The most enriched CD-associated pathways include pathways in cancer (hsa05200), cytokine-cytokine receptor interaction (hsa04060), MAPK signaling pathway (hsa04010), focal adhesion (hsa04510), apoptosis (hsa04210), Toll-like receptor pathway (hsa04620), neurotrophin signaling pathway (hsa04722), and Jak-STAT signaling pathway (hsa04630). The gene discussed is BDNF; the disease is cancer.