[Clinico-cytologic aspects of the diagnosis of medullary cancer of the thyroid].

Clinical diagnosis of medullary carcinoma was analysed in 89 patients (6.6% of patients with various thyroid malignancies). Diarrhea as a peculiar clinical symptom was observed in 16% only. In 7%, tumor was detected during screening although patients did not make any complaints. Histological pattern of tumor was identified before treatment in 50 cases as a result of diagnostic puncture application. This procedure is an important diagnostic test for identification of medullary carcinoma of the thyroid.