Study to Determine the Safety, Maximum Tolerated Dose, Pharmacokinetics of Sorafenib (BAY43-9006)

MTD was determined by testing increasing doses up to 400 mg twice daily (bid) on dose escalation cohorts 1 to 3 with 3 patients each. MTD reflects highest dose of drug that did not cause an unacceptable side effect (= Dose Limiting Toxicity (DLT) in more than 30% of patients; e.g., hematologic toxicities like Common Toxicity Criteria (CTC) Grade 4 Neutropenia in specific conditions, platelets < 25,000 cells/mL; specific non-hematologic/biochemical toxicities CTC Grade 3 or 4; additionally, any toxicity considered by the investigator severe enough was designated a DLT); CTC Version 2 were used.

Participants are considered at risk for toxicity if participants had a lab measurement for the toxicity >= National Cancer Institute Common Toxicity Criteria (NCI CTC) Grade 3 as defined by the NCI CTC version 2; SGOT: Serum Glutamic-Oxaloacetic Transaminase, SGPT: Serum Glutamic-Pyruvic Transaminase, AST: Aspartate Aminotransferase, ALT: Alanine Aminotransferase.

Tumor Response (= Best Overall Response) of a subject was defined as the best tumor response (confirmed Complete Response (CR), confirmed Partial Response (PR), Stable Disease (SD), or Progressive Disease (PD)) observed during trial period assessed according to the Response Evaluation Criteria in Solid Tumors (RECIST) criteria. CR was defined as disappearance of tumor lesions, PR was defined as a decrease of at least 30% in the sum of tumor lesion sizes, SD was defined as steady state of disease, PD was defined as an increase of at least 20% in the sum of tumor lesions sizes.

The AUC is a measure of systemic drug exposure, which is obtained by collecting a series of blood samples and measuring the concentrations of drug in each sample. A plot of concentration vs time after dosing is created, and the area under this curve is calculated by standard methods (eg, trapezoidal rule) to provide a measure of how much drug was in the bloodstream following dosing.

Cmax refers to the highest plasma concentration of drug reached after dosing. It is obtained by collecting a series of blood samples after dosing, and analyzing them for drug content by a sensitive and specific analytical method. The highest measured concentration is referred to as the Cmax.

Tmax refers to the time after dosing when a drug attains its maximum concentration in the blood. It is obtained by collecting a series of blood samples at various times after dosing, and measuring them for drug content. The time corresponding to the highest measurable concentration (Cmax) is referred to as Tmax.

The responses reported in these participants were from start of treatment until 18 Sep 2008.

Frequency Threshold for reporting Other Adverse Events: 5%. The responses reported in these participants were from start of treatment until 18 Sep 2008.