Clinical Reasoning: A 48-Year-Old Woman With 6 Months of Vivid Visual Hallucinations.

Visual hallucinations are frequently encountered in clinical practice. It is critical for neurologists, particularly those in training, to develop a systematic approach for evaluating patients presenting with such unique and often perplexing symptoms. In this study, we present the case of a 48-year-old woman who developed vivid visual hallucinations after receiving nivolumab for melanoma. We discuss the broad differential diagnosis for visual hallucinations and how history and examination can guide one's evaluation.