Psoriatic arthritis Quiz: Ace Your Exams

Get ready to dominate your medical and nursing exams by using our dynamic quizzes to elevate your knowledge and increase your confidence. Whether you're gearing up for the USMLE®, COMLEX®, or your next in-class assessment, Osmosis quizzes tackle key topics in pathology, diagnostics, and treatment approaches. By honing in on clinical readiness and decision-making, we make sure the knowledge you gain empowers you both in the classroom and in real-world practice. Jump in and supercharge your exam prep!

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A 45-year-old man presents to the clinic with a three-month history of joint pain. He has been experiencing pain, stiffness, and swelling in his fingers and toes. The pain has gradually become worse and makes it difficult for him to work. He has not had pain in the elbows, knees, or lower back. He has no significant past medical history, but his father has psoriasis.  Temperature is 37°C (98.7°F), pulse is 86/min, and blood pressure is 118/70 mmHg.  Thick, scaly, silvery-white skin plaques with punctate bleeding spots are noted on the extensor surface of both elbows.  Examination of the joints reveals swelling and tenderness of multiple joints of the fingers and toes. Transverse depressions, subungual hyperkeratosis, and pitting of the nails are seen. Which of the following laboratory findings is most likely to be associated with this patient’s underlying condition?

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