Many patients remain without a diagnosis despite extensive medical evaluation. The Undiagnosed Diseases Network (UDN) is established to apply a multidisciplinary model in the evaluation of the most challenging cases and to identify the biologic characteristics of newly discovered diseases.
The patients who are referred to the UDN are evaluated over a period of 20 months. The patients are required to have an undiagnosed condition despite thorough evaluation by a health care provider. It is determined the rate of diagnosis among patients who subsequently have a complete evaluation.
The UDN establishes a diagnosis in 132 of the 382 patients who have a complete evaluation, yielding a rate of diagnosis of 35%. Further information you can find here.