[Mesothelioma of the septum interatriale (author's transl)].

Sudden death of a 21-year-old women. The cause of death was mesothelioma situated in the region of the interatrial septum that has been manifested since childhood as a complete heart block. Neither gravidity nor delivery led to the aggravation of her state of health. The cause of this heart lesion, which was the mentioned rare tumor, was discovered only during the autopsy.