“…Most patients are usually asymptomatic, 17 and 90% of patients have symptoms suggestive of a pelvic mass, such as irregular vaginal bleeding, hypermenorrhea, menostaxis, abdominal swelling, or unexplained pelvic pain 19 ; when it compresses the ureter, it can lead to urinary tract obstruction. 20 In the middle stage, it extends out of the pelvic cavity to the renal vein or inferior vena cava and can gradually lead to edema and heaviness of the lower extremities. 21 In the late stage, it reaches the right atrium or the pulmonary artery, and chest discomfort, dyspnea and syncope develop, 22 and as the condition worsens, congestive heart failure occurs, 23 even pulmonary embolism 24 and sudden death.…”