1. Medullary carcinoma of thyroid  (Trust Mark: Doctor-Reviewed)
Medullary carcinoma of the thyroid is cancer of the thyroid gland that starts in cells that release a hormone called calcitonin. Such cells are called "C" cells.• Reviewer: Stephen Grund, MD, PhD, Chief of Hematology/Oncology and Director of the George Bray Cancer Center at New Britain General Hospital, New Britain, CT. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

2. Mastectomy  (Trust Mark: Doctor-Reviewed)
A mastectomy is the surgery to remove the entire breast. It is usually done to treat breast cancer.• Reviewer: James Lee, M.D., Department of Surgery, Columbia Presbyterian Medical Center, New York, NY. Review Provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.