A rare case of a giant phyllodes tumor with degeneration and bleeding: diagnosis and treatment difficulties

One of the leading problems worldwide in oncology and surgery is breast cancer. There were 2,261,419 newly diagnosed cases of breast cancer in 2020, which is 11.7% of the total number of diagnosed cases of malignant tumors of various localizations and is one of the leading causes of mortality in women. The diagnosis of breast cancer is often a difficult case when there is no histological verification of the tumor or the results are inconclusive. In these setting proper exclusion of benign masses is essential. Among the benign neoplasms, a special place is occupied by an extremely rare type of tumor - a phyllodes tumor, which makes up 0.3-0.5% of all breast tumors. A phyllodes tumor is a fibroepithelial neoplasm characterized by an extreme rate of development and the ability to transform into a malignant tumor (sarcoma). The current case report describes a giant phyllodes tumor with degeneration and bleeding the required emergency treatment.