Cerebral infarction is a very rare complication of diabetic ketoacidosis (DKA) which is a
metabolic disorder caused by insulin deficiency. A previously healthy 6-year-old boy with a
newly diagnosed Type 1 diabetes mellitus presented with a severe DKA. The patient, who
tested positive for SARS-CoC-2 nasopharyngeal PCR, developed about 72 hours after
admission a Parinaud’s syndrome (PS), also known as dorsal midbrain syndrome, which is
described as an up-gaze saccadic paresis, a convergence-retraction nystagmus, a light-near
dissociation of the pupils and occasionally a lid retraction. The brain magnetic resonance
imaging revealed an ischemic infarction in the left thalamus and the thalamo-mesencephalic
junction with a slight extension in the midbrain tegmentum. His symptoms improved
gradually and at 3-weeks follow-up he had a full neuro-ophthalmological recovery.
By describing a Parinaud syndrome as a neuro-ophthalmologic complication in
diabetic ketoacidosis (DKA) crisis, which, to our best knowledge, has not been described yet,
our case expands the knowledge of the neurological manifestations occurring in
children during diabetic ketoacidosis and reiterates the importance to keep those patients
under strict neurological monitoring for at least 72 hours, especially in severe DKA and to
request early brain imaging for any child with neurological deterioration.