Epidemiological Study of Goiter in Man and Animals of Iraq

Abstract

Goiter occurred in Iraq . Human cases were recorded in Diwania while animal cases recorded in Mosul area . These cases were diagnosed pathologically and classified depend on gross and microscopical pathological changes .Nodullar colloid goiter , papillary thyroid cancer andmedullary thyroid carcinoma were present in patients of Diwania while hyperplastic goiter was very common in animals of Mosul .Nodullar goiter , grossly thyroid gland appeared nodullated firm or hard in pulpation . Microscopically , the nodulles have various sizes of Follicles , some of them were distended with colloid and others were small in size . The nodules were seperated by fibrous connective tissue . Papillary thyroid cancer characterized by enlargment of thyroid gland while microscopically there are many papillary projections tree like pattern ( Papilliform projections to the lumen of follicles ).The medullary cancer of thyroid , grossly tumordistrected to one lobe and there are several foci ofhaemorrhage and necrosis . Sometimes amyloidicstroma was present . The hyperplastic goiter is highly endemic in animals and human of northern of Iraq . Grossly enlargment of thyroid gland ( both lobes ) hyperemic , while microscopically hyperplastic proliferation of epithelial cells to the lumen ofollicles . The colloid was scanty and vacuolated