![Physician assistant Meredith Riffle, colorectal surgeon Martin Weiser, and nurse Nancy Evans](https://www.mskcc.org/sites/default/files/styles/medium/public/node/170506/3x2/weiser_clinic_180831_278_1200x800-1.jpg)
(From left) Physician assistant Meredith Riffle, colorectal surgeon Martin Weiser, and clinical nurse Nancy Evans are part of the close-knit team who care for people with anal cancer.
No matter your diagnosis, your MSK care team will provide treatments that offer the best chance to cure or control anal cancer while helping you maintain your quality of life.
Memorial Sloan Kettering’s anal cancer doctors, surgeons and other experts are some of the most experienced in the world. We take a collaborative approach to care so that you can benefit from the expertise of not just one doctor or oncologist but an entire team of experts. Our skill and deep level of experience, along with access to top-notch supportive services, means that we can offer you the best care possible.
Learn more about our experts.
Radiation Therapy
![Memorial Sloan Kettering radiation oncologist J. Isabelle Choi](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/183961/1x1/choi-j-isabelle_200122_24-1200x1200.jpg?h=cd2a7045)
Assistant Attending Radiation Oncologist
![Memorial Sloan Kettering radiation oncologist Christopher Crane](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/123991/1x1/crane_1200x1200.jpg?h=cd2a7045)
Attending Radiation Oncologist
![MSK radiation oncologist John Cuaron](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/106627/1x1/cuaron_150708_1200x1200.jpg?h=cd2a7045)
Lead Service Chief, External Beam Radiotherapy Service: Regional Care Network
![Daniel Gorovets, Memorial Sloan Kettering radiation oncologist](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/142168/1x1/gorovets_1200x1200.jpg?h=cd2a7045)
Assistant Attending Radiation Oncologist
![Carla Hajj, Memorial Sloan Kettering radiation oncologist](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/127558/1x1/haji-carla_210616_002-1200x1200.jpg?h=cd2a7045)
Associate Program Director and Medical Student Clerkship Director, Radiation Oncology Department, Memorial Sloan Kettering Cancer Center
![Borys R. Mychalczak, MD](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/449/image/mychalczak-borys-1x1.jpg?h=fbf7a813)
Chief, Radiation Oncology, MSK Westchester & MSK Bergen
![Marsha Reyngold, MD, PhD](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/34968/image/reyngold-140828-10-1x1.jpg?h=fbf7a813)
Assistant Attending Radiation Oncologist
![MSK radiation oncologist Paul Romesser](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/126850/1x1/romesser_1200x1200.jpg?h=cd2a7045)
Director of Colorectal and Anal Cancer, Department of Radiation Oncology
![Memorial Sloan Kettering radiation oncologist Diana Roth O'Brien](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/207706/1x1/roth-o-brien-diana_200817_10_1200x1200.jpg?h=cd2a7045)
Assistant Attending Radiation Oncologist
![Memorial Sloan Kettering radiation oncologist Jacob Y. Shin](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/181312/1x1/shin-jacob_1200x1200.jpg?h=cd2a7045)
Assistant Attending Radiation Oncologist
![Abraham J. Wu, MD](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/671/1x1/headshot-2020-1200x1200.jpg?h=cd2a7045)
Vice Chair, Graduate Medical Education Committee
Surgery
![Memorial Sloan Kettering surgeon Julio Garcia-Aguilar](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/18001/image/garcia-aguilar_0-1x1.jpg?h=fbf7a813)
Chief, Colorectal Service; Benno C. Schmidt Chair in Surgical Oncology
![Surgeon Garrett Nash](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/452/1x1/nash_1200x1200.jpg?h=cd2a7045)
Vice Chair for Quality and Safety, Department of Surgery
![Memorial Sloan Kettering surgeon Emmanouil Pappou](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/147448/1x1/pappou_171107_1200x1200.jpg?h=cd2a7045)
Assistant Attending Surgeon
