title: Congenital absence of the oval window.
mesh_terms: D000293:Adolescent; D000328:Adult; D001309:Auditory Threshold; D002648:Child; D002675:Child, Preschool; D004432:Ear, Middle / Q000002:abnormalities*; D005154:Facial Nerve / Q000002:abnormalities; D005260:Female; D006311:Hearing Disorders / Q000151:congenital* / Q000601:surgery; D006801:Humans; D007188:Incus / Q000002:abnormalities; D008297:Male; D019736:Prostheses and Implants; D013199:Stapes / Q000002:abnormalities; D014433:Tympanoplasty / Q000379:methods