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Cysts, Congenital, Computer Applications-3D, MR, CT, Head and neck
A. Lo Casto, G. Papia, P. Purpura, F. Di Naro, D. Aiello, G. La Tona, S. Salerno; Palermo/IT
5/7 lesions were thyrohyoid,
1/7 was suprahyoid,
1/7 was lingual.
4/7 lesions were median-paramedian located on the right,
2/7 on the left,
1/7 on the midline in the preepiglottic.
1/7 lesion was a rare variant of branched thyro glossal duct cyst.
On CT TDC had a liquid density content with a thin wall enhancing after contrast medium injection.
On MRI the TDC content intensity was variable,
generally intermediate or low on T1,
and high on T2,
but in 1/7 lesion the intensity was intermediate - high on T1 and high on T2 with intensity decrease in the peripheral part of the cyst,
because of hemorrhage.
The wall showed low intensity on T1 and T2,
enhancing after gadolinium injection.
3D T1 and T2 sequences allow to depict the branching detour in 1/7 of the TDC showing the multiple components of the cyst.