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Sam Atallah, MD, FACS, FASCRS

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Board-Certified Colon & Rectal Surgeon

  • Founder of TAMIS Technique
  • Certified Robotic Surgeon
  • Fellowship-Trained Specialist
Medical Group
Request an Appointmentor call us407.303.2615

In 2007, Dr. Atallah joined Florida Hospital after completing training at Houston’s Texas Medical Center with Surgical Oncology training at MD Anderson Cancer Center. Two years to the day after completing fellowship training in colon and rectal surgery, Dr. Atallah performed the world’s first TAMIS operation (at Winter Park Hospital) on June 30, 20091. This created a new approach to treating rectal cancers and polyps, which is now being practiced in over 16 countries world-wide12. Dr. Atallah has also pioneered robotic transanal surgery3,4,10,13,14, and has been the first to describe this new technique as well. Other areas of Dr. Atallah’s research interest include understanding the tumor biology of colon cancer at the molecular level. He is the principle investigator of a major study looking at biologic tumor markers which can lead to a better understanding of cancer tumors. This study is in collaboration with Sanford & Burnham Labs and is funded by a Bankhead-Coley grant. Other than cancer surgery, and operative management of inflammatory bowel disease, his other areas of specialty include minimally invasive treatments for hemorrhoids, especially the ‘no-cutting’ operation called Transanal Hemorrhoidal Dearterialization (THD), and treatment of dysplasia. Dr. Atallah is one of the few experts in the Orlando area to perform High Resolution Anoscopy for detection and treatment of AIN (Anal Intra-epithial Neoplasia).

Dr. Atallah is world renowned for his work in rectal cancer surgery and has given several invited lectureships. In the past year, he has lectured at the European Association of Endoscopic Surgeons’ 14th World Congress in Paris, France; The Natural Orifice Surgery Consortium for Assessment and Research in Chicago; The Society of Robotic Surgeons of Orlando; The American College of Surgeons in Washington, DC and The Peking University Conference on Advanced Rectal Cancer Surgery in Beijing, China. He is scheduled in 2015 to lecture on robotic transanal surgery in Spain, Taiwan and Portugal. Dr. Atallah has also served as a panelist for the National Advisory Board for Colon Cancer Screening on the implementation of sDNA as a screening modality, and recently served as lead faculty to train surgical sub-specialists on the new techniques he has pioneered at The Center for Future Surgery, University of California, San Diego. He has authored 21 peer-reviewed publications in 2013-2014 alone, most of which focus on innovations in surgery. Last updated February, 2015.


  1. Invented TAMIS (Transanal Minimally Invasive Surgery)1
  2. Invented RTS (Robotic Transanal Surgery)3,4
  3. Invented NOTES Hysterectomy using TAMIS techniques8
  4. Piloted Stereotactic Surgery with Image Navigation for Rectal Cancer Surgery9
  5. Co-founded the ACGME accredited Colon & Rectal Surgery Fellowship Training Program, Florida Hospital
  6. Double Board Certified in General Surgery and Colorectal Surgery
  7. Fellow, American College of Surgeons and American Society of Colon & Rectal Surgeons
  8. Fellowship, Colon & Rectal Surgery, University of Texas Medical School-Houston, Houston, TX
  9. Residency, General Surgery, University of Texas Medical School- Houston, Houston, TX
  10. Medical Degree, The University of Texas-Southwestern Medical School, Dallas, TX
  11. America’s Top Surgeons Award
  12. Orlando’s Top Docs, 2011, 2012, 2013, 2014
  13. Patients’ Choice Award
  14. Compassionate Doctor Award


