On October 16-19, 2019, the XIV European Symposium on Childhood Cochlear Implantation (ESPCI) was held in Bucharest with the participation of the leading otosurgeon of FSBU NKSO FMBA of Russia, Prof. Hassan Diab ( moderator of the sections "Cochlear implantation and otitis" and " Malformation of temporal bone"). Hassan Diab shared with his foreign colleagues the experience of choosing surgical tacticts of specialists of our Center for CI in children with abnormalities of internal ear development.