Question category: Endocrinology
A 25 year old patient presents with polyuria and polydipsia. A fasting glucose is 9mmol/l. She states that she has a strong family history of diabetes with her father, grandfather and 2 of her uncles have diabetes who all developed it at a young age. Her BMI is 23. She is commenced on gliclazide and gains very good control. What is the most likely diagnosis?