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[Correspondence] Stroke in ICD-11: the end of a long exile

In 1955, cerebrovascular diseases were reclassified as circulatory system diseases in the 7th edition of the International Classification of Diseases and Related Health Problems (ICD). WHO’s idea then was that stroke is a condition affecting blood vessels. This decision to reclassify cerebrovascular diseases seemed contrary to the pathophysiology and symptoms leading to mortality and morbidity, which are those of brain dysfunction. Moreover, the decision deviated from the principle of ischaemia of other organs (such as the intestines, kidneys, and the eye), which were listed under their respective organs in ICD-7.