Osteoclast-like stromal giant cells in invasive ductal breast cancer: A case series

•“Osteoclast-like stromal giant cells” is a rare pattern of invasive ductal carcinoma.•The origin and mechanism for developing osteoclast-like giant cells is unknown.•Misleading diagnosis: in >50 % of cases the mammography suggests an erroneous diagnosis of benign lesion.•Controversial prognostic significance of OLGCs.