Multimodal Imaging Reveals Labbé Vein Thrombosis Mimicking Subdural Hematoma: A Diagnostic Pitfall in Emergency Neuroimaging.

Labbé vein thrombosis is a rare cause of cerebral venous thrombosis that may mimic more common intracranial hemorrhagic pathologies, such as acute subdural hematoma or cortical hemorrhage, on initial CT. This case involves a 20-year-old male who presented with an acute right temporal headache and a hyperdense subcortical lesion on CT. The thrombus measured approximately 65 HU. MRI revealed a T1 hyperintense thrombus in the vein of Labbé, and digital subtraction angiography confirmed venous occlusion. The patient was treated with anticoagulation and recovered without neurological deficit. This case highlights a diagnostic pitfall in emergency neuroimaging and emphasizes the value of multimodal imaging for accurate diagnosis.