Most people with TBI who die do so within minutes of the injury, due to complications such as pneumothorax and insufficient airway and to other injuries that occurred at the same time.[5] Most late deaths that occur in TBI are attributed to sepsis or multiple organ dysfunction syndrome (MODS).[2] If the condition is not recognized and treated early, serious complications are more likely to occur; for example,[29] pneumonia and bronchiectasis may occur as late complications.[3] Years can pass before the condition is recognized.[17][29] Some TBI are so small that they do not have significant clinical manifestations; they may never be noticed or diagnosed and may heal without intervention.[29]