Normal breast with lobular carcinoma in situ (LCIS) in an enlarged cross-section of the lobule

Breast profile:
A Ducts
B Lobules
C Dilated section of duct to hold milk
D Nipple
E Fat
F Pectoralis major muscle
G Chest wall/rib cage

Enlargement
A Normal lobular cells
B Lobular cancer cells
C Basement membrane