PMC3997894_01
Preoperative pure-tone audiogram. A pure-tone audiogram revealed conductive hearing loss of 30 dB.
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A pure-tone audiogram revealed conductive hearing loss of 30 dB(Figure 1).
Magnetic resonance images. The tumour was detected as a 2.3 x 2.1 x 1.8 mm mass in the EAC, with low signal intensity on T1-weighted, high signal intensity on T2-weighted, and homogeneous enhancement on gadolinium-enhanced T1-weighted images. (a) Transverse section of a T1-weighted image. (b) Transverse section of a T2-weighted image. (c) Transverse section of a gadolinium-enhanced T1-weighted image. (d) Coronal section of a gadolinium-enhanced T1-weighted image.
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T1-weighted, high signal intensity on T2-weighted, and homogeneous enhancement on gadolinium-enhanced T1-weighted images (Figure 2). There was no connection with the parotid gland and no invasion of the middle ear.
Histopathological section of the tumour. Histopathological examination of haematoxylin and eosin (HE) stained sections revealed a partly encapsulated tumour exhibiting proliferation of myoepithelial cells with foci of ductal differentiation associated with myxoid and hyalinized matrix material (x40).
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