Which symptom is commonly associated with both Ankylosing Spondylitis and Reactive Arthritis?

Uveitis is a significant condition associated with both Ankylosing Spondylitis and Reactive Arthritis. Patients with Ankylosing Spondylitis frequently experience uveitis as an extra-articular manifestation, which can lead to pain, redness, and vision disturbances. The connection between these two diseases lies in their shared association with HLA-B27 antigen, which increases the risk of developing uveitis in affected individuals.

In Reactive Arthritis, which often arises following infections like Chlamydia or gastrointestinal diseases, uveitis can also occur as part of the syndrome. This condition illustrates the systemic involvement that can happen beyond the primary joint symptoms, emphasizing the importance of addressing potential ocular complications in these patients.

The other options listed do not have a direct connection to both Ankylosing Spondylitis and Reactive Arthritis. Hematuria is generally related to renal involvement and does not specifically link these two conditions. Fibromyalgia is a separate chronic pain syndrome that can co-exist with many conditions but isn’t specifically tied to either Ankylosing Spondylitis or Reactive Arthritis. Psoriasis is commonly associated with other forms of arthritis, particularly Psoriatic Arthritis, rather than these two.