This document provides a case study of an 18-year-old female patient, Ms. A, who was admitted to the hospital with uncontrolled Type 1 diabetes mellitus. It discusses her medical history and family history of diabetes. It also defines key terms related to diabetes like glucose, insulin, and symptoms of uncontrolled diabetes like polyuria and polydipsia. Additionally, it provides background on the anatomy and physiology of the endocrine system, pancreas and processes involved in gluconeogenesis.