摘要: Abstract Although the term “thyroiditis” suggests inflammation, many disorders of thyroid that are unknown etiology also currently included under this heading. Thus, only infective thyroiditis and subacute clearly inflammatory; autoimmune is a result lymphocytic fibroblastic infiltration secondary to immune processes, Riedel's struma (a rare disorder) results from curious form proliferation nature. The pathology particular organism. picture unique type follicular disruption with histiocytes surrounding extravasated colloid masses, producing appearance giant cells. Autoimmune characterized by infiltration, lymphoid follicles, Askanazy cells, fibrosis, each variable degree, atrophy follicles. in transcends capsule involves adjacent tissues. electron microscopic briefly described.