The cloudy, dark, and sunny aspects of a dangerous and uncertain entity: Moderate traumatic brain injury

Moderate traumatic brain injury (TBI) is a prevalent entity with a wide, dynamic, and heterogeneous injury spectrum. It has its own characteristics. However, it does not receive enough attention, as evidenced by the scarce representation in the literature and the absence of specific guidelines. Its changing epidemiological profile allows us to predict an increase in its incidence in the future, especially in the fragile population. Moderate TBI is not adequately categorized, and the risk of neuroworsening is elevated. The mortality of moderate TBI is not negligible and its functional outcomes are poor. Non-invasive neuromonitoring tools may have a key role in the initial evaluation and categorization of moderate TBI. Moderate TBI has cloudy, dark, and sunny aspects. To analyze these aspects and to propose management strategies constitute the main objective of this narrative review.