Atypical Breast Hyperplasia may present either as Atypical Ductal Hyperplasia or Atypical Lobular Hyperplasia. Which of these two is considered the more “pre-malignant”? Is surgical excision necessary for all atypical breast hyperplasia? Who qualifies for tamoxifen? And, how does breast tomosynthesis fit into the management scheme? We will dive into these questions and more in this session.