Insulin Dependent Diabetes Mellitus (IDDM) is a medical condition characterized by high blood sugar levels due to the body's inability to produce insulin. There are several synonyms for IDDM, such as Type 1 Diabetes, Juvenile Diabetes, and Autoimmune Diabetes. These terms are used interchangeably and refer to the same condition. Type 1 Diabetes is used because it is the most common form of diabetes diagnosed in young people. Juvenile Diabetes is also used because it typically presents in childhood and adolescence. Autoimmune Diabetes is used because it occurs when the body's immune system attacks and destroys insulin-producing cells in the pancreas. Overall, these synonyms describe a condition that requires careful management and insulin therapy to prevent complications.