TNF and Oral leukoplakia: The descriptive statistics of levels of salivary TNF-α in three groups with OSCC group showing - median: 43.75; range: 16.5- 253, leukoplakia - median: 21.825; range: 7.8 – 91.5 and control group - median: 4.65; range: 2.15 – 21.6 (Table 2).