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Context: The polycystic ovary syndrome (PCOS) is frequently associated with visceral obesity, suggesting that omental adipose tissue might play an important role in the pathogenesis of the syndrome.

Objective: The objective was to study the expression profiles of omental fat biopsy samples obtained from morbidly obese women with or without PCOS at the time of bariatric surgery.

Design: This was a case-control study.

Settings: We conducted the study in an academic hospital.

Patients: Eight PCOS patients and seven nonhyperandrogenic women submitted to bariatric surgery because of morbid obesity.

Interventions: Biopsy samples of omental fat were obtained during bariatric surgery.

Main Outcome Measure: The main outcome measure was high-density oligonucleotide arrays.

Results: After statistical analysis, we identified …