Dr. John Charles Byrn MD
Colon and Rectal Surgeon
27 Straight St Holland MI, 49424About
Dr. John Byrn is a colon and rectal surgeon practicing in Iowa City, IA. Dr. Byrn specializes in the diagnosis and treatment of diseases of the colon, rectum and anus. As a colon and rectal surgeon, Dr. Byrn often treats conditions like rectal cancer, colon cancer, hemorrhoids, anal fissures and diverticulitis. Colon and rectal surgeons may be referred to you by your gastroenterologist if your doctor believes you need a surgical procedure.
Board Certification
Colon & Rectal SurgeryAmerican Board of Colon & Rectal SurgeryABCRS
SurgeryAmerican Board of SurgeryABS
Provider Details
Expert Publications
Data provided by the National Library of Medicine- Small-bowel perforation after colonoscopy.
- Three-dimensional imaging improves surgical performance for both novice and
- Internal hernias: clinical findings, management, and outcomes in 49 nonbariatric cases.
- Non-physician practitioners' overall enhancement to a surgical resident's experience.
- Development of an improved risk calculator for complications in proctectomy.
- Effect of BMI on outcomes in proctectomy.
- Crohn's disease but not diverticulitis is an independent risk factor for surgical site infections in colectomy.
- Differences in short-term outcomes among patients undergoing IPAA with or without preoperative radiation: a National Surgical Quality Improvement Program analysis.
- Factors associated with conversion from laparoscopic to open colectomy using the
- Impact of urinary tract infection definitions on colorectal outcomes.
- Postoperative complications and patient satisfaction: does payer status have an impact?
- Identifying modifiable factors associated with postoperative ileus.
- Right Colectomy and Abdominal Perineal Resection for Cancer: Do Urinary Tract Infections Impact Outcomes?
- Robotic proctectomy for rectal cancer: analysis of 71 patients from a single institution.
- Surgeon Variation in Complications With Minimally Invasive and Open Colectomy: Results From the Michigan Surgical Quality Collaborative.
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