The purpose of this study is to evaluate the effectiveness of Leukine to decrease the need for steroid treatment for Crohn's disease.

On 29 May 2009, Bayer began transitioning the sponsorship of this trial to Genzyme. NOTE: This study was originally posted by sponsor Berlex, Inc. Berlex, Inc. was renamed to Bayer HealthCare, Inc.

Inclusion Criteria:

• You must have active Crohn's disease at screening and been diagnosed with Crohn's disease within 6 months at screening.
• You must have steroid dependent disease (receiving between 10-40 mgs/day prednisone therapy for greater than 3 months prior to screening and had at least one unsuccessful attempt to reduce cortico-steroids due to worsening of disease).
• You must be able to give yourself an injection of study drug or have another person help you give the injection.
• You must not be pregnant and agree to use birth control if you are a sexually active male or female of childbearing potential.

Exclusion Criteria:

• You may not be taking medications not allowed on this study.
• You may not have had GI surgery or bowel obstruction in the last 6 months.
• You may not have ever taken this drug or drugs of similar type in the past.