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Siegrid Yu, M.D.

Dermatologic surgeon

Dr. Siegrid Yu is a dermatologic surgeon at the UCSF Dermatologic Surgery and Laser Center. She specializes in Mohs micrographic surgery and surgical reconstruction for skin cancer. Her expertise also includes laser surgery; rejuvenation of aging skin including Botox, soft tissue fillers, and leg vein treatment; and cosmetic treatment of Asian skin. She is board certified by the American Board of Dermatology and the American Board of Internal Medicine.

She received a medical degree at the University of Washington and completed an internship and residency in internal medicine at Stanford University Medical Center, where she served as chief resident of internal medicine. She completed a dermatology residency at UCSF where she was chief resident, and a Mohs surgery and procedural dermatology fellowship at UCSF. Yu's research focuses on Merkel cell carcinoma, skin cancer in immunosuppressed patients and other skin cancer. Her research awards include the Dermatology Foundation Clinical Career Development in Dermatologic Surgery. She is a member of the American Society of Dermatologic Surgery (ASDS) and received an ASDS Cutting Edge Research Grant. She also is a member of the American Academy of Dermatology, American College of Mohs Surgery and American Medical Association. She is an associate professor of clinical dermatology and director of the Procedural Dermatology Fellowship.


Dermatologic Surgery and Laser Center
1701 Divisadero St.
San Francisco, CA 94115
Phone: (415) 353–7878
Fax: (415) 353–7838

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

Melanoma Center
1600 Divisadero St., Third Floor
San Francisco, CA 94115
Phone: (415) 353-9900
Fax: (415) 885-3802

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

Conditions & Treatments

More about Siegrid Yu

Additional Languages



University of Washington 1998


Stanford University Medical Center, Internal Medicine 2002
UCSF Medical Center, Dermatology 2005


