According to the 2019 World Health Organization classification of tumors of the breast, papillary breast lesions are divided into intraductal papillomas, intraductal papillary carcinomas, encapsulated papillary carcinomas, encapsulated papillary carcinomas with invasion, solid papillary carcinomas in situ, solid papillary carcinomas with invasion and intraductal papillary adenocarcinoma with invasion. They are rare tumors that pose a challenge for all doctors involved in making a diagnosis. They are a biologically, clinically, radiologically and histologically heterogeneous group of tumors that includes both benign, precursor, and malignant lesions. It is also important to distinguish between non-invasive and invasive tumors among malignant lesions. The main imaging methods for diagnosing breast diseases are mammography, ultrasound and magnetic resonance imaging. Radiologically suspicious breast lesions are sampled with a core-needle biopsy or a vacuum-assisted biopsy and the final diagnosis is made based on the pathohistological findings and the presence of certain cytomorphological and immunophenotypic characteristics. The main common histological characteristic of all papillary tumors is the presence of a papilla, usually with an arborizing fibrovascular tree, which is not the characteristic of a healthy breast tissue. The problem lies in the fact that papillary lesions sometimes have overlapping morphological and immunophenotypic properties, which makes it difficult for pathologists to establish a diagnosis and then we are faced with a problem of both overdiagnosing and underdiagnosing those tumors. In this thesis, the clinical, radiological and pathohistological characteristics of each tumor from this group is discussed, as well as recommendations for their treatment.