Invasive Breast Carcinoma Arising in Microglandular Adenosis: Two Case Reports
- Invasive Breast Carcinoma Arising in Microglandular Adenosis: Two Case Reports
- 배영경; 최정은
- ACINIC CELL-CARCINOMA; MAMMARY-CARCINOMA
- Issue Date
- KOREAN BREAST CANCER SOC
- JOURNAL OF BREAST CANCER, v.16, no.4, pp.432 - 437
- Microglandular adenosis (MGA) is a rare benign disease that shows an infiltrative growth pattern of small glands, and it may progress to include atypia and carcinoma. Here we report two cases of breast carcinoma arising in MGA. Case 1 was a 44-year-old woman with a previous history of ductal carcinoma in situ in her right breast. During a follow-up, a 1.8 cm mass-like lesion was found in her left breast. An excisional biopsy suggested that the lesion was breast carcinoma. Case 2 was a 57-year-old woman with a 2.9 cm mass in her right breast. A core needle biopsy of the lesion suggested invasive carcinoma. Both patients underwent modified radical mastectomy with sentinel lymph node biopsy. Both tumors lacked a myoepithelial cell layer and stained positively for S-100, lysozyme, and alpha 1-antitrypsin, which is typical of MGA. Both cases showed invasive carcinoma arising in MGA.
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