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Cerebral edema is a significant complication that can occur following an ischemic stroke and it is important for medical professionals to understand its prevalence among patients. Research indicates that cerebral edema occurs in approximately 10% to 20% of patients who experience an ischemic stroke. This condition results from the accumulation of fluid in the brain tissue, which can lead to increased intracranial pressure and further neurological impairments.

By recognizing that this prevalence estimate falls within the range of 10% to 20%, it helps healthcare providers anticipate and monitor for potential complications that may arise after a stroke. Proper assessment and timely intervention for cerebral edema can be crucial in improving patient outcomes and minimizing the effects of the stroke.

The other ranges provided are either higher or broader than the medically accepted estimates, making them less consistent with current literature and clinical guidelines regarding the incidence of cerebral edema in ischemic stroke cases.