Martin R. Weiser, MD

Vice Chair for Education and Faculty Development, Department of Surgery; Stuart H.Q. Quan Chair in Colorectal Surgery
Martin R. Weiser, MD

I am a surgical oncologist who specializes in colorectal surgery in patients with primary, metastatic, or recurrent cancers of the colon, rectum, anus, or appendix. My expertise in minimally invasive (laparoscopic and robotic) surgery enables me to remove these tumors while minimizing trauma to the patient. Whenever possible I use nerve-sparing surgical techniques that preserve sphincter, bladder, and sexual function.

My clinical research focuses on improving the staging of tumors and methods to predict patients’ outcomes following cancer surgery. I monitor and update Memorial Sloan Kettering’s colorectal cancer database, which tracks these outcomes to ensure that we are providing the highest quality of care. My laboratory research focuses on understanding and targeting the mechanisms underlying tumor spread and metastasis.

Appointments for New Patients
Clinical Expertise

Colon and Rectal Cancer Surgery; Minimally Invasive Surgery

Languages Spoken

MD, University of Chicago Pritzker School of Medicine


Brigham and Women’s Hospital; Harvard Medical School


Harvard Medical School; Memorial Sloan Kettering Cancer Center; Mount Sinai Medical Center (New York)

Board Certifications

Surgery; Colon and Rectal Surgery

Publications by Martin R. Weiser


Selected Book Chapters
“Adenocarcinoma of the colon and rectum.” Weiser MR, Saltz LB, Posner MC. In: Shackelford’s Surgery of the Alimentary Tract. 7th ed. Yeo CJ, ed. Philadelphia: WB Saunders; 2012.

“Left hemicolectomy for cancer.” Weiser MR. In: Mastery of Surgery. 6th ed. Fischer JE, ed. Chicago: Lippincott Williams & Wilkins; 2012.

“Endorectal ultrasound for preoperative staging.” Loh B, Weiser MR, Wong WD. In: Intersphincteric Resection of Low Rectal Tumors. Schiessel R, Metzger P, eds. New York: Springer; 2012.

“Rectal cancer.” Kim H, Weiser MR. In: Clinical Scenarios in Surgery: Decision Making and Operative Techniques. Dimick JB, Upchurch GR Jr, Sonnenday CJ. Philadelphia: Lippincott Williams & Wilkins; 2013. 

Visit PubMed for full listing of Martin R. Weiser journal articles
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View Martin R. Weiser's laboratory research.