Ataxia-telangiectasia (AT) is a rare form of phakomatoses with multisystem lesions that are characterized by a specific neuro-cutaneous syndrome. AT is a multisystem disease that includes progressive clinical manifestations of cerebral ataxia, oculocutaneous telangiectasia, and increased susceptibility to cancer due to ionizing radiation sensitivity. Lack of awareness of this disease by medical providers could ultimately lead to a delay in diagnosis and increase morbidity in patients. This case study presents the history of a female adolescent patient, who was eventually placed in protective custody with congenital AT. She was clinically observed for fifteen years. This paper demonstrates the complexity of early diagnosis of AT in children. The importance of a comprehensive evaluation of neural and immunological systems, timely genetic testing, and aggressive treatment of infectious diseases is paramount in the formulation of an appropriate treatment plan. Early diagnosis and management significantly improve the prognosis and quality of life for these patients
