title: Spontaneous Round-Shaped Left Atrial Hematoma.
abstract: Spontaneously occurring left atrial hematomas are very rare and most of them followed acute clinical course due to hemodynamic deterioration. We presented a case of gradually developing hematoma protruding into the left atrial cavity as a round mass, which was completely encapsulated with intact endocardial wall. Emergency surgery was successfully performed. Histopathological study demonstrated subendocardial-aged hematoma with papillary endothelial hyperplasia.
authors.affiliation: Division of Cardiovascular Surgery, National Hospital Organization, Kagoshima Medical Center, Kagoshima, Japan.
authors.forename: Keisuke
authors.initials: K
authors.lastname: Kawaida
authors.affiliation: Division of Cardiovascular Surgery, National Hospital Organization, Kagoshima Medical Center, Kagoshima, Japan.
authors.forename: Yukinori
authors.initials: Y
authors.lastname: Moriyama
authors.affiliation: Division of Cardiovascular Surgery, National Hospital Organization, Kagoshima Medical Center, Kagoshima, Japan.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Fukumoto
authors.affiliation: Division of Cardiovascular Surgery, National Hospital Organization, Kagoshima Medical Center, Kagoshima, Japan.
authors.forename: Takayuki
authors.initials: T
authors.lastname: Ueno
keywords: cardiac surgery; cardiovascular disease; excision; hemodynamics; repair; ultrasound