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Mammograms, Diagnostic Testing, Surgery

Beebe's Center for Breast Health offers individualized treatment with the support of Medical, Radiation and Surgical Oncologists, care providers, and Breast Health Nurse Navigators who are with you during your entire journey. Breast health is more than just cancer. Preventive care, risk assessments, and breast biopsies and surgery for patients are all part of the comprehensive care provided by our multidisciplinary team. We also follow women who are at an increased risk for developing breast cancer.

Beebe Center for Breast Health

Beebe’s surgical breast oncologists Diana Dickson-Witmer, MD, and Matthew Richards, MD, along with oncoplastic breast surgeon Karen Barbosa, DO, offer advanced techniques and expertise that makes the Center the best in Sussex County. The Center prioritizes appointments when you need comprehensive care the most with three locations in Sussex County, including Rehoboth Beach, Milford, and our South Coastal Cancer Center in Millville. Breast cancer doesn't wait, and neither should you.

The best Breast Health is here at Beebe Healthcare. To make an appointment, call 302-703-3595, or click to learn more about our program.


Dr. Diana Dickson-Witmer

Get to Know Dr. Diana Dickson-Witmer

A board certified surgeon, Dr. Diana Dickson-Witmer joins Beebe with decades of experience and expertise in the field of breast surgery and oncology. She leads the Beebe Center for Breast Health.

Dr. Dickson-Witmer graduated from the University of Florida College of Medicine. She also served a residency there, as well as at the Medical Center of Delaware, where she was chief surgical resident in 1982.

In addition to her surgical and patient care experience, Dr. Dickson-Witmer is known for her trailblazing work in the field of breast surgery – setting the standard and developing the programs to train future surgeons in the field.

To make an appointment call 302-703-3595

Dr. Matthew Richards

Get to Know Dr. Matthew Richards

Matthew Richards, MD, is a board certified surgeon who joins Beebe Healthcare following completion of a comprehensive breast surgical oncology fellowship at ChristianaCare Health System. Working in the Helen F. Graham Cancer Center, he collaborated with radiation and medical oncologists, pathologists, genetic specialists, and plastic surgeons to provide integrated, multi-disciplinary care for patients through their journey of breast cancer treatment. In tandem, Dr. Richards devoted much time to clinical research, with particular interest in triple negative breast cancer, breast cancer screening, and care for transgender patients.

Additionally, Dr. Richards pursued a surgical residency at Drexel University College of Medicine with focus on surgical, trauma, and burn intensive care, and at Crozer Chester Medical Center, where he served as chief surgical resident for the organization’s newly established surgical residency program. He earned his medical degree at Jefferson Medical College.

To make an appointment call 302-703-3595

Dr. Karen Barbosa

Get to Know Dr. Karen Barbosa

Karen Barbosa, DO, FACOS, is a fellowship-trained oncoplastic breast surgeon who works at the Beebe Center for Breast Health. Dr. Barbosa is a board certified surgeon who offers the latest, most advanced techniques in oncoplastic breast surgery. She is committed to the delivery of state-of-the-art care and the availability of a broad palette of surgical treatment options for patients to consider and choose from.

Dr. Barbosa is passionate about education and makes it a priority to get to know her patients, answer their questions, and point them toward the right resources for achieving and maintaining good breast health – from routine mammograms to risk assessment and genetic testing. She is proud to be part of a team of specialists who are committed to the achievement of optimized long-term outcomes for every patient, in a culture that values and embraces personalized, holistic care.

To make an appointment call 302-703-3595

Mimi Hilderley, MSN, FNP-BC

Get to Know Mimi Hilderley

Mimi Hilderley, MSN, FNP-BC, APRN, CNOR, is a nurse practitioner who practices at the Beebe Center for Breast Health. She provides specialized care for new and existing patients, with focus on the treatment of both benign and malignant conditions of the breast. She addresses abnormal mammograms, breast lumps, breast pain, nipple discharge, and breast infections, and also supports patients in need of post- operative and follow-up care. Mimi also advocates for breast cancer prevention and surveillance, and helps patients understand their risk based on their personal and family history, and overall breast health.

Mimi earned a two Bachelor of Science degrees; one in in Nursing from Utica College in Liverpool, New York, and another in Biology from Binghamton University, in Vestal, New York. She went on to complete her Master of Science degree to become a Family Nurse Practitioner at South University in Tampa, Florida. Mimi is certified as an Advanced Practice Registered Nurse (APRN) in both Delaware and Florida, and is a Certified Operating Room Nurse (CNOR). Mimi is a member of the Delaware Coalition of Nurse Practitioners

To make an appointment call 302-703-3595

Topics In This Digital Resource


Diagnosing Breast Cancer: Mammogram Screening

The American Cancer Society reports that as many as 1 in every 8 women in the United States will develop breast cancer at some time in her life. Women diagnosed in early stages of breast cancer have a better chance of long-term survival than in later stages when it has spread, which is why annual check-ups and screenings are critical so that treatment can start as early as possible.

If you are concerned you have found a lump in your breast, talk to your provider immediately about scheduling a mammogram.

Beebe offers advanced 3D mammography, breast MRI, and breast ultrasound as part of its comprehensive breast health program.

Mammogram Services:

  • Personalized patient navigation services
  • Digital mammography
  • Images read on-site; urgent cases evaluated within 24 hours
  • Breast ultrasound
  • Surgeons available for consultation, often within 48 hours
  • Minimally invasive breast biopsies
  • Private consultation area
  • A mindful and supportive atmosphere
  • Follow-up services and care coordination with referring physician

Following Your Mammogram - Additional Testing & Treatment

Following a mammogram, your provider and care team will discuss the results with you. If your mammogram shows an area of concern, your provider will likely schedule the following tests:

  • Ultrasound
  • Breast MRI
  • Stereotactic Needle biopsy
  • Ultrasound-guided biopsy

Beebe medical oncologists work closely with your care team, which includes your primary care provider, diagnostic imaging and radiology teams, radiation oncologists, and surgical oncologists. The team works with you to determine your needs and your preferences for treatment.

Breast Cancer Treatment at Beebe

Treatment options for breast cancer will depend on the type of cancer you have, its stage, size, and your overall health. Your individualized treatment plan may include surgery as well as chemotherapy or radiation therapy.

Learn more about breast cancer treatment and surgical options available at Beebe Healthcare.


Survivorship: After Breast Cancer Treatment

After your breast cancer treatment, you may want to find additional support resources to support you in your wellness and health. Beebe Oncology offers community Survivorship programs and other resources.



Are you concerned about breast pain or a lump? Do you have an upcoming procedure and have questions? Beebe's Nurse Navigators can help.


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