Mark Lane Welton

Colorectal surgeon, Surgical oncologist, Colon and rectal surgeon

Harry A. Oberhelman, Jr. Professor

Gastrointestinal (GI) Cancer Program

  • 875 Blake Wilbur Drive
  • Palo Alto, CA 94304
  • Phone: 650-498-6000
Learn More About the Clinic Getting Here Make An Appointment

Professional Education

Board Certification: General Surgery, American Board of Surgery (1992)

Residency: UCLA Medical Center (1992) CA

Board Certification: Colon and Rectal Surgery, American Board of Colon and Rectal Surgery (1994)

Fellowship: Barnes - Jewish Hospital (1993) MO

Internship: UCLA Medical Center (1985) CA

Medical Education: UCLA School of Medicine (1984) CA

B.S. (Honors), UC Davis, Human Development (1979)

M.D., UCLA, Medicine (1984)

Honors & Awards

Phi Kappa Phi, UC Davis (1979)

Alpha Omega Alpha, UCLA School of Medicine (1984)

Young Researcher Award, Research Foundation of the American Society of Colon & Rectal Surgeons (1998)

Distinguished Physician Award, Crohn's and Colitis Foundation of America (1998)

Best Basic Science Paper, National Meeting of American Society of Colon & Rectal Surgeons (1999)

Mechanical Bowel Preparation in Intestinal Surgery: A Meta-Analysis and Review of the Literature
Pineda, C. E., Shelton, A. A., Hernandez-Boussard, T., Morton, J. M., & Welton, M. L. (2008). Mechanical Bowel Preparation in Intestinal Surgery: A Meta-Analysis and Review of the Literature. JOURNAL OF GASTROINTESTINAL SURGERY, 12(11), 2037-2044.

Controversies in the management of anal high-grade squamous intraepithelial lesions.
Pineda, C. E., & Welton, M. L. (2008). Controversies in the management of anal high-grade squamous intraepithelial lesions. Minerva chirurgica, 63(5), 389-399.

Diagnostic problems in anal pathology
Longacre, T. A., Kong, C. S., & Welton, M. L. (2008). Diagnostic problems in anal pathology. ADVANCES IN ANATOMIC PATHOLOGY, 15(5), 263-278.

High-resolution anoscopy targeted surgical destruction of anal high-grade squamous intraepithelial lesions: A ten-year experience
Pineda, C. E., Berry, J. M., Jay, N., Palefsky, J. M., & Welton, M. L. (2008). High-resolution anoscopy targeted surgical destruction of anal high-grade squamous intraepithelial lesions: A ten-year experience. DISEASES OF THE COLON & RECTUM, 51(6), 829-835.

High resolution anoscopy in the planned staged treatment of anal squamous intraepithelial lesions in HIV-negative patients
Pineda, C. E., Berry, J. M., Jay, N., Palefsky, J. M., & Welton, M. L. (2007). High resolution anoscopy in the planned staged treatment of anal squamous intraepithelial lesions in HIV-negative patients. JOURNAL OF GASTROINTESTINAL SURGERY, 11(11), 1410-1415.

Role of human papillomavirus in squamous cell metaplasia-dysplasia-carcinoma of the rectum
Kong, C. S., Welton, M. L., & Longacre, T. A. (2007). Role of human papillomavirus in squamous cell metaplasia-dysplasia-carcinoma of the rectum. AMERICAN JOURNAL OF SURGICAL PATHOLOGY, 31(6), 919-925.

Transperineal repair of persistent rectovaginal fistulas using an acellular cadaveric dermal graft (AlloDerm (R))
Shelton, A. A., & Welton, M. L. (2006). Transperineal repair of persistent rectovaginal fistulas using an acellular cadaveric dermal graft (AlloDerm (R)). DISEASES OF THE COLON & RECTUM, 49(9), 1454-1457.

The etiology and epidemiology of anal cancer.
Welton, M. L., Sharkey, F. E., & Kahlenberg, M. S. (2004). The etiology and epidemiology of anal cancer. Surgical oncology clinics of North America, 13(2), 263-275.

Expression and endocytosis of VEGF and its receptors in human colonic vascular endothelial cells
Wang, D. F., Lehman, R. E., Donner, D. B., Matli, M. R., Warren, R. S., & Welton, M. L. (2002). Expression and endocytosis of VEGF and its receptors in human colonic vascular endothelial cells. AMERICAN JOURNAL OF PHYSIOLOGY-GASTROINTESTINAL AND LIVER PHYSIOLOGY, 282(6), G1088-G1096.

Surgical treatment of high-grade anal squamous intraepithelial lesions - A prospective study
Chang, G. J., Berry, J. M., Jay, N., Palefsky, J. M., & Welton, M. L. (2002). Surgical treatment of high-grade anal squamous intraepithelial lesions - A prospective study. DISEASES OF THE COLON & RECTUM, 45(4), 453-458.

Anal Bowen?s Disease and High Grade Squamous Intraepithelial Lesions are Histologically and Immunohistochemically Indistinguishable
Welton ML, merhauser A, Litle VL, Leavenworth J, Darraugh T, & Palefsky JM. (2002). Anal Bowen?s Disease and High Grade Squamous Intraepithelial Lesions are Histologically and Immunohistochemically Indistinguishable. Submitted Dis Colon Rectum.

Anal Cartography in the Treatment of Anal Bowen?s Disease and High-Grade Squamous Intraepithelial Lesions
Welton ML. (2002). Anal Cartography in the Treatment of Anal Bowen?s Disease and High-Grade Squamous Intraepithelial Lesions. Submitted Dis Colon Rectum.

Clinicopathologic and molecular features of sporadic early-onset colorectal adenocarcinoma: an adenocarcinoma with frequent signet ring cell differentiation, rectal and sigmoid involvement, and adverse morphologic features
Chang, D. T., Pai, R. K., Rybicki, L. A., DiMaio, M. A., Limaye, M., & Pai, R. K. (2012). Clinicopathologic and molecular features of sporadic early-onset colorectal adenocarcinoma: an adenocarcinoma with frequent signet ring cell differentiation, rectal and sigmoid involvement, and adverse morphologic features. MODERN PATHOLOGY, 25(8), 1128-1139.

Orthovoltage Intraoperative Radiotherapy for Locally Advanced and Recurrent Colorectal Cancer
Daly, M. E., Kapp, D. S., Maxim, P. G., Welton, M. L., Tran, P. T., & Chang, D. T. (2012). Orthovoltage Intraoperative Radiotherapy for Locally Advanced and Recurrent Colorectal Cancer. DISEASES OF THE COLON & RECTUM, 55(6), 695-702.

Intensity-Modulated Radiation Therapy Versus Conventional Radiation Therapy for Squamous Cell Carcinoma of the Anal Canal
Bazan, J. G., Hara, W., Hsu, A., Kunz, P. A., Ford, J., & Chang, D. T. (2011). Intensity-Modulated Radiation Therapy Versus Conventional Radiation Therapy for Squamous Cell Carcinoma of the Anal Canal. CANCER, 117(15), 3342-3351.

Pathological response after chemoradiation for T3 rectal cancer.
Chennupati, S. K., Kamaya, A., Fisher, G. A., Ford, J. M., Kunz, P., & Chang, D. T. (2010). Pathological response after chemoradiation for T3 rectal cancer. Colorectal disease , 12(7 Online), e24-30.

Management of anal squamous intraepithelial lesions.
Pineda, C. E., & Welton, M. L. (2009). Management of anal squamous intraepithelial lesions. Clinics in colon and rectal surgery, 22(2), 94-101.