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Breast CareTeam

Breast Surgery

PinnacleHealth's nationally accredited breast surgeons' multi-disciplinary approach fulfills their mission to provide you with the best care. Treatments include minimally invasive biopsies, breast cancer risk counseling, in-office ultrasound and oncoplastic surgical procedures.

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Need more information? Our friendly staff can assist you. To get in touch, click here or call (717) 545-5000 for more information or to make an appointment.

Hours: Monday-Friday, 8 a.m.-4:30 p.m.

Video Profiles

Lisa Torp, MD, FACS Breast Surgeon


Brynn Wolff, MD, Breast Surgeon


Katherine Barton, MD, FACS, Breast Surgeon


Peggy Hummel, CRNP




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Lisa Torp, MD, FACS
Dr. Torp received her medical degree from the University of Miami School of Medicine. She completed her internship and residency at Penn State Milton S. Hershey Medical Center. She is board certified and a member of the American Society of Breast Surgeons.

Dr Torp has training in advanced breast surgical technique including oncoplastic breast surgery, breast conserving surgery including lumpectomies and skin-sparing and nipple-sparing mastectomies working closely with plastic surgeons who provide immediate breast reconstruction. She also has experience in minimally invasive biopsy and therapeutic breast procedures including ultrasound, steretactic and percutaneous mammotome excisions as well as placement of breast brachytherapy catheters.

Dr. Torp has practiced in the Harrisburg area for 16 years.


Brynn Wolff, MD
Dr. Wolff recently joined the PinnacleHealth Breast Care Center.

She  is a graduate of the Medical College of Virginia and completed her residency in general surgery at Penn State Milton S. Hershey Medical Center with a fellowship in breast oncology at the University of Pennsylvania.

Dr. Wolff  is board certified and a member of the American Society of Breast Surgeons.


Katherine Barton, MD, FACS
Dr. Barton joins us from Turlock, CA, where she practiced general
surgery with specialization in breast care for nine years.
After receiving her medical degree from the University of Virginia
Medical School in Charlottesville, VA, Dr. Barton completed her
residency at Carilion Roanoke Memorial Hospital in Roanoke, VA.
She is board certified by the American Board of Surgery and is a
Fellow of the American College of Surgeons.

Margaret Hummel, CRNP
Margaret ( Peggy) Hummel has 30+ years in nursing providing the highest level of care for women of all ages as an RN and as a Women's

Health Nurse Practitioner.  She is a graduate of the Geisinger Medical Center  School of Nursing and the Planned Parenthood Federation/ University of Penna. Nurse Practitioner Program

"Some say their decision to become a nurse happened after a life changing event, but for me it was always something I wanted to do.  My father, who was a teacher, told me I was the only second-grader he knew that said she wanted to be a nurse and went on to become a nurse. In nursing school I knew that Women's Health would be my niche as I constantly found ways to be on the Maternity floor.   My career has constantly evolved around Women's Health as I now find myself at the Breast Care Center.  My favorite thought is one by Albert Schweitzer ' Life becomes harder for us when we live for others, but it also becomes richer and happier.'"  Read Peggy's Blog for the Breast Care Center

Dr. Theresa Lee
Theresa Lee, MD
Dr. Lee joins our Medical Oncology team from Georgetown University Hospital Lombardi Comprehensive Cancer Center, where she completed a fellowship in Hematology and Medical Oncology. Dr. Lee has special expertise in breast medical oncology and is board certified in Internal Medicine.

Dr. Lee completed her medical education at the University of Maryland School of Medicine in Baltimore and her residency at Boston University Medical Center. Dr. Lee will see patients at the new Ortenzio Cancer Center at PinnacleHealth.
Kit Lu, MD
Dr. Lu joins our Medical Oncology team specializing in breast medical oncology. She is board certified in Internal Medicine and served as chief fellow at the National Heart, Lung and Blood Institute, National Institutes of Health. She received her medical degree from Florida State University College of Medicine in Tallahassee and completed her residency at Johns Hopkins Bayview Medical Center in Baltimore.

PinnacleHealth Breast Care Center
Community Campus
Medical Sciences Pavilion, Suite 202
4300 Londonderry Road
Harrisburg, PA 17109
(717) 545-5000
(717) 545-5002 (fax)
Hours: 8 a.m.-4:30 p.m., Monday through Friday

PinnacleHealth Breast Care Center, Mechanicsburg
Ortenzio Cancer Center at PinnacleHealth, Suite 200
2035 Technology Parkway
Mechanicsburg 17050
(717) 988-1450
(717) 221-5544 (fax)
Hours: 8 a.m.- 4:30 p.m., Monday through Friday

850 Walnut Bottom Rd
Carlisle 17013
Suite 103
(717) 545-5000
(717) 545-5002 (fax)
Hours: 8 a.m. - 4:30 p.m., Monday through Friday