Terms: » Organ Systems » Gastrointestinal System » Oesophagus » Disturbance of differentiation and growth:Abnormalities,maldevelopment,change of shape and position,disturbance in building-up process

1. Series: 31012001 56 year old patient with dyspagia. A tumor of soft tissue was described in upper mediastinum on plain X-ray of the thorax. What is this mass in the upper mediastinum?