Cancer is perceived as a life-threatening event. For patients who have significant psychological trauma, the fear can result in dissociative experiences, avoidance of everything related to cancer, nightmares, irritability, hypervigilance, and poor conce Elderly cancer patients may have both dementia and delirium. However, the most common differential diagnostic issue when evaluating confusion in older patients involves disentangling symptoms of delirium and dementia. Therefore, differentiating between the two syndromes is essential because of therapeutic implication (Lawlor et al., 2000).