[Cytologic aspiration biopsy in the diagnosis and therapy of solitary cystic nodular thyropathies].

Between January and December 1983, 36 patients with single and benign cystic thyroid nodules underwent fine needle aspiration. They received, after fine needle aspiration, medical treatment (antiinflammatory drugs and L-T4). Clinical and ultrasonographic follow-up was performed either 6 and 18 months after FNA, to evaluate the lesion evolution. The six-month follow-up demonstrated no ultrasonographic signs of cystic lesion in 11 cases (30.6%); a decreased volume in 21 (58.3%) and four recurrences (11.1%), which underwent surgical treatment (lobectomy). In 21 patients with persistent lesions at 18 month follow-up, a cystic reduction in a 79.9% rate was documented. These data suggests the diagnostic importance of FNA and the safety of this method not only to surgical selection of patients, but also to the treatment of benign thyroid cysts.