Comparison of different terminologies used for cytologic reporting
Papanicolaou
class system		 World Health
Organization		 CIN Bethesta System
Class I     Within normal limits
Class II      
      Benign cellular changes
ASC
Class III Mild dyplasia
Moderate dysplasia
Severe dysplasia		 CIN1
CIN2		 Low-grade SIL
　   CIN3 High-grade SIL
Class IV Carcinoma in situ CIN3  
Class V Microinvasive cartinoma
Invasive carcinoma		 invasive
carcinoma		 Invasive carcinoma

Abbreviations: CIN,Cervical intraepiteial neoplasia;ASC,Atypical sqamous cells;
SIL,Squqmous intraepithelial lesions
From Papanicolaou(1954),Ritton et al.(1973),Richart(1968,1973),Solomin et al.(2002)

IARC Handbooks of Cancer Prevention(2005)

 

 

 

 

　

 

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