Morphologically, it is characterized by monotonous, alveolar-like globular clusters of low-grade carcinoma cells with peripheral palisading, rather than the usual single filing or isolated cells commonly associated with ILC, classic type. Due to this unique morphology, it can be misdiagnosed as LCIS, DCIS, or low-grade IDC, NST due to overlapping morphology and E-cadherin expression. The gene discussed is CDH1; the disease is ductal breast carcinoma in situ.