Correct!
4. 1 and 3

Both the head CT scan and the CT angiogram were interpreted as normal. The narrowing of the left common carotid artery seen in the composite view (Figure 2C) is an artifact and not confirmed in the other view of the left common (Figure 2B).

Which of the following are considerations in the differential diagnosis? (click on the correct answer to be directed to the sixth of eight pages)

1. Disseminated intravascular coagulation (DIC)
2. Immune thrombocytopenia (ITP)
3. Thrombotic thrombocytopenic purpura (TTP)
4. 1 and 3
5. All of the above

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