1 Gently rub a pumice stone back and forth across the affected area for three to five minutes and then pat dry your feet. 2  Dip a cotton ball in castor oil and place it on the corn. Secure it with tape and leave it on overnight.  The next morning, remove the bandage and apply castor oil several times a day.
1. I am confused regarding the presence of valves in the superior vena cava. The superior vena cava does not possess valves unlike inferior vena cava, which possesses Eustachian Valve.
Venogram shows almost complete occlusion of superior vena cava with dramatic collateral drainage through left superior intercostal vein. Superior vena cava syndrome (case 1, continued). Palmaz P308 stent mounted on 12-mm balloon was deployed in superior vena cava after it was predilated to 8 mm. Stent was subsequently dilated to 14 mm.