Template:CIN grades

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Cervical intraepithelial neoplasia edit
Histology Grade Corresponding Cytology Description Image
CIN 1 (Grade I) Low-grade squamous intraepithelial lesion (LSIL)
  • Mild epithelial dysplasia
  • Confined to the basal 1/3 of the epithelium
LSIL (CIN 1), Cervical Biopsy (3776284166).jpg
CIN 2/3 High-grade squamous intraepithelial lesion (HSIL)[notes 1]
  • Represents a mix of low and high-grade lesions not easily differentiated by histology
CIN 2 (Grade II)[notes 2]
  • Moderate dysplasia confined to the basal 2/3 of the epithelium
CIN 3 (Grade III)[notes 3]
  • Severe dysplasia with undifferentiated neoplastic cells that span more than 2/3 of the epithelium
  • May involve the full thickness
  • May also be referred to as cervical carcinoma in situ
Histopathology of CIN 3.jpg
Endocervical gland invasion is associated with high-grade lesions.[1]

Notes

  1. HSIL+ encompasses HSIL, AGC, and cancer
  2. CIN 2+ encompasses CIN 2, CIN 3, adenocarcinoma in situ (AIS), and cancer
  3. CIN 3+ encompasses CIN 3, AIS, and cancer

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References

  1. Nagi, Chandandeep S.; Schlosshauer, Peter W. (2006). "Endocervical glandular involvement is associated with high-grade SIL ". Gynecologic Oncology 102 (2): 240–243. doi:10.1016/j.ygyno.2005.12.029. ISSN 00908258.