Atresia of the pinna and external canal

Atresia of the pinna and external canal

Description : Absence or partial maldevelopment of the pinna is frequently associated with abnormalities of the external auditory canal and underlying middle ear; the inner ear in these patients is usually normal.

In this patient, the inferior half of the conchal bowl is not fully developed, giving the ear a feline appearance.

The small pit seen in the concha ended blindly a short distance medially.

This failure in the development of the external auditory meatus was associated with a deformity of the middle ear and ossicles.

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