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. 2021 Oct;12(5):2423–2437. doi: 10.21037/jgo-20-610

Table 1. Patient demographics.

Parameter Number
Total cases (n) 311
Age (years)
   Median age 61
   Interquartile range 31–89
Gender, n (%)
   Female 225 (72.3)
   Male 86 (27.7)
Location of primary tumor, n (%)
   Anus 117 (56.9)
   Anal canal 92 (29.6)
   Anorectum 16 (5.1)
   Overlapping lesion of rectum, anus, anal canal 10 (3.2)
   Rectum 7 (2.3)
   Anorectal junction 6 (1.9)
   Skin of anus 1 (0.3)
   Perianal skin 1 (0.3)
   Cloacagenic zone 1 (0.3)
Specimen site, n (%)
   Local 210 (67.5)
   Distant metastasis 101 (32.5)