title: [Clinical features and imaging findings of intravenous leiomyomatosis].
abstract: OBJECTIVE
  To explore the clinical features and imaging findings of intravenous leiomyomatosis (IVL).
  
  
  METHODS
  The clinical features and imaging findings of 9 patients with pathologically confirmed IVL were retrospectively analyzed.
  
  
  RESULTS
  Out of these 9 patients, there were 5 first-episode patients and 4 recurrent patients. Five patients had a history of uterine leiomyoma.Inferior vena cava (IVC) were involved in all 9 patients. The tumor extended through IVC into right heart chamber in 7 patients, among whom tumor were initially arisen from pelvic vessels in 6 patients. The first-episode symptoms included chest tightness and shortness of breath (n=4), edema of low extremity (n=2), abdominal distention (n=2), and menorrhagia (n=1). Tumors in pelvis/venous system and right heart cavity appeared as hypoechoic mass under ultrasound examinations, and hypodense mass with mottled enhancement were observed on contrasted CT. Tumors appeared to be isointense to muscles on T1-weighted images and slightly hyperintense on T2-weighted images.
  
  
  CONCLUSIONS
  IVL has certain clinical history and lesion locations. Combined imaging examinations are helpful in the early diagnosis, surgery planning, and follow-up of IVL.
authors.affiliation: Department of Radiology, PUMC Hospital, CAMS and PUMC, Beijing 100730, China.
authors.forename: Xian-jing
authors.initials: XJ
authors.lastname: Peng
authors.forename: Zheng-yu
authors.initials: ZY
authors.lastname: Jin
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D018231:Leiomyomatosis / Q000175:diagnosis*; D008875:Middle Aged; D012189:Retrospective Studies; D019043:Vascular Neoplasms / Q000175:diagnosis*; D014680:Veins