Internal Cerebral Vein Thrombosis Mimicking Thalamic Neoplasm in a Child with Down Syndrome

A 2-year-old boy with Down syndrome presented with altered mental status, seizures, and vomiting; imaging initially suggested a thalamic tumor but was confirmed to be an infarct secondary to internal cerebral vein thrombosis. The case highlights the increased coagulopathy risk in Down syndrome and the importance of CT venography in diagnostic workup.