Table 1.
Tissue Samples, All From Human Immunodeficiency Virus-positive Men, Used in the Cross-sectional Series, Including Anatomic Location
| Histological Category | Total No. of Samples | Median Age, years | Anatomic Location, No. of Samples | ||
|---|---|---|---|---|---|
| Anal Canal | Perianal | Not Provided | |||
| Normal | 106 | 53 | 105 | 1 | 0 |
| AIN1 | 37 | 47 | 27 | 10 | 0 |
| AIN2 | 98 | 48 | 91 | 7 | 0 |
| AIN3 | 74 | 48 | 64 | 10 | 0 |
| SCC | 30 | 52 | 4 | 11 | 15 |
| Total | 345 | 50 | 291 | 39 | 15 |
Abbreviations: AIN1–AIN3, anal intraepithelial neoplasia (grades 1–3); Normal, normal control samples; SCC, anal squamous cell carcinoma.