[A Case of Ductal Carcinoma In Situ in Sclerosing Adenosis].

A 67-year-old female was referred to our hospital because she was pointed out mass in her right breast by her previous doctor. Core needle biopsy examination was performed at that time which revealed invasive ductal carcinoma. There'reno palpable masses in her breast or any superficial lymph nodes on her visiting our hospital. Breast ultrasonography images showed multiple nodules in C area of right breast. Breast enhanced MRI image revealed multiple enhanced nodules which showed rapid arising and plateau or slowly decreasing pattern in time intensity curve. CT scan and bone scintigraphy revealed no distant metastasis. Based on these findings, the case was diagnosed as right breast cancer, cT1N0M0, Stage I . For this case, we performed right mastectomy and sentinel lymph node biopsy. The pathological findings was ductal carcinoma in situ (DCIS)accompanied by sclerosing adenosis. Though we didn't perform adjuvant chemotherapy, she has been alive without recurrence for 6 years. Because it's difficult to make correct diagnosis with small specimen collected by core needle biopsy, we should take DCIS in sclerosing adenosis into consideration to prevent overdiagnosis.