Colorectal Surgeons


World Renowned Colon and Rectal Surgeons Dr. Sergio W. Larach and Dr. Sam Atallah work together with Elisa Bianchi and Annamarie Kondek to bring the very best advanced colon and rectal surgery options to the Central Florida community.

We utilize a state of the art surgery facility in Central Florida called Endo-Surgical Center of Florida as well as local hospitals.

Call today (407) 384-7388 to discuss your surgery options with our physicians.

  • Dr. Elisa Maria Bianchi
    Colorectal Surgeon in Orlando, FL

    Digestive and Liver Center of Florida

    Dr. Elisa Maria Bianchi is a Board-Certified General Surgeon who completed a Colorectal Surgery Fellowship at Zucker School of Medicine at Hofstra/Northwell Health in New York, where her specialty training encompassed a variety of small bowel, colon, rectal and anal pathologies which included malignant, benign and inflammatory disease (Crohn's disease and ulcerative colitis). She previously completed her residency in General Surgery at Loma Linda University Health with particular emphasis in robotic techniques.

    Dr. Bianchi completed her medical training at the University Illinois at Chicago. Prior to that she completed an undergraduate degree in Bioengineering at the University of Illinois and worked as an engineer at Abbott Laboratories. Dr. Bianchi is a fluent Spanish speaker.

    Elisa Bianchi prides herself on developing a close rapport with her patients and making sure that all medical options, not only surgery, are explored to optimally treat disease. She takes a holistic approach to the practice of medicine that is rooted in her desire to engage her patients as equal partners in shared medical decision-making.

  • Sam Atallah, MD FASCRS, FACS
    Director of Research & Clinical Trials Colon and Rectal Surgeon

    Dr. Atallah is among the most well known colorectal surgeons in the world. He moved to Orlando in 2007 after completing training at Houston's Texas Medical Center with Surgical Oncology training at MD Anderson Cancer Center where his training had earned him double-board certification in General Surgery and Colorectal Surgery. Two years to the day after completing fellowship training in colon & rectal surgery, Dr. Atallah performed the world's first TAMIS operation in Winter Park, FL on June 30, 2009. This created a new approach to treating rectal cancers and polyps, that is now being practiced in more than 50 countries. Dr. Atallah pioneered robotic transanal surgery and was the first in the world to perform this technique. He is one of the leaders in advanced technology for rectal cancer surgery and has developed the technique of stereotactic navigation for transanal total mesorectal excision (taTME) -- an important step forward in the evolution of computer-assisted surgery. Complex treatment of rectal cancer and surgical management of this disease through the new techniques of TAMIS and taTME represent Dr. Atallah's principal interests in colorctal surgery; and he is currently producing a textbook on these topics scheduled for 2019 publication by Springer Nature. He is also actively involved in the design and assessment of next-generation robotic systems that will be smaller, sleeker, and able to work in places and spaces never before

  • Sergio Larach, MD, FASCRS, FACS
    Colon and Rectal Surgeon

    Dr. Sergio Larach completed his fellowship at the University of Texas Medical School. He is board certified in colon and rectal surgery. He has published numerous articles on colon and rectal surgery, conducted clinical research, and authored book chapters in his specialty. Dr Larach has been selected as a 'Top Doctor in Orlando' by Orlando Magazine for several years

    His interests include the whole spectrum of colorectal issues, including colon and rectal cancer, inflammatory bowel disease, and ano-rectal diseases. Dr. Larach has become a pioneer in performing laparoscopic surgical procedures, and he recently developed the TAMIS procedure for the treatment of rectal tumors

    Dr. Sergio Larach has held multiple professional appointments through his career, including Program Director of Orlando Regional and Florida Hospital's Colon and Rectal Fellowship Program. He is currently a Clinical Associate Professor at University of Central Florida and Clinical Associate Professor at Florida State University.

    Dr. Sergio Larach is the Associate Director of International Advisory Affairs of the International Society of University of Colon and Rectal Surgeons. He is also a reviewer for Surgical Endoscopy.

