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3077 Medicine

A 23-year-old man presents to the clinic for assessment of a gradual but progressive increase in breathing difficulty. He mentions a long history of back pain with prolonged morning stiffness. His past medical history is also significant for an episode of iritis in the past.On physical examination, the pertinent findings are a reduced range of motion in the lumbar spine with forward flexion and pain on palpation of the sacroiliac joint and surrounding soft tissue. X-rays of the pelvis show erosions and sclerosis of the sacroiliac joint. Which of the following is the most likely pulmonary complication of this condition?

Aupper lobe fibrosis
Bairflow obstruction
Cchronic pulmonary embolism
Dpleural effusions
Medicine
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