Unilateral Submandibular Gland Aplasia Associated with Ipsilateral Sublingual Gland Hypertrophy
A. Srinivasana,
J.S. Moyerb and
S.K. Mukherjia
a Department of Radiology, Division of Neuroradiology, University of Michigan Health System, Ann Arbor, Mich
b Department of Otorhinolaryngology, University of Michigan Health System, Ann Arbor, Mich
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Fig 1. A, Coronal noncontrast maxillofacial CT image reveals absence of the right submandibular gland (broad arrows). The contralateral submandibular gland is visualized in the left submandibular space (double arrows).
B, Coronal noncontrast maxillofacial CT image shows a well-defined low-attenuation mass (broad arrows) in the right sublingual space located lateral to the genioglossus-geniohyoid complex and bowing the mylohyoid inferiorly (dotted arrow). The normal left sublingual gland is visualized in its expected location (thin arrows).
C, Axial contrast-enhanced CT image demonstrates a low-attenuation mildly enhancing mass in the right sublingual region (broad arrows). The contralateral submandibular gland (double arrows) shows attenuation characteristics similar to those of the mass. The normal left sublingual space is also demonstrated (thin arrows).
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Fig 2. The right sublingual mass (long arrows) reveals similar signal intensity similar to that of the contralateral submandibular gland (short arrows) on axial spin-echo nonenhanced T1-weighted (A) and fat-saturated T2-weighted (B) images. Dynamic contrast-enhanced fat-saturated gradient-echo images (C and D) reveal the enhancement pattern of the mass (long arrows) to be similar to that of the left submandibular gland (short arrows).
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