In this video ataxia-telangiectasia is explained with the help of a case study followed by the associated genetics, pathology, clinical manifestations and available management options. Timeline: 0:00 - Sample case for diagnosis of ataxia-telangiectasia (AT) 1:08 - Genetic defects in AT 1:30 - Pathophysiology behind AT 4:06 - Clinical Manifestations, complications and laboratory findings 6:08 - Treatment and management options