Cerebellar cognitive affective syndrome after acute cerebellar stroke

IntroductionThe cerebellum modulates both motor and cognitive behaviors, and a cerebellar cognitive affective syndrome (CCAS) was described after a cerebellar stroke in 1998. Yet, a CCAS is seldom sought for, due to a lack of practical screening scales. Therefore, we aimed at assessing both the prevalence of CCAS after cerebellar acute vascular lesion and the yield of the CCAS-Scale (CCAS-S) in an acute stroke setting. Materials and methodsAll patients admitted between January 2020 and January 2022 with acute onset of a cerebellar ischemic or haemorrhagic first stroke at the CUB-Hopital Erasme and who could be evaluated by the CCAS-S within a week of symptom onset were included. ResultsCerebellar acute vascular lesion occurred in 25/1,580 patients. All patients could complete the CCAS-S. A definite CCAS was evidenced in 21/25 patients. Patients failed 5.2 +/- 2.12 items out of 8 and had a mean raw score of 68.2 +/- 21.3 (normal values 82-120). Most failed items of the CCAS-S were related to verbal fluency, attention, and working memory. ConclusionA definite CCAS is present in almost all patients with acute cerebellar vascular lesions. CCAS is efficiently assessed by CCAS-S at bedside tests in acute stroke settings. The magnitude of CCAS likely reflects a cerebello-cortical diaschisis.