The most important of these are Compression of the superior vena cava (SVC): Shortness of breath and facial edema (SVC syndrome) Compression of the external biliary tree: Jaundice Compression of the ureters: Hydronephrosis Bowel obstruction: Vomiting and obstipation Interference with lymph drainage: Chylous pleural or peritoneal fluid or lymphedema of a lower extremity The skin is involved in some non-Hodgkin lymphomas.