{
  "abstract": "A woman in her 50s with bilateral lower extremities pitting oedema and dyspnoea for 3 months was admitted to hospital. Transthoracic echocardiography revealed a 7.2 cm×5.6 cm, hypoechoic mass in the left atrium. Colour Doppler flow imaging demonstrated no blood flow signals within the mass ( figure 1A,B). Cardiac CT scan demonstrated a soft tissue density lobulated mass in the left atrium with heterogeneous slight enhancement (figure 1C,D). Non-visualisation of the left pulmonary vein was observed. To further evaluate the lesion, the patient underwent contrast-enhanced cardiac magnetic resonance. The mass showed broad-based low T1-weighted signal (figure 1F), inhomogeneous slightly lower T2-weighted signal (figure 1G), inhomogeneous gadolinium enhancement (figure 1H) and inhomogeneous late gadolinium enhancement (figure 1I), which clearly delineated the central non-enhancement area and tumour invasion into the left superior and inferior pulmonary veins. Magnetic resonance cine sequences are provided as online supplemental videos 1 and 2. Due to tumour involvement of the left superior and inferior pulmonary veins, the patient underwent surgical resection of the left atrial mass combined with left pneumonectomy.",
  "authors": [
    {
      "affiliations": [
        "Department of Radiology, The Second Hospital of Dalian Medical University, Dalian, Liaoning, China"
      ],
      "name": "Xin-Rui Yu"
    },
    {
      "affiliations": [
        "Department of Ultrasound, The Second Hospital of Dalian Medical University, Dalian,Liaoning, China"
      ],
      "name": "Xi Yang"
    },
    {
      "affiliations": [
        "Department of Ultrasound, The Second Hospital of Dalian Medical University, Dalian,Liaoning, China"
      ],
      "name": "Guang-Sen Li"
    }
  ],
  "title": "Bilateral oedema and dyspnoea: when a left atrial mass obscures pulmonary venous flow",
  "uid": "3ad07568-813b-53dc-9db8-5503119f5f00"
}