However, psychotic symptoms (e.g., delusions or hallucinations) may develop in cancer patients with no pre-existing psychotic disorder, secondary to CTx agents such as chlorambucil, hydroxyurea, ifosfamide, asparaginase, corticosteroids, interferon-alpha, interleukin-2, and procarbazine [16, 17]. Here, IL2 is linked to psychotic disorder.