PMC5358933_01
(A) Non-contrast axial CT (WW 350, WL 60) showing a hyper-dense foreign body in the right masticator space (arrow). (B) Axial and (C) coronal reformatted CT images (WW 1500, WL 300) showing a fracture of the right lateral pterygoid plate (vertical arrow). The fractured bony fragment is displaced laterally (horizontal arrow).
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The CT revealed a hyperdense structure in the right masticator space extending from the level of the mandibular angle to the level of pterygoid fossa superiorly (Figure 1). The right lateral pterygoid plate was found to be fractured and displaced laterally (Figure 1B, 1C, 2A).
(A) Contrast-enhanced coronal reformatted CT image (WW 350, WL 60) showing a fracture (vertical arrow) and lateral displacement (horizontal arrow) of the right lateral pterygoid plate. A hyper-dense foreign body (white arrow) is also seen in the pterygoid fossa. An enlarged, peripherally enhancing lymph node is also seen in the right submadibular region (double arrow). (B) Contrast-enhanced sagittal reformatted CT image (WW 350, WL 60) showing a hyperdense foreign body (black arrow) containing foci of air (white arrow).
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The average CT attenuation value of the structure was 88 H.U. and it contained foci of air (arrow in Figure 2B). The right lateral pterygoid plate was found to be fractured and displaced laterally (Figure 1B, 1C, 2A). Multiple enlarged lymph nodes were seen in the right submandibular region measuring up to 20 mm in diameter (Figure 2A).
Photograph of the removed foreign body.
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A hard twig was pulled out, measuring approximately 42 mm in length and 10 mm in thickness (Figure 3).