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Steroid dementia syndrome describes the signs and symptoms of hippocampal and prefrontal cortical dysfunction, such as deficits in memory, attention, and executive function, induced by glucocorticoids. Dementia-like symptoms have been found in some individuals who have been exposed to glucocorticoid medication, often dispensed in the form of asthma, arthritis, and anti-inflammatory steroid medications. The condition reverses, but not always completely, within months after steroid treatment is stopped.
The term "steroid dementia" was coined by Varney et al. in reference to the effects of long-term glucocorticoid use in 1,500 patients. While the condition generally falls under the classification of Cushing's syndrome, the term "steroid dementia syndrome" is particularly useful because it recognizes both the cause of the syndrome and the specific effects of glucocorticoids on cognitive function. Further, the more precise terminology clearly distinguishes the condition from full-blown Cushing's syndrome, which is extremely broad regarding the causes and the multitude of symptoms , and from hypercortisolemia, which identifies neither the source nor the symptoms of excess circulatory cortisol.