Immunohistological analyses of the dorsal horn of the spinal cord revealed a lack of significant differences in the numbers of Iba-1+ or P-p38+ cells between the ipsilateral and contralateral dorsal horn of cancer-bearing or sham rats, as well as between the ipsilateral dorsal horns of cancer-bearing and sham rats, both at post-surgical days 6 and 8 (day 6: F1,18 = 3.57, p > 0.05; day 8: F1,18 = 5.54, p > 0.05; n = 5–6; Figure 2B,C). The gene discussed is AIF1; the disease is cancer.