):431-5.
  19. Tamplen ML, Ricceri S, Hemmat S, Seth R, Ryan WR, Knott PD. Benefits of Immediate Extubation Following Free Tissue Transfer for Head and Neck Reconstruction. J Reconstr Microsurg. 2016 Sep; 32(7):533-9.
  20. Singer L, Calkins SM, Horvai AE, Ryan WR, Yom SS. Xanthogranuloma in the heavily irradiated low neck in a patient with head and neck cancer. J Otolaryngol Head Neck Surg. 2016 Mar 24; 45:20.

Publications are derived from MEDLINE/PubMed and provided by UCSF Profiles, a service of the Clinical & Translational Science Institute (CTSI) at UCSF. Researchers can make corrections and additions to their publications by logging on to UCSF Profiles.