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    C茅lulas C em b贸cio col贸ide

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    PURPOSE: The aim of this investigation was to quantitatively evaluate C-cells in colloid goiters, analyzing 36 thyroids that were obtained through thyroidectomy from 24 patients with goiter and 12 normal glands from adult patients without thyroid disease, which were used as the control group. MATERIAL AND METHODS: On average, 6 different thyroid areas were sampled and labeled by immunohistochemistry with a monoclonal anticalcitonin antibody, utilizing the avidin-biotin-peroxidase complex. C-cells were counted in fields measuring 1 square centimeter, and the mean number of cells per field was then calculated. Data were statistically analyzed using the Mann-Whitney test. RESULTS: In the colloid goiter group, the number of C-cells ranged from 0 to 23 per field, while in normal controls they ranged from 20 to 148 per field. CONCLUSIONS: These results demonstrate a significant decrease of C-cell number in the colloid goiter group compared with control group, indicating that the hyperplastic process is restricted to follicular cells, to the detriment of C-cells, which probably cease to receive trophic stimuli.OBJETIVO: Pesquisar, quantitativamente, as c茅lulas C em b贸cio col贸ide com o prop贸sito de investigar a rela莽茫o destas c茅lulas na patog锚nese do b贸cio. M脡TODO: Foram analisadas 35 tir贸ides obtidas de tiroidectomia, sendo 24 de pacientes com b贸cio col贸ide e 11 tir贸ides normais de adulto usadas como controle. Seis diferentes 谩reas foram amostradas em m茅dia e coradas com o anticorpo monoclonal anticalcitonina. As c茅lulas C foram contadas em campos de 1 cm虏 e o n煤mero m茅dio de c茅lulas/campo foi calculado. Os dados foram estudados estatisticamente pelo teste de Kruskal-Wallis. RESULTADOS: O n煤mero de c茅lulas C variou de 0 a 23/cm虏 em b贸cio col贸ide e em tir贸ides normais de 20 a 148/cm虏. CONCLUS脮ES: Os resultados demonstraram redu莽茫o significativa no n煤mero de c茅lulas C em b贸cio col贸ide comparando com tir贸ides normais, indicando que o processo hiperpl谩sico 茅 restrito 脿s c茅lulas foliculares em detrimento das c茅lulas C, as quais, provavelmente, deixam de receber est铆mulos tr贸ficos e se degeneram
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