Dr. Marcus Aquino

Eric Haas is a Colorectal Surgeon practicing medicine in Houston, Texas. Dr. Haas is highly rated in 23 conditions, according to our data. His clinical expertise encompasses Diverticular Disease, Crohn's Disease, Colorectal Cancer, Hernia Surgery, and Endoscopy.

Mohummed Khani, MD completed his medical degree at the University of Aleppo – Faculty of Medicine in Syria. He went on to complete his general surgery residency at North Shore LIJ Health System in Staten Island, New York and his fellowship in colon and rectal surgery at St. Vincent Health System in Erie, Pennsylvania as well as Cleveland Clinic Foundation in Cleveland, Ohio. Dr. Khani chose to become a physician and specialize in surgery because he wanted to decrease suffering for all and help his patients. Fluent in English and Arabic, Dr. Khani is board certified in General Surgery by the American Board of Surgery and board certified in colon and rectal surgery by American Board of Colon and Rectal Surgery. He sees patients for the diagnosis and treatment of rectal pain, anal pain, abdominal pain, diarrhea, constipation, rectal bleeding, hemorrhoids, and more. He also sees patients for both diagnostic and screening colonoscopies. Dr. Khani’s clinical interests include minimally-invasive surgeries and robotic surgery for a variety of conditions including diverticulitis, colon cancer, rectal cancer, and inflammatory bowel diseases such as Crohn’s disease and ulcerative colitis. Dr. Khani builds good relationships with his patients as they compile a detailed medical history and make a strategy for helping the patient feel better again. He wants each of his patients to be pleased with their outcome, and the best part of his job is when he gets to see a patient out of surgery who is happy and feeling great. He truly loves his profession and what he gets to do every day. In his spare time, Dr. Khani enjoys swimming, playing tennis, watching basketball, traveling, and spending time with family. Dr. Khani is highly rated in 23 conditions, according to our data. His clinical expertise encompasses Ogilvie Syndrome, Familial Colorectal Cancer, Cholecystitis, Hemorrhoidectomy, and Hernia Surgery.

Born in Thessaloniki, Greece, Dr. Voloyiannis earned his medical degree at the Aristotle University of Thessaloniki Medical School and completed his Surgical Residency at Baylor College of Medicine, M.E. DeBakey Department of Surgery in Houston. Dr. Voloyiannis completed his fellowship in Colon and Rectal Surgery at The University of Texas Health Science Center at Houston (UTHealth) Medical School. He is Diplomate of both American Board of Surgery and American Board of Colon and Rectal Surgery. He is also Fellow of American College of Surgeons. Dr. Voloyiannis' main focus involves surgical and non-surgical colon and rectal procedures. He has a strong interest in the latest advances and performs minimally invasive laparoscopic surgeries, colonoscopies and hemorrhoid procedures. He spends much of his time listening to his patients, in the office or hospital, because he believes not only in treating complex conditions, but helping patients return to normal lives as soon as possible. His office staff is fluent in Spanish. Dr. Voloyiannis is highly rated in 11 conditions, according to our data. His clinical expertise encompasses Familial Colorectal Cancer, Colorectal Cancer, Lynch Syndrome, Hernia Surgery, and Ureteroscopy. Dr. Voloyiannis is currently accepting new patients.