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Examination of the pinnae revealed bilateral Stahl ear deformity.
Thus, anomalies such as prominent ear, crinkled ear, Stahl ear, and lop ear are included in this category.
Several theories exist on the etiology of Stahl ear, including developmental error during the 3rd embryologic month as the helix and scaphoid fossa mature, deforming pressure in utero, abnormal prechondral growth, failed embryologic regression, and abnormal transverse intrinsic muscle orientation.
While most cases of Stahl ear occur without other congenital anomalies and without hereditary disposition, (4,7) the physician should he aware of possible concomitant craniofacial, audiologic, renal, and other multiple congenital anomalies.