Subdural Hematoma
Understanding Subdural Hematoma found on Brain Computed Tomography imaging. Learn what this finding means and what steps to take next.
Radiographic Appearance
Computed Tomography FindingCrescent-shaped extra-axial hyperdensity crossing suture lines; may become isodense/hypodense over time.
Clinical Significance
Common after head trauma; mass effect can require urgent surgical evacuation.
What is a Subdural Hematoma?
Venous bleeding between dura and arachnoid, often from bridging vein injury. CT rapidly confirms size and shift.
Imaging Appearance
- Crescent hyperdensity along convexity or falx
- Crosses sutures but not dural reflections
- Acute: hyperdense; subacute: isodense; chronic: hypodense
- Look for midline shift, effaced sulci
Clinical Significance
- Acute SDH may need craniotomy
- Chronic SDH often treated with burr-hole drainage
Symptoms
- Headache, confusion, focal deficits, gait instability
Diagnosis
- Non-contrast head CT
- Labs: renal/electrolytes for perioperative planning
Treatment
- Neurosurgical evaluation
- Reversal of anticoagulation if applicable
- Close neuro checks; repeat imaging if change
Prognosis
- Good if treated before herniation; chronic SDH has high recurrence risk
What Should You Do?
- Seek emergency evaluation after head trauma with symptoms.
- Follow neurosurgical plan and avoid re-injury.
- Report worsening headache or weakness immediately.
Medical Disclaimer: Educational only; follow neurosurgical advice.
Correlate with Lab Results
Doctors often check these blood tests when Subdural Hematoma is found on imaging:
Related Imaging Terms
Have a Computed Tomography Report?
Upload your imaging report PDF and get instant, easy-to-understand explanations for terms like "Subdural Hematoma". WellAlly helps you understand your radiology results.