![Philip B. Paty, MD](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/490/image/paty-philip_0-1x1.jpg?h=fbf7a813)
Attending Surgeon, Talcott Chair for Clinical Excellence
![J. Joshua Smith, MD, PhD](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/105272/1x1/jesse-joshua-smith_1200x1200.jpg?h=cd2a7045)
Associate Attending Surgeon
![Memorial Sloan Kettering surgeon Iris Wei](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/145168/1x1/wei_170721_1200x1200_0.jpg?h=cd2a7045)
Assistant Attending Surgeon
![Memorial Sloan Kettering surgical oncologist Martin Weiser](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/660/1x1/weiser_clinic_180831_301r_1200x1200_0.jpg?h=cd2a7045)
Vice Chair for Faculty Affairs, Department of Surgery; Stuart H.Q. Quan Chair in Colorectal Surgery
![Memorial Sloan Kettering colorectal surgeon Maria Widmar](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/181318/1x1/widmar_1200x1200.jpg?h=cd2a7045)
Assistant Attending Surgeon
Medical Oncology
![Memorial Sloan Kettering Medical Oncologist Fiyinfolu Balogun](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/209461/1x1/balogun-fiyinfolu_200818_02_1200x1200.jpg?h=cd2a7045)
Assistant Attending Physician
![Memorial Sloan Kettering medical oncologist Andrea Cercek](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/112/1x1/2017msk_mp_04_colorectal53rd_310.nef.1200x1200.jpg?h=cd2a7045)
Section Head, Colorectal Cancer; Co-Director, Center for Young Onset Colorectal and Gastrointestinal Cancers
![Memorial Sloan Kettering Medical Oncologist Sree B. Chalasani](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/18314/image/sree-chalasani-1x1.jpg?h=fbf7a813)
Associate Attending Physician
![Memorial Sloan Kettering medical oncologist Louise Connell](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/165988/1x1/connell-louise_181005_14_1200x1200.jpg?h=cd2a7045)
Assistant Attending Physician
![Samuel Cytryn](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/292766/1x1/cytryn-samuel-231219-06_rt-1200x1200.jpg?h=cd2a7045)
Assistant Attending Physician
![Avni Desai, MD](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/17654/image/desai-1x1.jpg?h=fbf7a813)
Associate Attending Physician
![Andrew S. Epstein, MD](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/17500/image/epstein-andrew-1x1.jpg?h=fbf7a813)
Associate Attending Physician
![Memorial Sloan Kettering medical oncologist Zoe Goldberg](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/236/1x1/goldberg_4116_1200x1200.jpg?h=cd2a7045)
Associate Attending Physician
![Memorial Sloan Kettering medical oncologist Ping Gu](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/159925/1x1/gu_180619_08_lowres_1200x1200.jpg?h=cd2a7045)
Associate Attending Physician
![Memorial Sloan Kettering medical oncologist Smita Joshi](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/182113/1x1/joshi-smitha_190916_13_1200x1200_0.jpg?h=cd2a7045)
Assistant Attending Physician
![Medical oncologist Jia Li](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/121903/1x1/li_1200x1200.jpg?h=cd2a7045)
Associate Attending Physician
![Parisa Momtaz, MD](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/109013/1x1/momtaz_1200x1200.jpg?h=cd2a7045)
Medical Director, Strategic Partnerships; Clinical Director, Melanoma Service
![Memorial Sloan Kettering medical oncologist Maliha Nusrat](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/188545/1x1/nusrat-maliha_191217_14_1200x1200.jpg?h=cd2a7045)
Assistant Attending Physician
![Memorial Sloan Kettering medical oncologist Diane Reidy Lagunes](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/518/1x1/180221-km-msk-lagunes-26r_1200x1200.jpg?h=cd2a7045)
Vice Chair of Oncology Operations, Regional Care Network; Past President, MSK Medical Staff; Creator and Host, Cancer Straight Talk Podcast
![Leonard Saltz, MD](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/546/image/saltz-leonard-1x1.jpg?h=fbf7a813)
