Table 1.
Baseline Anal Cytology and Histology in 363 Human Immunodeficiency Virus–positive Men Who Have Sex With Men at Kaiser Permanente Northern California
| Anal Histology | ||||||||
|---|---|---|---|---|---|---|---|---|
| Anal Cytology | Missing | No Biopsy | Benign | Condyloma | AIN1 | AIN2 | AIN3 | Total |
| Inadequate/Missing | 0 | 7 | 6 | 1 | 8 | 1 | 1 | 24 (6.6%) |
| NILM | 1 | 48 | 30 | 3 | 21 | 7 | 2 | 112 (30.9%) |
| ASC-US | 0 | 17 | 19 | 0 | 27 | 6 | 4 | 73 (20.1%) |
| ASC-H | 0 | 7 | 7 | 1 | 4 | 8 | 0 | 27 (7.4%) |
| LSIL | 0 | 10 | 6 | 4 | 36 | 12 | 3 | 67 (18.5%) |
| HSIL-AIN2 | 1 | 1 | 3 | 2 | 6 | 1 | 2 | 16 (4.4%) |
| HSIL-AIN3 | 0 | 6 | 1 | 1 | 15 | 11 | 10 | 44 (12.1%) |
| Total | 2 (0.6%) | 96 (26.4%) | 72 (19.8%) | 12 (3.3) | 113 (31.1%) | 46 (12.7%) | 22 (6.1%) | 363 (100.0%) |
Abbreviations: AIN1–3, anal intraepithelial neoplasia grades 1 through 3; ASC-H, atypical squamous cells that cannot exclude high-grade intraepithelial lesions; ASC-US, atypical cells of undetermined significance or more severe cytology; HIV+, human immunodeficiency virus–positive; HSIL-AIN2, high-grade squamous intraepithelial lesion with less severe abnormalities; HSIL-AIN3, high-grade squamous intraepithelial lesion with more severe abnormalities; LSIL, low-grade squamous intraepithelial lesion; NILM, negative for intraepithelial lesion or malignancy.