Which statement best differentiates an epidural hematoma from an intracerebral hemorrhage on imaging and in typical clinical context?

Which statement best differentiates an epidural hematoma from an intracerebral hemorrhage on imaging and in typical clinical context?

• A. Epidural hematoma is intraparenchymal, lens-shaped on CT, often associated with skull fracture.
• B. Intracerebral hemorrhage is extradural and crescent-shaped on CT.
• C. Epidural hematoma is extradural, lens-shaped on CT, often associated with skull fracture and lucid interval; intracerebral hemorrhage is intraparenchymal, often due to hypertensive bleed, with progressive symptoms; CT shows intraparenchymal bleed.
• D. Both are the same on CT.

Answer: (C)

The key idea is where and how the bleed sits, which shows up on imaging and matches the clinical story. An epidural hematoma is located between the skull and the dura (extradural) and usually appears as a lens-shaped (biconvex) collection on CT. The classic clinical context is a skull fracture, often of the temporal bone, with a lucid interval where the patient temporarily remains awake after the injury before rapid deterioration as the hematoma expands. An intracerebral hemorrhage, by contrast, is within the brain tissue itself (intraparenchymal). On CT it presents as a hyperdense area inside the brain parenchyma, not a well-defined lens that sits at the skull border. Hypertensive bleeds are a common cause, and symptoms typically progress due to swelling and rising intracranial pressure rather than a lucid interval. So the description that the hematoma is extradural, lens-shaped on CT, often linked to skull fracture and lucid interval, and that intracerebral hemorrhage is intraparenchymal with progressive symptoms and CT showing a bleed within brain tissue best differentiates the two.

The key idea is where and how the bleed sits, which shows up on imaging and matches the clinical story. An epidural hematoma is located between the skull and the dura (extradural) and usually appears as a lens-shaped (biconvex) collection on CT. The classic clinical context is a skull fracture, often of the temporal bone, with a lucid interval where the patient temporarily remains awake after the injury before rapid deterioration as the hematoma expands.

An intracerebral hemorrhage, by contrast, is within the brain tissue itself (intraparenchymal). On CT it presents as a hyperdense area inside the brain parenchyma, not a well-defined lens that sits at the skull border. Hypertensive bleeds are a common cause, and symptoms typically progress due to swelling and rising intracranial pressure rather than a lucid interval.

So the description that the hematoma is extradural, lens-shaped on CT, often linked to skull fracture and lucid interval, and that intracerebral hemorrhage is intraparenchymal with progressive symptoms and CT showing a bleed within brain tissue best differentiates the two.