Bethesda system
（重定向自Low grade squamous intraepithelial lesion）
![LSIL. Pap stain.](/Images/godic/202501/25/Low_grade_squamous_intraepithelial_lesion5739.jpg")
![HSIL. Pap stain.](/Images/godic/202501/25/High-grade_squamous_intraepithelial_lesion5739.jpg")
![Adenocarcinoma. Pap stain.](/Images/godic/202501/25/Adenocarcinoma_on_pap_test_15739.jpg")
The Bethesda system (TBS) is a system for reporting cervical or vaginal cytologic diagnoses, used for reporting Pap smear results. It was introduced in 1988, and revised in 1991 and 2001. The name comes from the location (Bethesda, Maryland) of the conference that established the system.