Background: Know the WHO classification of rare breast tumors, among which are mentioned: Acinar cell carcinoma, Adenoid cystic carcinoma, Secretory carcinoma, Mucoepidermoid carcinoma, Polymorphic adenocarcinoma, High cell carcinoma with inverted polarity and Neoplasms neuroendocrine. As well as some rare histological strains such as: Metaplastic carcinoma, Ring cell carcinoma, specific subtypes of ductal carcinoma (mucinous, tubular, medullary and papillary), lymphoid and hematopoietic neoplasms, mesenchymal neoplasms (malignant phyllodes and sarcomas) , granular cell tumor and metastases. Each of these neoplasms has different epidemiological, clinical, radiological and prognostic characteristics which determine their management.
Learning Objectives: 1- Review the WHO classification for rare tumors and rare strains. 2- Know the clinical and epidemiological characteristics of unusual histological strains of breast cancer. 3- Describe the imaging and histologic features of uncommon diagnostic features of breast cancer.
Abstract Content/Results: A series of 30 cases of patients with the following diagnoses is presented: Adenoid cystic carcinoma, Secretory carcinoma, Mucoepidermoid carcinoma, Metaplastic carcinoma, Ring cell carcinoma, Specific subtypes of ductal carcinoma (mucinous, tubular, medullary and papillary), Lymphoid and hematopoietic neoplasm, Mesenchymal neoplasms (malignant phyllodes and sarcomas), Granular cell tumor ( GCTs) and Metastasis. A review of clinical, epidemiological, radiological and histological characteristics of each tumor is carried out.
Conclusion: Familiarization with these less frequent or rare forms is important to be able to make a correct diagnostic approach, since the definitive diagnosis will always be histopathological, its recognition is essential due to its prognostic implications since many of them do not have guidelines regarding management. well-defined clinical features and are treated by extrapolation from the most common types of cancer.
