2131 Background: To determine the systemic plasma levels, safety and maximum tolerated dose (MTD) of a depot formulation of paclitaxel, OncoGel (paclitaxel/ReGel). This is a cremophor-free formulation which is liquid at administration temperature and rapidly forms a gel depot upon injection. The depot slowly degrades over several weeks allowing controlled release of paclitaxel within the tumor. Methods: A Phase I, dose-escalation study was conducted in 16 end-stage cancer patients with 18 superficially accessible solid malignant lesions at 6 investigative sites. Four paclitaxel dosages based on tumor volume were administered with 3 patients receiving 0.06 mg/cm3, 3 patients at 0.24 mg/cm3, 6 patients with 8 tumors at 0.48 mg/cm3, and 4 patients at 1.92 mg/cm3. There were 7 females and 9 males, ages 41 to 89, with treated tumors ranging from 0.7 cm3 to 19.0 cm3. The primary diagnoses included lymphoma, melanoma, lung, head and neck, laryngeal, thyroid, and breast cancer. Results: Blood samples were collect...