Functional Cognitive Disorder: Diagnostic Challenges, Clinical Features, and Future Directions in a Misunderstood Condition

Functional Cognitive Disorder (FCD) is emerging as a critical focus in neuropsychiatric research and clinical practice, reflecting the growing recognition of functional syndromes that intersect with cognitive health. Despite its prevalence, FCD remains poorly understood and frequently misdiagnosed, leading to significant patient burden and clinical uncertainty. Background/Objectives: FCD is characterized by prominent subjective cognitive complaints without underlying neurodegenerative pathology. It is commonly encountered in memory clinics yet is often misclassified as mild cognitive impairment (MCI), dementia, or pseudodementia. This review synthesizes current literature to clarify the diagnostic profile of FCD, explore its psychological mechanisms, and assess long-term outcomes. Methods: We reviewed recent longitudinal studies, meta-analyses, and clinical guidelines to identify positive diagnostic features of FCD and delineate its boundaries relative to other cognitive disorders. Special attention was given to clinical presentation, psychological correlates, and evolving diagnostic frameworks. Results: Core features of FCD include inconsistencies in cognitive performance, intact interpersonal functioning, and characteristic help-seeking behaviors (e.g., attending appointments independently, providing detailed symptom notes). Contributing psychological factors such as impaired metacognition, memory perfectionism, and anxiety are frequently observed. Longitudinal data support a non-progressive course, with no evidence of conversion to dementia when FCD is properly diagnosed. Conclusions: FCD is a distinct clinical entity with a recognizable profile and benign prognosis. Increased clinical awareness and structured diagnostic approaches are essential for accurate identification, reducing patient distress, and avoiding unnecessary interventions. Future research should focus on standardizing diagnostic criteria and developing targeted treatment strategies.