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Table 2 Pathologic characteristics of anal tumors from 27 patients diagnosed with anal cancer

From: Prevalence of human papillomavirus infection in squamous cell carcinoma of the anal canal in a Northeast City in Brazil: viral genotyping and clinical aspects

Predominant morphology
 Ulceration 04 14.81
 Vegetating 02 7.41
 Ulceration and vegetating 06 22.22
 Stenosing 01 3.7
 Non evaluated 14 51.85
Size of the lesion (cm)
  ≤ 0,5 01 3.7
 0.6–2.0 08 29.63
 2.1–5.0 15 55.56
  ≥ 5.1 03 11.11
UJCC/TNM Staging
 I 02 7.41
 II 02 7.41
 III 09 33.33
 IV 0 0
 Non evaluated 14 51.85
Tumor Grade
 Well Differentiated 06 22.22
 Moderately Differentiated 19 70.38
 Poorly Differentiated 01 3.7
 Undifferentiated 01 3.7
Invasion
 Present 09 33.33
 Absent 12 44.45
 Not evaluated 06 22.22
Infiltration
 Anal canal wall 01 3.7
 Perianal region 01 3.7
 Perirectal fat 01 3.7
 Vagina and uterine cervix 01 3.7
 Stroma 01 3.7
 Muscle layer 01 3.7
 Perineural 01 3.7
 Vulvar 01 3.7
 Not evaluated 01 3.7
 No infiltration 18 66.7
Lymph node involvement
 Yes 07 25.93
 No 15 55.55
 Not evaluated 05 18.52
Metastasis
 Yes 03 11.11
 No 19 70.37
 Not evaluated 05 18.52
Inflammatory process
 Yes 05 18.52
 No 12 44.44
 Not evaluated 10 37.04
Necrosis Presence
 Yes 02 7.41
 No 12 44.44
 Not evaluated 13 48.15