Enthesitis Related Arthritis (ERA) in an Adolescent Female: Navigating the Diagnostic Dilemma of Juvenile Spondyloarthropathies

Enthesitis-Related Arthritis (ERA) is a subtype of juvenile idiopathic arthritis (JIA) characterized by inflammation at the entheses. This case report discusses a 17-year-old female who presented with a two-week history of fever and bilateral hip pain. Despite initial suspicion of septic or tuberculous arthritis, positive HLA-B27 markers and MRI findings led to a diagnosis of ERA. The patient showed significant improvement following a regimen of Naproxen and Methotrexate. This case highlights the challenges of diagnosing adolescent spondyloarthritis in settings where infectious mimics are prevalent.