Bilateral canal atresia Overview Bilateral canal atresia (aural atresia) is the congenital absence or underdevelopment of the external ear canals in both ears. It is frequently associated with microtia and causes bilateral conductive hearing loss. Immediate aural rehabilitation is critical to ensure normal speech, language, and cognitive development Symptoms Hearing Loss: Bilateral moderate-to-severe conductive hearing loss prevents adequate sound from naturally reaching the brain. Without early intervention, it can lead to speech and language delay's. Microtia : The outer ear (pinna) is typically underdeveloped. It may be completely absent or appear small and peanut-shaped. Associated Craniofacial Anomalies : Atresia can occur as part of a genetic syndrome (e.g., Treacher Collins or Crouzon syndrome), which may involve jaw or facial nerve abnormalities'. Drainage and Infections: If the canal is partially narrowed (stenosis) rather than completely closed, it can trap debris ...