This area is under the Wilhelm Foundation responsibility. In this section Wilhelm Foundation will collect some information (phenotypic, genotypic, picture) from undiagnosed rare patients. For this purpose a dedicated ethics-Informed Assent as well as a UDNI Parental Consent were developed and apporved during the 6th Conference of Undiagnosed Diseases Network International (19-21 June 2018, Naples) by all UDNI Board Members and participants. Before adding information on a patient these consents have to be download and signed by the Responsibles of patient. Patients must have undergone a specific visit in a dedicated undiagnosed clinical site before being added in the present section.