  1. Atallah S, Albert M, Larach S. Transanal minimally invasive surgery: a giant leap forward. Surg Endosc. 2010 Sep;24(9):2200-5. doi: 10.1007/s00464-010-0927-z. Epub 2010 Feb 21.
  2. Atallah S, Albert M, deBeche-Adams T, Larach S.Transanal minimally invasive surgery (TAMIS): applications beyond local excision. Tech Coloproctol. 2013 Apr;17(2):239-43. doi: 10.1007/s10151-012- 0945-z. Epub 2012 Dec 4.
  3. Atallah SB, Albert MR, deBeche-Adams TH, Larach SW.Robotic TransAnal Minimally Invasive Surgery in a cadaveric model.Tech Coloproctol. 2011 Dec;15(4):461-4. doi: 10.1007/s10151-011-0762- 9. Epub 2011 Sep 28.
  4. Atallah S, Parra-Davila E, deBeche-Adams T, Albert M, Larach S. Excision of a rectal neoplasm using robotic transanal surgery (RTS): a description of the technique. Tech Coloproctol. 2012 Oct;16(5):389- 92. doi: 10.1007/s10151-012-0833-6. Epub 2012 May 15.
  5. Atallah S, Albert M, deBeche-Adams T, Nassif G, Polavarapu H, Larach S.Transanal minimally invasive surgery for total mesorectal excision (TAMIS-TME): a stepwise description of the surgical technique with video demonstration. Tech Coloproctol. 2013 Jun;17(3):321-5. doi: 10.1007/s10151-012-0971-x. Epub 2013 Feb 2.
  6. Albert MR, Atallah SB, deBeche-Adams TC, Izfar S, Larach SW. Transanal minimally invasive surgery (TAMIS) for local excision of benign neoplasms and early-stage rectal cancer: efficacy and outcomes in the first 50 patients. Dis Colon Rectum. 2013 Mar;56(3):301-7. doi: 10.1097/DCR.0b013e31827ca313.
  7. Atallah SB, Albert MR, deBeche-Adams TC, Izfar S, Larach S. Application of laser-assisted indocyanine green fluorescent angiography for the assessment of tissue perfusion of anodermal advancement flaps. Dis Colon Rectum. 2013 Jun;56(6):797. doi: 10.1097/DCR.0b013e31828e1b71.
  8. Atallah S, Martin-Perez B, Albert M, Schoonyoung H, Quinteros F, Hunter L, Larach S.Vaginal Access Minimally Invasive Surgery (VAMIS): A New Approach to Hysterectomy. Surg Innov. 2014 Nov 27. pii: 1553350614560273. [Epub ahead of print]
  9. Atallah S, Nassif G, Larach S. Stereotactic navigation for TAMIS-TME: opening the gateway to frameless, image-guided abdominal and pelvic surgery.Surg Endosc. 2014 Jun 28. [Epub ahead of print]
  10. Atallah S, Martin-Perez B, Pinan J, Quinteros F, Schoonyoung H, Albert M, Larach S.Robotic transanal total mesorectal excision: a pilot study. Tech Coloproctol. 2014 Nov;18(11):1047-53. doi: 10.1007/s10151-014-1181-5. Epub 2014 Jun 24.
  11. Atallah SB, deBeche-Adams TC, Larach S. Transanal minimally invasive surgery for repair of rectourethral fistula. Dis Colon Rectum. 2014 Jul;57(7):899. doi: 10.1097/ DCR.0000000000000136. No abstract available.
  12. Martin-Perez B, Andrade-Ribeiro GD, Hunter L, Atallah S. A systematic review of transanal minimally invasive surgery (TAMIS) from 2010 to 2013. Tech Coloproctol. 2014 Sep;18(9):775-88. doi: 10.1007/s10151-014-1148-6. Epub 2014 May 7.
  13. Atallah S, Nassif G, Polavarapu H, deBeche-Adams T, Ouyang J, Albert M, Larach S. Robotic-assisted transanal surgery for total mesorectal excision (RATS-TME): a description of a novel surgical approach with video demonstration. Tech Coloproctol. 2013 Aug;17(4):441-7. doi: 10.1007/s10151-013-1039-2. Epub 2013 Jun 26. Review.
  14. Atallah S, Quinteros F, Martin-Perez B, and Larach S. Robotic transanal surgery for local excision of rectal neoplasms. Journal of Robotic Surgery. June 2014, Volume 8, Issue 2, pp 193-194.
  15. Atallah S.  Robotic transanal minimally invasive surgery for local excision of rectal neoplasms (Br J Surg 2014; 101: 578-581).  Br J Surg. 2014 Apr;101(5):581. doi: 10.1002/bjs.9467
  16. Atallah S, Martin-Perez B, Albert M, deBeche-Adams T, Nassif G, Hunter L, Larach S.  Transanal minimally invasive surgery for total mesorectal excision (TAMIS-TME): results and experience with the first 20 patients undergoing curative-intent rectal cancer surgery at a single institution.  Tech Coloproctol. 2014 May;18(5):473-80. doi: 10.1007/s10151-013-1095-7. Epub 2013 Nov 23.
  17. Atallah S.  Transanal minimally invasive surgery for total mesorectal excision. Minim Invasive Ther Allied Technol. 2014 Jan;23(1):10-6. doi: 10.3109/13645706.2013.833118. Epub 2013 Sep 1. Review.
  18. Atallah SB, Albert MR.  Transanal minimally invasive surgery (TAMIS) versus transanal endoscopic microsurgery (TEM): is one better than the other?  Surg Endosc. 2013 Dec;27(12):4750-1. doi: 10.1007/s00464-013-3111-4. Epub 2013 Jul 27.
  19. Atallah SB, Larach S, deBeche-Adams TC, Albert MR.  Transanal minimally invasive surgery (TAMIS): a technique that can be used for retrograde proctectomy.  Dis Colon Rectum. 2013 Jul;56(7):931. doi: 10.1097/DCR.0b013e318292ed7e.


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