The TSC Differential Diagnosis App is an educational app developed to provide support for physicians in the lengthy and complicated diagnosis of tuberous sclerosis complex (TSC). TSC is a rare genetic disorder that may cause non-cancerous tumors to form in vital organs including the kidneys (renal angiomyolipomas) and brain (SEGAs), as well as the heart, lungs and skin. Signs and symptoms of TSC vary depending on which system and which organs are involved. The TSC Differential Diagnosis App will take into account this daunting multitude of factors and helps physicians arrive at a suspect/probable/definite TSC diagnosis classification. The app also provides background and relevant information on each feature of the disease.