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Table 1 Clinical and histological characteristics of the various study groups

From: Methylene blue as an early diagnostic marker for oral precancer and cancer

Criteria Group I Group II Group III
Premalignant lesions (n = 50) OSCC (n = 50) Controls (n = 20)
Age ≤ 40 yrs 28 56% 8 16% 12 60%
  ≥40 yrs 22 44% 42 84% 8 40%
Sex Females 2 4% 14 28% 4 20%
  Males 48 96% 36 72% 16 80%
Site Buccal Mucosa(BM) 40 leukoplakia 44 BM with vest. ridge ----
  Palate 4 smoker’s palate 2
  Tongue 2 leukoplakia 2
  Floor of mouth   2
Tobacco Use No 0 0 20
  Yes 50 50 0
Histological Diagnosis Mild 10 20% WDSCC 30 60% ---
Moderate 34 68% MDSCC 16 32%
Severe 2 4% PDSCC 2 4 %
Hyperkeratosis 4 8% No evidence of 2 4%
without dysplasia Malignancy