About Colorectal Surgical Associates

Specializing in Colon Cancer and Hemorrhoid Surgery in Kansas City

Founded in 1991 to continue the 20 year tradition established by Drs. W. Edwin Conner and John W Heryer as Kansas City’s leading colorectal specialists, Colorectal Surgical Associates, PC was created by Drs. Edwin Conner, Pierre Castera, and Lina O’Brien. Colorectal Surgical Associates is proud to continue the legacy Dr. Conner began in 1979 by providing excellent colon and rectal care, in combination with advanced surgical techniques, to treat patients suffering from diseases of the intestines, colon, rectum, and anus.

The physicians of Colorectal Surgical Associates are committed to treating patients as individuals, to communicating their medical care in a manner that patients can understand, and to developing trusting doctor-patient relationships in order to foster the best possible treatment outcomes.

Colorectal Surgeons


Hospital and Surgical Center Affiliations in Kansas and Missouri

Our office is affiliated with the following hospital(s) and surgical center(s):