TABLE 1.

Presentation of available case reports

Author	Patient	Clinical features	Symptoms onset day^*	CSF	Lab tests	History	Brain CT/MRI	Treatment
Yüksel et al ⁹	14 yr F	Bilateral shoulder shrugging, choreiform movements in all four limbs and bilateral milkmaid's grip sign	3	NA	Iron deficiency anemia	Sydenham's chorea	Normal	Carbamazepine
Sawczyńska et al ⁵	77 yr F	Orofacial dyskinesia and involuntary chorea‐type movements of the trunk and all limbs	11	Normal	Elevated serum inflammation markers dyselectrolytemia	Arterial hypertension, diabetes mellitus, hypothyroidism, and urinary incontinence and three malignancies in remission	Marked features of cerebral small vessel disease. Diffuse white matter hyper intensities, cortical and subcortical atrophy	Steroids diazepam remdesivir, IVIG
Cotta Ramusino et al ⁶	62 yr M	Choreiform movements in all four limbs, head, and trunk. Mild encephalopathy (impulsivity, hyperactivity, and attention impairment)	Before	Mildly decreased glucose mildly increased albumin	Normal	Type 2 diabetes mellitus and arterial hypertension	SWI showed hypointense signal in the dorsolateral portion of both putamina	Tetrabenazine, haloperidol
Byrnes et al ⁷	36 yr M	Intermittent rapid, irregular, and no purposeful movements of the both upper extremities with mild encephalopathy	Before	Mildly elevated lymphocytes	Decreased lymphocytes, mildly increased ESR, CRP.	Drug abuser	Enchantment lesions affecting the bilateral medial putamen and left cerebellum.	Solu‐Medrol, IVIG, methylprednisolone
Ghosh et al ⁸	60 yr M	Right‐sided involuntary violent flinging movements in all limbs with semi‐purposeful dancing movement involving both right upper and lower limbs.	2	NA	Capillary blood glucose 540, mild neutrophilic leukocytosis, lymphopenia increased ESR CRP, metabolic acidosis, and ketonuria	None	Left striatal hyperintensity on T1‐weighted imaging	Insulin
Revert Barberà et al ¹¹	69 yr F	Mixed aphasia, mild right hemiparesis, and choreic movements in all 4 limbs. Headache, focal neurological deficits, seizures, and diffuse encephalopathy.	Before	NA	Elevated d‐dimer levels (3160 μg/L),	Fatty liver, fibromyalgia	Capsuloganglionic and thalamic infarcts bilaterally, with thrombosis of the lateral veins, left lateral sinus, straight sinus, and vein of Galen
Salari et al ¹²	13 yr M	Large‐amplitude choreic movements affecting the right side of his body that affected his gait	7 after vaccination	0 RBC, 0 WBC, protein 51 (g/L), glucose 56 (mg/dL)	Normal	None	Multiple white matter lesions, one of them enhanced with gadolinium	Intravenous methylprednisolone and tetrabenazine
Salari et al ¹²	18 yr M	Choreic movements that mainly affected the left upper limb, shoulder, and the left lower limb.	7 after vaccination	3 RBC, 4 WBC, protein 34 (g/L), glucose 64 (mg/dL)	Normal	None	Few nonspecific white matter lesions	Intravenous methylprednisolone and tetrabenazine
This paper case 1	67 yr F	Random, fast, irregular, and involuntary choreiform movements in her face and all four limbs, with right arm dominancy.	180	NA	Normal	None	Damaged bilateral basal ganglia	Tetrabenazine
This paper case 2	62 yr F	Choreiform movements on all limbs, especially on the right side	15	NA	Increased ESR, CRP	None	Normal	Tetrabenazine

Day of choreiform movement onset since COVID‐19 first symptoms; CSF, cerebrospinal fluid; NA, no data available; IVIG, intravenous infusion of immunoglobulins; CT, computed tomography; MRI, magnetic resonance imaging.