EXHIBIT 10.1 FIRST AMENDMENT TO LEASE THIS AGREEMENT (hereinafter referred to as the "Amendment") made as of the16 day of March 2001, between 826 NEWTOWN ASSOCIATES, L.P., a Delaware limited partnership, whose address is C/O First Evergreen, 101...Lease • May 14th, 2001 • Cytogen Corp • In vitro & in vivo diagnostic substances
