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W. Edwin
Conner, MD
Dr. Conner
has practiced colorectal
surgery in Kansas City for over 30 years. Dr. Conner
received his medical degree from the University of
Maryland School of Medicine in Baltimore. He completed
his residency in general surgery at the Southern
Illinois University in Springfield, where he realized
that he enjoyed living in the Midwest.
Following his specialty training in colon and
rectal surgery at the Ochsner Clinic in New Orleans, he
returned to the Midwest in 1979 to join Dr. John W.
Heryer in practice; together, they were the first two
board-certified colon and rectal surgeons in Kansas.
Dr. Conner is a very active member
of the surgery faculty at The University of Missouri -
Kansas City School of Medicine and is the recipient of
the House Staff Teaching Award from the Resident Staff.
Dr. Conner’s special interests include
restorative surgery for inflammatory bowel disease and
sphincter-saving procedures for cancer.
Click here to see Dr. Conner's CV

Pierre Castera, MD
Dr. Castera earned his Bachelor of Science
degree in Biology at The University of Puerto Rico. He
attended medical school at The University of Puerto Rico
School of Medicine and completed his residency in
general surgery at the Stony Brook University Medical
Center in Long Island, New York.
He then served as a General Surgeon with the US
Army.
Shortly after fulfilling his military commitment, he
completed his fellowship in colorectal surgery at The
University of Texas at Houston.
Following
his specialty training, Dr. Castera began practicing in
Kansas City.
He has specialized in colorectal surgery for over 17
years; his special interests include
sphincter-preservation techniques for surgical removal
of rectal cancer, as well as laparoscopic intervention
for a minimally invasive alternative to open abdominal
surgery. Dr.
Castera is distinguished by his pioneering use of the
PPH stapling procedure for suitable hemorrhoid disease.
Dr. Castera is fluent in both English and
Spanish.
Click here to see Dr. Castera's CV

Lina O'Brien, MD
Dr. O'Brien
graduated cum laude in 1991 from the accelerated, six-year BS/MD program
offered by Pennsylvania State University in cooperation
with Jefferson Medical College.
She completed her general surgery residency at
Philadelphia’s Thomas Jefferson University Hospital in
1996. After
a year of researching hereditary colon cancer, Dr.
O’Brien secured her
colorectal surgery fellowship at Thomas Jefferson and
was subsequently appointed to the University Hospital
faculty.
As Clinical Assistant Professor of Surgery, Dr.
O’Brien collaborated with and trained both general and
colorectal surgery residents until she relocated to
Kansas City in 2001.
In addition to engaging in private practice, Dr. O’Brien
is involved in training the general surgery residents at
The University of Missouri - Kansas City School of
Medicine. Dr. O’Brien is especially interested in
treating rectal cancer with an emphasis on sphincter
preservation. She
also has extensive experience in laparoscopic surgery
for both malignant and benign disease.
Click here to see Dr. O'Brien's CV

Ben Mizrahi, MD
Dr. Mizrahi
graduated cum laude in 1995 with a Bachelor of
Science in Biology from the University of Miami.
He received his medical degree from University of
Vermont College of Medicine in 2003 and completed his
general surgery residency at the University of South
Florida in 2008. Prior to his colorectal surgery
fellowship at the Colorectal Clinic of Orlando, Dr.
Mizrahi elected to pursue an additional year of
sub-specialty training in minimally invasive colorectal
surgery and advanced rectal care management at Marks
Colorectal Clinic in Pennsylvania. He joins us
here at Colorectal Surgery Associates in September, 2010
immediately upon completion of his specialty training.
Dr.
Mizrahi is distinguished by his rectal cancer staging
techniques and his laparoscopic, minimally-invasive
approach to surgical removal of rectal and colon cancer.
Dr. Mizrahi’s special interests include: the
non-incision TEM (Transanal Endoscopic Microsurgery)
removal of low-lying rectal lesions; complex anorectal
disorders; pelvic floor dysfunction (constipation,
rectocele, incontinence, prolapse); and, of course,
sphincter-saving procedures for cancer removal.
Click here to see Dr.
Mizrahi's CV
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