UCSF Medical Center, Mohs micrographic surgery and procedural dermatology 2006

Selected Research and Publications

  1. Berliner JG, Aldabagh B, Mully T, Yu SS, Schwartz BS, Berger TG. Non-tuberculous mycobacterial infections following cosmetic laser procedures: a case report and review of the literature. J Drugs Dermatol. 2015 Jan 1; 14(1):80-3.
  2. Arron ST, Canavan T, Yu SS. Organ transplant recipients with Merkel cell carcinoma have reduced progression-free, overall, and disease-specific survival independent of stage at presentation. J Am Acad Dermatol. 2014 Oct; 71(4):684-90.
  3. Aldabagh B, Joo J, Yu SS. Merkel cell carcinoma: current status of targeted and future potential for immunotherapies. Semin Cutan Med Surg. 2014 Jun; 33(2):76-82.
  4. Sanchez Rodriguez R, Pauli ML, Neuhaus IM, Yu SS, Arron ST, Harris HW, Yang SH, Anthony BA, Sverdrup FM, Krow-Lucal E, MacKenzie TC, Johnson DS, Meyer EH, Löhr A, Hsu A, Koo J, Liao W, Gupta R, Debbaneh MG, Butler D, Huynh M, Levin EC, Leon A, Hoffman WY, McGrath MH, Alvarado MD, Ludwig CH, Truong HA, Maurano MM, Gratz IK, Abbas AK, Rosenblum MD. Memory regulatory T cells reside in human skin. J Clin Invest. 2014 Mar 3; 124(3):1027-36.
  5. Iyer JG, Storer BE, Paulson KG, Lemos B, Phillips JL, Bichakjian CK, Zeitouni N, Gershenwald JE, Sondak V, Otley CC, Yu SS, Johnson TM, Liegeois NJ, Byrd D, Sober A, Nghiem P. Relationships among primary tumor size, number of involved nodes, and survival for 8044 cases of Merkel cell carcinoma. J Am Acad Dermatol. 2014 Apr; 70(4):637-43.
  6. Ibrahim SF, Ahronowitz I, McCalmont TH, Hernandez Pampaloni M, Ryan JL, Yu SS. 18F-fluorodeoxyglucose positron emission tomography-computed tomography imaging in the management of Merkel cell carcinoma: a single-institution retrospective study. Dermatol Surg. 2013 Sep; 39(9):1323-33.
  7. Ahronowitz I, Nghiem P, Yu S. Importance of genetic studies in patients with multiple merkel cell carcinomas. Acta Derm Venereol. 2012 Nov; 92(6):633; author reply p.634.
  8. Gill JF, Yu SS, Neuhaus IM. Tobacco smoking and dermatologic surgery. J Am Acad Dermatol. 2013 Jan; 68(1):167-72.
  9. Han SY, North JP, Canavan T, Kim N, Yu SS. Merkel cell carcinoma. Hematol Oncol Clin North Am. 2012 Dec; 26(6):1351-74.
  10. Hall BJ, Pincus LB, Yu SS, Oh DH, Wilson AR, McCalmont TH. Immunohistochemical prognostication of Merkel cell carcinoma: p63 expression but not polyomavirus status correlates with outcome. J Cutan Pathol. 2012 Oct; 39(10):911-7.
  11. Neuhaus IM, Yu SS. Second-intention healing of nasal alar defects. Dermatol Surg. 2012 Apr; 38(4):697-702.
  12. Ahronowitz IZ, Daud AI, Leong SP, Shue EH, Bastian BC, McCalmont TH, Yu SS. An isolated Merkel cell carcinoma metastasis at a distant cutaneous site presenting as a second 'primary' tumor. J Cutan Pathol. 2011 Oct; 38(10):801-7.
  13. Durinck S, Ho C, Wang NJ, Liao W, Jakkula LR, Collisson EA, Pons J, Chan SW, Lam ET, Chu C, Park K, Hong SW, Hur JS, Huh N, Neuhaus IM, Yu SS, Grekin RC, Mauro TM, Cleaver JE, Kwok PY, LeBoit PE, Getz G, Cibulskis K, Aster JC, Huang H, Purdom E, Li J, Bolund L, Arron ST, Gray JW, Spellman PT, Cho RJ. Temporal dissection of tumorigenesis in primary cancers. Cancer Discov. 2011 Jul; 1(2):137-43.
  14. Farasat S, Yu SS, Neel VA, Nehal KS, Lardaro T, Mihm MC, Byrd DR, Balch CM, Califano JA, Chuang AY, Sharfman WH, Shah JP, Nghiem P, Otley CC, Tufaro AP, Johnson TM, Sober AJ, Liégeois NJ. A new American Joint Committee on Cancer staging system for cutaneous squamous cell carcinoma: creation and rationale for inclusion of tumor (T) characteristics. J Am Acad Dermatol. 2011 Jun; 64(6):1051-9.
  15. Lemos BD, Storer BE, Iyer JG, Phillips JL, Bichakjian CK, Fang LC, Johnson TM, Liegeois-Kwon NJ, Otley CC, Paulson KG, Ross MI, Yu SS, Zeitouni NC, Byrd DR, Sondak VK, Gershenwald JE, Sober AJ, Nghiem P. Pathologic nodal evaluation improves prognostic accuracy in Merkel cell carcinoma: analysis of 5823 cases as the basis of the first consensus staging system. J Am Acad Dermatol. 2010 Nov; 63(5):751-61.
  16. Fu JM, McCalmont T, Yu SS. Adenosquamous carcinoma of the skin: a case series. Arch Dermatol. 2009 Oct; 145(10):1152-8.
  17. Lemos BD, Yu SS, Nghiem P. Case 19-2008: Merkel-cell carcinoma. N Engl J Med. 2008 Oct 9; 359(15):1629-30; author reply 1630-1.
  18. Ridd K, Yu S, Bastian BC. The presence of polyomavirus in non-melanoma skin cancer in organ transplant recipients is rare. J Invest Dermatol. 2009 Jan; 129(1):250-2.
  19. Wesley NO, Yu SS, Grekin RC, Neuhaus IM. Primary linear closure for large defects of the nasal supratip. Dermatol Surg. 2008 Mar; 34(3):380-4; discussion 384-5.
  20. Hurst EA, Yu SS, Grekin RC, Neuhaus IM. Bleeding complications in dermatologic surgery. Semin Cutan Med Surg. 2007 Dec; 26(4):189-95.

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.