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Difficulty: EasyDiagnostic Workup and Test Sequencing

Match each classic patient presentation with the most appropriate initial diagnostic imaging study.

  • A 65-year-old man with acute, tearing chest pain radiating to the back and a blood pressure discrepancy between his arms.Computed tomography angiography of the chest
  • A 45-year-old woman with the sudden onset of the 'worst headache of her life,' photophobia, and nuchal rigidity.Noncontrast computed tomography of the head
  • A 22-year-old man with severe, sudden-onset unilateral scrotal pain and an absent cremasteric reflex.Scrotal ultrasound with Doppler
  • A 55-year-old woman with episodic right upper quadrant abdominal pain that worsens after consuming fatty meals.Right upper quadrant abdominal ultrasound

Answer

The correct pairings match the aortic dissection presentation with a CT angiography, the subarachnoid hemorrhage with a noncontrast head CT, the testicular torsion with a scrotal Doppler ultrasound, and the biliary colic with a RUQ ultrasound.
Each clinical presentation describes a classic acute condition that requires a specific, guideline-supported initial diagnostic imaging modality. Aortic dissection requires CT angiography to view the aorta; subarachnoid hemorrhage requires noncontrast head CT to spot acute blood; testicular torsion requires scrotal Doppler ultrasound to evaluate blood flow; and biliary colic requires RUQ abdominal ultrasound to visualize gallstones.

Step-by-Step Solution

1
Analyze the first presentation.
Identify suspected aortic dissection due to tearing chest pain and pulse/pressure deficits.
Requires rapid imaging to visualize an intimal flap.
2
Select imaging for suspected aortic dissection.
Match with CT angiography of the chest.
It is the standard initial diagnostic modality for stable patients.
3
Analyze the second presentation.
Identify suspected subarachnoid hemorrhage due to the thunderclap headache.
Requires immediate identification of acute blood in the subarachnoid space.
4
Select imaging for suspected subarachnoid hemorrhage.
Match with Noncontrast computed tomography of the head.
Contrast obscures acute hemorrhage; noncontrast is required.
5
Analyze the third presentation.
Identify suspected testicular torsion due to acute pain and absent cremasteric reflex.
Requires assessment of organ perfusion.
6
Select imaging for suspected testicular torsion.
Match with Scrotal ultrasound with Doppler.
Doppler flow evaluates the presence or absence of arterial perfusion.
7
Analyze the fourth presentation.
Identify suspected biliary colic due to postprandial RUQ pain.
Requires evaluation of the gallbladder and biliary tree.
8
Select imaging for suspected biliary colic.
Match with Right upper quadrant abdominal ultrasound.
It is highly sensitive for gallstones and avoids unnecessary radiation.

Key Concept

Selection of the most appropriate initial diagnostic imaging modality based on classic clinical presentations of common acute medical conditions.
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Topics

Diagnostic Workup and Test Sequencing

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