A One-Year Study To Evaluate The Efficacy And Safety Of CP-690,550 For Patients With Moderate To Severe Chronic Plaque Psoriasis

Inclusion Criteria:

• 18 years or older with diagnosis for at least 12 months of moderate to severe plaquepsoriasis covering at least 10% of body surface area

• A Psoriasis Area and Severity Index (PASI) score of 12 or greater

• Are considered to be candidates for systemic or light therapy

• Have no evidence of active or latent tuberculosis

Exclusion Criteria:

• Non-plaque or drug-induced forms of psoriasis

• Cannot discontinue current oral, injectible or topical therapy for psoriasis or cannotdiscontinue phototherapy (PUVA or UVB)

• Any uncontrolled significant medical condition