After 3 months of medication balloon therapy, a patient who had contrast-induced encephalopathy recovered: A case report.

Rationale: Iodinated contrast agents are extensively employed in clinical settings, with allergic reactions and renal impairment being the most prevalent adverse events. Contrast-induced encephalopathy (CIE) can present with heterogeneous clinical features, making diagnosis challenging. Prior studies on CIE have primarily documented rapid recovery within several days.