Executive Director for Clinical Value & Sustainability; Head, Colorectal Oncology Section
![Marina Shcherba, DO](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/35184/image/shcherba-140813-11-1x1.jpg?h=fbf7a813)
Associate Attending Physician
![Memorial Sloan Kettering medical oncologist Ryan Sugarman](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/179542/1x1/sugarman-ryan_1200x1200.jpg?h=cd2a7045)
Medical Site Director, MSK Nassau; Medical Director, Strategic Partnerships
![Anna M. Varghese, MD](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/19776/image/varghese-anna-1x1.jpg?h=fbf7a813)
Associate Attending Physician
![Rona D. Yaeger, MD](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/674/1x1/yeager_1200x1200.jpg?h=cd2a7045)
Associate Attending Physician
![Memorial Sloan Kettering medical oncologist Jessica Yang](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/180586/1x1/yang_1200x1200.jpg?h=cd2a7045)
Assistant Attending Physician
![Medical oncologist Alice Zervoudakis](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/122686/1x1/zervoudakis_1200x1200.jpg?h=cd2a7045)
Clinical Director, Gastrointestinal Oncology Service
Gastroenterology
![Memorial Sloan Kettering gastroenterologist David Faleck](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/160327/1x1/faleck_180612_10_1200x1200.jpg?h=cd2a7045)
Director of Inflammatory and Immune-Related Bowel Diseases
![Memorial Sloan Kettering gastroenterologist Hans Gerdes](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/219/1x1/gerdes_1200x1200.jpg?h=cd2a7045)
Attending Physician
![Emmy Ludwig, MD](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/397/image/ludwig-emmy-1x1.jpg?h=fbf7a813)
Associate Attending Physician
![Memorial Sloan Kettering Gastroenterologist Arnold Markowitz](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/408/image/markowitz-arnold-1x1.jpg?h=fbf7a813)
Attending Physician
![Memorial Sloan Kettering gastroenterologist Robin Mendelsohn](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/425/1x1/mendelsohn_1200x1200.jpg?h=cd2a7045)
Co-Director, Center for Young Onset Colorectal and Gastrointestinal Cancers
![Memorial Sloan Kettering gastroenterologist Makoto Nishimura](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/157636/1x1/nishimura_180423_03_1200x1200.jpg?h=cd2a7045)
Attending Physician
![Memorial Sloan Kettering gastroenterologist Mark Schattner](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/559/1x1/schattner_180912_13_1200x1200.jpg?h=cd2a7045)
Chief, Gastroenterology, Hepatology and Nutrition Service
![Memorial Sloan Kettering gastroenterologist Pari Shah](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/18020/image/pari-shah-1x1.jpg?h=fbf7a813)
Associate Attending Physician
![Moshe Shike, MD](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/579/image/111107-shike-072-1x1.jpg?h=fbf7a813)
Attending Physician
Radiology
![Memorial Sloan Kettering radiologist James L. Fuqua, MD](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/210/1x1/fuqua-james_200221_07-1200x1200.jpg?h=cd2a7045)
Associate Attending Radiologist
![Marc J. Gollub, MD, FACR](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/239/image/gollub-marc-1x1.jpg?h=fbf7a813)
Director, Colorectal Radiology
![MSK radiologist Iva Petkovska](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/125920/1x1/petkovska_1200x1200.jpg?h=cd2a7045)
Associate Attending Radiologist
Pathology
Assistant Attending Physician
![Memorial Sloan Kettering surgical pathologist Jinru Shia](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/578/1x1/shia_170724_1200x1200.jpg?h=cd2a7045)
Director, Gastrointestinal Pathology
![Memorial Sloan Kettering pathologist Carlie Sigel](https://www.mskcc.org/sites/default/files/styles/width_200_1x1/public/node/12968/1x1/sigel-carlie_171108_1200x1200.jpg?h=cd2a7045)
Director, Gastrointestinal Pathology Fellowship Program
Social Work
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