Types of Surgery Performed

Hemorrhoid Aftercare

Abdominal Surgery

  • Surgical Treatment of Colon & Rectal Cancer (cancer surgery of the lower intestinal tract)
  • Laparoscopic and Robotic Surgery for the Colon and Rectum 
  • Minimally Invasive Colon and Rectal Surgery including Single-Site Laparoscopy
  • TAMIS – Transanal Minimally Invasive Surgery for Removal of Cancerous and Precancerous  Tumors of the Rectum
  • taTME – Transanal Total Mesorectal Excision
  • Colostomy Reversal
  • Laparoscopic ileostomy and Colostomy
  • Incisionless Stoma Construction
  • Repair of Colon and Small Bowel Fistula
  • Repair of Colon – Bladder Fistula
  • Minimally Invasive Surgery for Benign Disease (Diverticulitis, Colitis)
  • Surgery for Ulcerative Colitis (UC) and Crohn’s Disease
  • Laparoscopic and Robotic J-Pouch Surgery
  • Surgical and Medical Management of Colonic Inertia and Constipation
  • Robotic Resection and Rectopexy for Rectal Prolapse
  • Excision of Presacral Tumors
  • Advanced Minimally Invasive Techniques including Stereotactic Navigation for Pelvic Surgery, and Intra-Operative Fluorescent Angiography
  • Surgical Treatment of Rare Tumors and Special Problems of the Intestine (Carcinoid, GIST, Appendiceal Cancer, Mucocele)
  • Surgical Treatment of Rectal and Sigmoid Endometriosis
  • Laparoscopic Total Procto-colectomy
  • Repair of Parastomal Hernias and Stomal Prolapse
  • Complex and Revisionary Surgery

Anorectal Surgery

  • Surgical Management of Anal Cancer
  • Hemorrhoidectomy
  • Surgical Treatment of Hemorrhoid Bleeding
  • Surgical Treatment of Hemorrhoid Prolapse
  • Surgical Treatment of Rectal Prolapse (Altemeier and Delorme)
  • Excision of Thrombosed Hemorrhoid
  • Removal of Anal and Genital Warts
  • Laser Treatment of Anal Lesions and HPV
  • High Resolution Anoscopy with Operating Microscope
  • Removal of Anal Skin Tags
  • Anal Fistula Treatment
  • Treatment of Anal STDs, and HIV Ulcers
  • Treatment of Anal Infections and Abscesses
  • Complex Anal Fistula Treatment, Seton Placement, biologic plug
  • Chemical Sphincterotomy (Botox)
  • Fissure Treatment  /  Fissurectomy
  • Sphincterotomy
  • Dilation of Strictures
  • Endoscopic Evaluation of Small Bowel Pouch
  • Formalin Treatment for Proctitis
  • LIFT Procedure for Complex Fistula
  • Treatment of Crohn’s Related Fistula
  • THD, Transanal Hemorrhoidal Dearteriolization
  • Endorectal Advancement Flaps
  • Anodermal Flap Construciton
  • Surgical Treatment and Excision of Pilonidal Disease
  • Bascom Procedure
  • V-Y Plasty
  • Overlapping Sphincteroplasty for Fecal Incontinence
  • Sacral Nerve Stimulator implantation for Fecal Incontinence
  • Field Blocks and Other Treatment for Chronic Anal Pain and Proctalgia Fugax

Other Procedures

  • Central Vein Port Placement
  • Ventral Abdominal Hernia Repair
  • Abdominal Wall Reconstruction
  • Removal of Lipoma and Other Soft Tissue Tumors
  • Surgical Treatment of Bleeding Stoma and Verices

For more detail information, please click on the link for Dr. Sam Atallah's website:

Conditions Treated

Malignancy of the Intestinal Tract

  • Rectal Cancer
  • Colon Cancer
  • Adenocarcinoma of the Intestinal Tract
  • Metastatic Colon / Rectal Cancer
  • Stage I - IV Colon and Rectal Cancer
  • Bowel Cancer of Unknown Primary
  • Large and Small Bowel Lymphoma
  • Anal Cancer (Invasive and Pre-Cancer)
  • Anal Margin Cancer
  • Squamous Cell Carcinoma
  • Mixed Adeno-Squamous Cell Carcinoma of the Rectum
  • Melenoma of the Anus
  • GI Melanoma
  • Rare tumors of the intestine (GIST, Carcinoid)
  • Rare tumors of the pelvis (Presacral Tumors, Teratomas, Duplication Cysts)
  • Recurrent tumors of the Anus and Rectum

