A 22-year-old man has a GCS of 6 after a road traffic accident. CT shows a crescent-shaped hyperdense collection over the left cerebral convexity with midline shift. What is the most likely source of bleeding?

• A Middle meningeal artery
• B Dural venous sinuses
• C Cortical arteries
• D Bridging veins ✓

Explanation

A crescent-shaped hyperdense collection is characteristic of an acute subdural hematoma, which classically results from tearing of the bridging veins. The middle meningeal artery is the source of epidural hematomas, which appear biconvex or lens-shaped. Cortical arteries and dural sinuses are less common sources.

Reference: Robbins and Cotran Pathologic Basis of Disease, 10th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.