Chair of Colorectal Surgery for Main Line Health
Main Line Health
John H Marks, MD., FACS, FASCRS, is an internationally renowned colorectal surgeon with recognized areas of expertise in rectal cancer management and laparoscopic and robotic surgery. He is currently the Director of the Colorectal Surgery Center and Chief of the Section of Colorectal Surgery for The Main Line Health System at the Lankenau Medical Center in Wynnewood, Pennsylvania, USA. He is the Director of a Fellowship in Minimally Invasive Colorectal Surgery and Advanced Rectal Cancer Management as well as a colorectal surgical research team. As one of the world’s most experienced colorectal surgeons, he has performed nearly 3000 minimally invasive colorectal cancer surgeries, including more than 1400 rectal cancer procedures. Dr. Marks’ research and educational programs focus largely on minimally invasive laparoscopic and robotic colorectal surgery featuring radical sphincter preservation resection for rectal cancer after neoadjuvant therapy, one of the largest series of its kind in the world. He champions Full Thickness Local Excision (FTLE) by the Transanal Endoscopic Microsurgical (TEM) method following neoadjuvant therapy for rectal cancer and has performed over 400 TEMs to date. Dr. Marks remains on the leading edge of advancements in colorectal surgery, having performed over 300 single-incision laparoscopic surgeries (SILS). He is currently collaborating on applications for robotic single port surgery to expand endoluminal and SILS for a variety of pathologies and Lankenau is one of the first three centers in the world to have the new SP robot. With Dr. Marks leading Lankenau Medical Center, one of four academic colorectal robotic Epicenters in the country, he has performed over 300 surgeries with the da Vinci Surgical System Si and Xi robots and the newest SP robotic system. Examples of his leadership in this field include training surgeons in Hong Kong and performing the first SP robot cases in the western hemisphere.