CD68 and lung disorder: In several cases, severe injury to the gastrointestinal tract (Fig. 9, cases 1, 4, and 24) and disorders of the lungs (Fig. 9, cases 2, 5, and 14) displayed the highest levels of CD68 staining, although there were no statistically significant differences between the normal samples with the exception of case 17 vs. case 1 (p = 0.0368).