PSP gets progressively worse but is not itself directly life-threatening. It does, however, predispose individuals to serious complications such as pneumonia secondary to difficulty in swallowing (dysphagia). The most common complications are choking and pneumonia, head injury, and fractures caused by falls. The most common cause of death is pneumonia. With good attention to medical and nutritional needs, it is possible for most individuals with PSP to live a decade or more after the first symptoms of the disease.
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