Question

A 40-year-old female patient complains of a persistent headache. A CT scan of the head was performed, as shown below. What is the most accurate diagnosis? 

• A. Subarachnoid hemorrhage (SAH)
• B. Epidural hemorrhage
• C. Subdural hemorrhage
• D. Intraparenchymal hemorrhage

Hint:

In a patient with sudden severe headache, a subarachnoid hemorrhage (SAH) should be suspected, especially if blood is seen in the subarachnoid space on a CT scan.

Answer 1

The Correct Option is A

A 40-year-old female patient's CT scan shows visible signs of bleeding in the subarachnoid space, which indicate subarachnoid hemorrhage (SAH). Here is a step-by-step analysis for identifying and confirming the diagnosis:

1. Review of Symptoms: The patient reports a persistent headache. A sudden onset severe headache, often described as the "worst headache of my life," is characteristic of SAH.
2. CT Scan Analysis: On the non-contrast CT scan of the head, look for hyperdense areas indicating blood accumulation. In SAH, this typically appears in the basal cisterns, Sylvian fissures, and interhemispheric fissures.
3. Diagnosis Correlation: Compare the CT findings with common patterns seen in other hemorrhages:
   • Subarachnoid hemorrhage: bleeding in the subarachnoid space.
   • Epidural hemorrhage: biconvex (lens-shaped) hyperdensity often seen with skull fracture.
   • Subdural hemorrhage: crescent-shaped hyperdensity that might extend across suture lines.
   • Intraparenchymal hemorrhage: bleeding in the brain parenchyma itself.
4. Final Verification: The CT scan's hyperdense appearance in the subarachnoid region, along with the clinical presentation of a severe headache, confirms subarachnoid hemorrhage as the most accurate diagnosis.

The answer is Subarachnoid hemorrhage (SAH). Immediate neuroimaging and expert consultation are crucial for appropriate management and treatment of SAH.