Panitumumab administered by a central line infusion on days 1 and 15 of each 4 week cycle.

Panitumumab is administered intravenously (IV) by an infusion pump through a peripheral line or indwelling catheter using a 0.2 or 0.22-micron in-line filter infusion set-up over 1 hour 15 minutes. The starting panitumumab dose is 6 mg/kg administered every 14 days for as long as patients are on study without evidence of disease progression or demonstrating intolerance to treatment. The total dose may be rounded up or down by no greater than 10 mg. The panitumumab dose will be calculated based on the subject's actual body weight at each visit. Panitumumab will be diluted in a minimum of 100 mL of pyrogen-free 0.9% sodium chloride solution (normal saline solution, supplied by the site). The maximum concentration of the diluted solution to be infused should not exceed 10 mg/mL.

The response rate of single agent panitumumab among patients with KRAS wild-type (Kirsten rat sarcoma viral oncogene homolog) colorectal cancer previously treated with cetuximab. Inclusive of three patients with clinical progression prior to first re-staging CT scans. Response rate evaluated using RECIST (Response Evaluation Criteria In Solid Tumors). Best overall response is recorded from the start of the treatment until disease progression/recurrence (taking as reference for progressive disease the smallest measurements recorded since the treatment started).

RECIST:

Complete Response (CR): Disappearance of all target lesions Partial Response (PR): At least a 30% decrease in the sum of the LD (longest diameter) of target lesions Stable Disease (SD): Neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for PD Progressive Disease (PD): At least a 20% increase in the sum of the LD of target lesions

The duration of time from start of treatment to time of radiologic disease progression per RECIST or death, or otherwise the date of last tumor assessment. Median PFS was calculated using Kaplan Meier suvival analysis. Progressive disease is defined as having at least a 20% increase in the sum of the longest diameter (LD) of target lesions, taking as reference the smallest sum LD recorded since the treatment started or the appearance of one or more new lesions.

Panitumumab administered by a central line infusion over 1 hour 15 minutes on days 1 and 15 of each 4 week cycle. The starting panitumumab dose is 6 mg/kg, the total dose may be rounded up or down by no greater than 10 mg. The panitumumab dose is calculated based on the subject's actual body weight at each visit. Panitumumab is diluted in a minimum of 100 mL of pyrogen-free 0.9% sodium chloride solution. The maximum concentration of the diluted solution to be infused should not exceed 10 mg/mL.

The response rate of single agent panitumumab among patients with KRAS wild-type (Kirsten rat sarcoma viral oncogene homolog) colorectal cancer previously treated with cetuximab. Inclusive of three patients with clinical progression prior to first re-staging CT scans. Response rate evaluated using RECIST (Response Evaluation Criteria In Solid Tumors). Best overall response is recorded from the start of the treatment until disease progression/recurrence (taking as reference for progressive disease the smallest measurements recorded since the treatment started).

RECIST:

Complete Response (CR): Disappearance of all target lesions Partial Response (PR): At least a 30% decrease in the sum of the LD (longest diameter) of target lesions Stable Disease (SD): Neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for PD Progressive Disease (PD): At least a 20% increase in the sum of the LD of target lesions

One patient withdrawn for an infusion reaction prior to first re-staging CT scans.

Panitumumab administered by a central line infusion over 1 hour 15 minutes on days 1 and 15 of each 4 week cycle. The starting panitumumab dose is 6 mg/kg, the total dose may be rounded up or down by no greater than 10 mg. The panitumumab dose is calculated based on the subject's actual body weight at each visit. Panitumumab is diluted in a minimum of 100 mL of pyrogen-free 0.9% sodium chloride solution. The maximum concentration of the diluted solution to be infused should not exceed 10 mg/mL.