The task of updating the classification was given to the Classification and Nomenclature Committee of the International Society of Gynecological Pathologists and its four subcommittees. This classification reflects the present state of knowledge and modifications are almost certain to be needed as experience accumulates. Since many of the tumours and tumour-like conditions in the classification occur in several sites in the female genital tract, cross-referencing from one site to another has been done in illustrating these lesions.