Usage: in medicine, in particular, to endocrinology for the diagnosis of hyperthyroidism. SUMMARY OF THE INVENTION: In a sample of the patient serum were grown crystals and examined their macro- and microscopically for the presence of crystallization nuclei, a butterfly-shaped and consisting of acicular crystals of black color, and when an amount of 60-250 diagnose hyperthyroidism. The method permits the diagnosis with high accuracy.
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