Whether right upper mediastinal space is serious or not cannot be generalized. Benign tumors, generally not serious; malignant tumors, mostly belong to the more serious. 1. Benign tumors: right upper mediastinal space, if it is due to benign tumors, generally not serious, through surgery to remove the tumor, can achieve the purpose of cure, so not serious. 2. Malignant tumor: If the right upper mediastinal space is caused by malignant tumor, there may be spreading and metastasis of cancer cells, and even cause invasion of neighboring organs, so it is a more serious disease, and surgery should be taken as early as possible to remove the cancerous tissues, and then according to the pathological results of radiotherapy and chemotherapy and other measures should be carried out. Right superior mediastinal space occupation should seek medical treatment in time and follow the doctor’s prescription.