Inhereted Colorectal Cancer Syndromes

  • FAP (Familial Adenomatous Polyposis Syndrome)
  • HNPCC (Hereditary Non-Polyposis Colon Carcinoma)
  • DNA Mismatch Repair Gene Related Colon Cancer
  • Tumor Suppressor Gene Deletions (eg, p53)
  • MUT-Y and MYH (Autosomal Recessive Colon Cancer)
  • Gene-Test Negative Colon Cancer
  • Colon Cancer in Patients < 40 years of age

Inflammatory Bowel Disease

  • Crohn’s Disease of the Large and Small Intestine
  • Crohn’s Disease of Anus and Rectum
  • Ileocolic Crohn’s Disease
  • Complex Complications of Crohn’s (Fistulae, Abscess, Obstruction, Strictures)
  • Re-operative Surgery for Crohn’s Disease
  •  Ulcerative Colitis
  • Indeterminate Colitis
  • Rare, Mixed IBD/ Colitis
  • Infections Colitis
  • Microcytic Colitis
  • Collagenous Colitis
  • Lymphocytic Colitis
  • C-Diff Colitis
  • Special Problems of HIV / AIDS

Colostomy and Ileostomy Related Disorders

  • Para-stomal Hernias
  • Stoma Prolapse
  • Pyoderma Gangranosum
  • Parastomal Verices and Bleeding
  • Parastomal Dermatitis

Complex Hernias and Recurrent Hernias of the Abdominal Wall

  • Mesh related complication of the abdominal wall
  • Reconstruction of the GI system (takedown of a colostomy or ileostomy)
  • Repair of Bladder to Colon Fistula
  • Repair of Bladder to Small Bowel Fistula
  • Repair of Enterocutaneous Fistula (fistula from bowel to skin)
  • Abdominal Pain, Cramps, or Discomfort
  • Large and Small Bowel Obstruction (Blockage)

Functional GI Disorders

  • Diarrhea (Chronic, Recurrent, Watery)
  • Bloody Diarrhea
  • Changes in Bowel Habits
  • Constipation
  • Alteranting Diarrhea and Constipation
  • Irritable Bowel Syndrome (IBS)

Functional Disorders of the Pelvis

  • Pelvic Organ Prolapse
  • Rectal Prolapse
  • Multi-compartment Pelvic Organ Prolapse
  • Outlet Obstructive Defecation
  • Pelvic Pain
  • Rectocele Related Disorders
  • Solitary Rectal Ulcer Syndrome

Anal and Rectal Diseases

  • Fistulae of the Anus and Perianus
  • Dermal Disorders of the Perianus
  • Hyperpigmentation of the Anus (Dark Anal Skin)
  • Dry / Wet Anal Skin Disorders
  • Anal Leaking 
  • Special Skin Disorders of the Anoderm 
  • Pilonidal Disease (Initial and Recurrent)
  • Hidradenitis Suppurativa
  • Paget’s Disese of the Anus
  • Proctitis (Due to Infection or Inflammation)
  • Radiation Proctitis
  • Melanoma of the Anus
  • Fissures of the Anus
  • Atypical and Low Pressure Fissures of the Anus
  • HIV Ulcers of the Anus
  • Anal and Genital HPV (Human Papilloma Virus)
  • Anal and Genital Warts
  • Anal Dysplasia
  • Anal Pre-cancer (AIN I-III)
  • Anal and Rectal STDs (Sexually Transmitted Diseases)
  • Anal Discharge / Pain
  • Anal Stenosis
  • Anal Hygiene Problems (excess sweat and irritation)
  • Candida and other Dermal Infections (fungal, bacterial, viral)
  • Pruritus Ani (Anal itching)
  • Pinworms
  • Hirschsprung’s Disease


  • Thrombosed Hemorrhoid
  • Hemorrhoid Pain
  • Hemorrhoid Bleeding
  • Hemorrhoid Swelling / Buldging
  • Hemorrhoid – Internal and External Disease
  • Hemorrhoid – Grade I – IV
  • Recurrent Hemorrhoids After Surgery


Want to learn more about colorectal surgery from Digestive And Liver Center Of Florida? Call our Orlando, FL office at (407) 384-7388 for more information

Healing After Hemorrhoid or Anorectal Surgery

Contact Us