Leaes CGS et al. - In an unusual case of thyroid follicular adenoma associated with marked increase in carbohydrate antigen (CA) 19-9 level, it seems that malignant thyroid disease has been associated with high CA 19-9 levels in several studies Methods
Elevated CA 19-9 levels are frequently associated with occult neoplasm
High CA 19-9 values trigger a search for underlying malignancy
Results
An unusual case of thyroid follicular adenoma associated with marked increase in CA 19-9 level with confirmed immunocytochemical positivity for CA 19-9 is presented
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