Fig. 8. Multiple small cysts. A: Ductal epithelial hyperplasia. US (left) shows several small cysts in a localized area. Histopathology (right, hematoxylin and eosin stain) from core needle biopsy shows multiple cysts and epithelial hyperplasia. B: Low-grade DCIS. US (left) shows clustered small cysts; a small solid portion (arrow) is suspected. Histopathology (right, hematoxylin and eosin stain) from core needle biopsy shows a flat, low papillary, and cribriform type of DCIS. US = ultrasound, DCIS = ductal carcinoma in situ.