Case Report: Mitral valve obstruction by metastatic malignant phyllodes tumor.

Cardiac metastases from phyllodes tumors (PTs) are rare. Herein, we report a case of a 37-year-old female patient with a history of borderline breast PTs, admitted to the cardiology department for acute cardiac failure revealing concomitant cardiac and pulmonary metastases of malignant PTs. Cardiac metastasis occurred through direct extension from pulmonary metastasis to the left atrium via the right inferior pulmonary vein, causing severe mitral valve obstruction. Although the metastasis was surgically removed, the patient had an uncommon complication, which led to acute heart failure and huge relapse resulting in her death.