This study will compare three standard treatment programs commonly offered to patients with breast cancer. The three programs being compared are 1) Mindfulness Meditation-Based Stress Reduction (MBSR), 2)Supportive- Expressive Group Therapy (SET), and 3) A one day stress-management seminar. The purpose of this study is to determine if these three treatments have different effects on psychological well-being, the immune system, and the amount of stress hormones in the bloodstream.

Inclusion Criteria:

• Study participants must be women diagnosed with Stage I, II, or III breast cancer within the previous 18 months, have completed all treatments with the exception of hormonal therapy at least three months previously, over the age of 18, and have a score of 13 or higher on the BSI-18. Previous meditation/yoga experience is allowed but will be recorded.

Exclusion Criteria:

• Participants must not have a concurrent DSM-IV diagnosis of psychosis, substance abuse, bipolar disorder, or active suicidality (as assessed by structured clinical interview), must not be currently using psychotropic medications (antipsychotics, antidepressants, anxiolytics), have a concurrent autoimmune disorder, or have participated previously in MBSR or SET group.