50. A 40-year-old woman is found to have microcalcifications on screening mammography. Stereot
biopsy shows malignant epithelial cells confined within ducts, forming cribriform and comedo patterns
with central necrosis, rosis, but no invasion beyond the basement membrane. Which of the following is the
most appropriate diagnosis?

(A) Invasive lobular carcinoma

(C) Lobular carcinoma in situ (LCIS)

(B) Ductal carcinoma in situ (DCIS)

(D) Fibrocystic changes with epithelial hyperplasia