Ornithine Transcarbamylase Deficiency Disease, also known as OTC deficiency, is a rare genetic disorder that affects the body's ability to break down nitrogen in the urea cycle. This condition leads to a buildup of ammonia in the blood, which can be toxic and potentially life-threatening. Individuals with OTC deficiency often experience symptoms such as vomiting, seizures, and coma. Despite its complex and lengthy name, OTC deficiency is commonly referred to as hyperammonemia, urea cycle disorder, or simply OTC deficiency. While these terms may be less specific, they provide a more accessible way to discuss and understand this condition.