Correct!
2. Lung cancer is an unlikely consideration in a 19-year-old

There is an enlarging density in the left chest which is obscuring the left heart border. Lung cancer would be quite unlikely in a 19-year-old. The lack of clearing on the chest x-ray is not consistent with community-acquired pneumonia. Pediatric autoimmune neuropsychiatric disorders associated with streptococcal infections is the presence of obsessive compulsive and/or a tic disorder with prepubertal symptom onset in association with a streptococcal infection (1). Long term sequelae are unknown.

Which of the following are true? (Click on the correct answer to proceed to the fourth of five pages)

1. A thoracic CT scan should be done next
2. Another course of antibiotics is appropriate
3. The density is located in the anterior chest
4. 1 and 3
5. All of the above

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