A 32-year-old man with a 5-year history of ulcerative colitis (UC) presents to the clinic with complaints of eye pain, redness, and blurred vision over the past few days. He also reports a recent onset of joint pain and stiffness, particularly in his lower back, that worsens in the morning and improves with activity. He mentions intermittent painful red nodules on his legs and has had jaundice and fatigue for the last few weeks. On examination, his sclerae are injected, and there is tenderness over the sacroiliac joints. His skin shows erythematous, tender nodules on the anterior shins. Laboratory tests reveal elevated alkaline phosphatase and gamma-glutamyltransferase (GGT). Which of the following is an extraintestinal manifestation of ulcerative colitis?
