<prompt> All are true about SVC superior vena cava syndrome except:Malignant lymphoma is the leading cause of SVC syndrome in elderly ptsWidening of superior mediastinum is seen on chest radiographPresent with dilated neck veins increased number of collateral veins covering the anterior chest wall.None of the above  <response>: SUPERIOR VENA CAVA SVC SYNDROME MC cause is lung cancer Small cell and squamous cell carcinoma along with lymphoma and metastatic tumors responsible for more than 90 of all SVC syndrome. In young adults, malignant lymphoma is the leading cause of SVC syndrome. Characteristic physical findings are dilated neck veins, increased number of collateral veins covering the anterior chest wall, cyanosis, and edema of the face, arms chest. Diagnosis Most significant chest radiographic finding is widening of the superior mediastinum MC right side CT Scan: Investigation of choice. 