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Medullary Carcinoma
Medullary carcinoma is a kind of invasive ductal carcinoma (IDC) named for its similarity in color to brain tissue (the medulla). The cells are often poorly differentiated, which means that they look less like normal cells than well-defined ones.
This type of breast cancer accounts for as much as 7% of all breast cancer diagnoses and occurs most frequently in women in their late 40s and early 50s.
Medullary carcinoma is often difficult to diagnose. It tends to be of high grade, but has a better prognosis than other breast carcinomas. Lymph node involvement tends to be less frequent and the 1-year survival rate is as high as 92%.