A Complication of Heroin Abuse

Question 1:

This CT scan with contrast of the abdomen was obtained from a 75-year-old woman who was an active intravenous heroin abuser. She had fever, nausea, and lower abdominal pain that worsened with walking.

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Question 2:

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Question 3:

A 23-year-old Asian man was weak and unable to stand or move his legs. He recalls a similar episode a few months ago but did not seek medical attention because the symptoms resolved. ECG showed normal sinus rhythm with first-degree A-V block at 81 beats/min; U waves were present. Laboratory tests included potassium, <1.5 mEq/L; alkaline phosphatase, 170 IU/L; TSH, 0.01 μIU/mL; free T3, 16.3 pg/mL; free T4, 4.7 ng/dL.

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Question 4:

For patients with a solid and hypoechoic thyroid nodule larger than 1 cm in diameter, a biopsy should be obtained.

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Question 5:

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ANSWER KEY:

Question 1. A

Question 2. B

Question 3. A

Question 4. D

Question 5. E