BACKGROUND: Lactating adenoma is an infrequent benign stromal breast tumor mostly seen during pregnancy and lactation. This report seeks to enhance the literature by presenting three cases diagnosed with this condition, while also highlighting its histological subtypes, immunohistochemical characteristics, and differential diagnoses. CONCLUSION: Pathohistological and immunohistochemical analysis should be performed to differentiate these lesions from other benign lesions and malignant tumors.