Challenges in papillary tumors of breast.

This review addresses common diagnostic challenges associated with papillary breast tumors-a rare but significant category of breast lesions. Despite their low incidence, papillary tumors are frequently encountered in breast pathology consultation practice due to their overlapping terminology and perplexing immunohistochemical results. Issues regarding assessment of invasive carcinoma in the setting of solid papillary carcinoma and encapsulated papillary carcinoma are covered. Emerging entities, such as tall cell carcinoma with reversed polarity and invasive lobular carcinoma mimicking solid papillary carcinoma, are discussed. Additionally, pragmatic guidance is provided for managing papillary breast tumors on needle core biopsy. Herein, we aim to provide clarity and confidence to surgical pathologists dealing with papillary breast tumors-mammary Medusa-equipping them with practical knowledge to better navigate this complex area of breast pathology.