In 1974, the international committee of thyroid pathologists published the first WHO histological classification of thyroid tumors which had served as a basis for various clinical, pathological, and  epidemiological studies.<unk>  may also be classified according to various classification methods based on etiological, epidemiological, anatomical, pathological, functional and morphological factors.
Goiter classification
Boil classification
Polio classification
Bleeding classification
Mastitis classification
Bishop score
Child-Turcotte classification
Typhus classification