External auditory canal atresia

Aural atresia is predominantly unilateral, with bilateral involvement being rare. It can be classified into two types: congenital aural atresia and acquired aural atresia (secondary aural atresia). Congenital aural atresia: Caused by developmental abnormalities of the first branchial groove, often accompanied by congenital auricle deformities and middle ear malformations. Acquired aural atresia: Aural atresia that develops after birth due to various factors, such as burns, inflammation, tumors, trauma, foreign bodies, and surgical injuries of the external auditory canal. Congenital aural atresia can be identified at birth by the presence of microtia and the absence of an external auditory canal. Acquired aural atresia often presents with a sensation of ear blockage and hearing loss. If complicated by infection or suppurative otitis media, symptoms such as ear pain or ear discharge may occur.