Efficacy and Tolerability of BAF312 in Patients With Polymyositis

This study was stopped prematurely due to overall slow recruitment and no evidence for
efficacy in a parallel study in dermatomyositis with an assumed similar pathophysiology. With
very small sample sizes per group the overall results for this study including primary and
all other efficacy and PD data are inconclusive

Inclusion Criteria:

- "definite" or "probable" for polymyositis at least three months before Baseline

- active disease as defined by elevated CK levels, or other enzymes, or MRI/biopsy if
enzymes are normal, and persisting muscle weakness

- stable dose of corticosteroid for at least 2 weeks prior to Baseline and should not
have received a medium or high dose in the last 8 weeks prior to study entry.

- patients treated with methotrexate must have been on a stable dose for at least 6
weeks prior to Baseline.

Exclusion Criteria:

- Patients with overlap polymyositis, late-stage polymyositis, or other types of
myositis.

- Preexisting severe cardiac or pulmonary involvement, malignancy of any organ system or
significant eye diseases.

- Uncontrolled diabetes mellitus or diabetes complicated with organ involvement.

- Pregnant or nursing (lactating) women