In our previous study, we detected positive expression of v-erb-b2 erythroblastic leukemia viral oncogene homolog-2 (ERBB2), baculoviral IAP repeat containing-5 (BIRC5) and the glycoprotein CD99 in most glioblastoma tissues, and negative expression in normal brain tissues [17]. The gene discussed is CD99; the disease is glioblastoma.