Unexpected Clinical Status of Phyllodes Tumor of the Breast: Massive Bleeding.

Regardless of whether they are benign or malignant, phyllodes tumors can behave unpredictably and aggressively. Sometimes they grow so quickly and can cause clinically different, rare, and difficult situations to manage. Because of these characteristics, they can be fatal, even if they are benign. Sometimes, emergency surgical operations may be required due to the occurrence of these conditions even before the diagnosis. We report the first case of a massive bilateral phyllodes tumor, which causes severe bleeding because of rapid growth, which resulted in emergency surgery performed after a blood transfusion. The pathological diagnosis had not yet been confirmed at the time we operated on the patient, and the postoperative pathologic examination revealed that it was a phyllodes tumor. After the successful surgical operation, the patient recovered and was discharged. In this case report, we shared the presentation and management of the emergency phyllodes tumorous phenomenon. We also conveyed our views on what could have been done differently in the management of the presented case.