USMLE® Step 1 style questions USMLE
USMLE® Step 2 style questions USMLE
A 20-year-old man presents to the office because of joint pain, particularly in his fingers. Physical examination shows significant swelling of his fingers and pitting in his fingernails. He is most tender to palpation across his DIP joints. Three months ago, he visited the office because of a rash, shown below. Besides some itching, he denied any other symptoms. Topical treatments helped with the itching. Which of the following haplotypes is most commonly associated with this condition?