Figure 3: Graph (box plots) shows mean ADCs of the nasopharyngeal wall of early stage NPC, NPL, NP-TB, and NPI. The horizontal line is a median (50th percentile) of the measured ADC values, the top and bottom of the box represent 25th and 75th percentiles, respectively, and whiskers indicate the range from the largest to smallest observed data points within 1.5 interquartile range presented by the box. Further LSD method multiple comparisons are display in table 2.