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Medline ® Abstract for Reference 17

of 'Infiltrative thyroid disease'

Riedel's thyroiditis: clinical, pathological and imaging features.
Papi G, Corrado S, Cesinaro AM, Novelli L, Smerieri A, Carapezzi C
Int J Clin Pract. 2002;56(1):65.
Riedel's thyroiditis (RT) is an extremely rare form of chronic thyroiditis, characterised by a fibroinflammatory process which partially destroys the thyroid, often involving surrounding tissues. We describe an unusual case of RT in a 38-year-old woman, and discuss its typical clinical, pathological, ultrasound, radionuclide scanning and magnetic resonance findings. We conclude that the diagnosis of RT is highly suggestive in the presence of a hard gland (or nodule), fixed to adjacent structures; 'cold' on Tc99 scan; hypoechoic with absence of vascular flow, invading the adjacent neck structures on ultrasound; hypointense in T1- and T2-weighted MR images; and showing fibrous tissue fragments with inflammatory cells at cytological examination. Thyroidectomy has to be performed to confirm the diagnosis and to relieve pressure symptoms.
Hesperia Tiroide Centre, Hesperia Hospital, Modena, Italy.