Schematic drawing (A) showing the normal appearance (a) of the malleus head (mh) and incus body (ib) and the abnormal fused dysplastic malleus-incus complex,

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Presentation transcript:

Schematic drawing (A) showing the normal appearance (a) of the malleus head (mh) and incus body (ib) and the abnormal fused dysplastic malleus-incus complex, appearing as a boomerang (b) as seen on axial CT images. Schematic drawing (A) showing the normal appearance (a) of the malleus head (mh) and incus body (ib) and the abnormal fused dysplastic malleus-incus complex, appearing as a boomerang (b) as seen on axial CT images. Note the similarity to the appearance of a real boomerang (c). Axial HRCT scan (B) in patient 4 demonstrates the fused boomerang-shaped malleus head and incus body in the epitympanum (white arrow) and the attachment of the malleus-incus complex to the tympanic segment of the facial nerve canal (black arrow), rather than the stapes suprastructure. Also note the lateral attachment of the boomerang to the atretic plate. Findings were confirmed at surgery. fn indicates the location of tympanic segment of the facial nerve canal. S. Mukherjee et al. AJNR Am J Neuroradiol 2014;35:2181-2185 ©2014 by American Society of Neuroradiology