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FIG 3. 32-year-old man with a recurrent episode of left-sided neck infection.
A, CT scan shows diffuse swelling and enhancement of the soft-tissue plane (arrows) around the left pyriform fossa.
B, Axial contrast-enhanced CT scan shows an abscess in the perithyroid tissue (arrows). Note the focus of air density in the perithyroid abscess (arrowhead).
C, Hypopharyngoscopic study reveals a sinus opening at the pyriform sinus apex (arrow) with a view from above and anterior toward the bottom. R indicates right; L, left; A, anterior; P, posterior.
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