Patients with polycystic ovary syndrome who are thin are also at high risk for type 2 diabetes, independent of their weight. Patients with polycystic ovary syndrome (PCOS) may be at risk for diabetes because they are thin, but they are not. Patients with polycystic ovary syndrome (PCOS) are at risk of developing type 2 diabetes and it is not related to whether the patient is overweight or not. This was confirmed by the results of a recent study reported at the International Conference on Endocrinology 2014, which previously suggested an association between PCOS and type 2 diabetes, but whether weight is also a factor in the increased risk of diabetes in PCOS patients has not been clarified. What is the risk of type 2 diabetes in lean polycystic ovary syndrome patients? Is it associated with no weight? The researchers looked at data from the Australian National Health Insurance database, including information on whether they had polycystic ovary syndrome, type 2 diabetes or hypertension, as well as weight and height. The researchers calculated BMI values based on the survey information. The results showed that both polycystic ovary syndrome (PCOS) and body weight were associated with the risk of developing type 2 diabetes. An increase in BMI in women with polycystic ovary syndrome (PCOS) did not change the risk of type 2 diabetes. In women without PCOS, the risk of type 2 diabetes increased with BMI. Polycystic ovary syndrome (PCOS) is a common and complex condition that affects both reproductive and metabolic system function, and patients with PCOS are at high risk for diabetes from a young age, independent of whether they are obese or not. Patients with polycystic ovary syndrome should be aware of the importance of regular screening for diabetes risk and taking the necessary preventive measures, regardless of fatness. The consensus of reproductive endocrinologists and experts in exercise, nutrition, and diabetes also emphasizes that patients with polycystic ovary syndrome should have a multidisciplinary approach to control, treatment, and reversal.