Intravenous leiomyomatosis (metastasizing myoma).
D000328:Adult; D005260:Female; D006325:Heart Atria; D006338:Heart Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000556:secondary; D006801:Humans; D007889:Leiomyoma / Q000175:diagnosis* / Q000473:pathology / Q000556:secondary; D008854:Microscopy, Electron; D009362:Neoplasm Metastasis; D009369:Neoplasms / Q000175:diagnosis / Q000473:pathology; D014594:Uterine Neoplasms; D014682:Vena Cava, Inferior / Q000473:pathology