Category of patients with juvenile idiopathic ahritis, with HLA B27 positive in most of the cases, who present with entheisits, lower limb ahritis involving knees and ankle and presence of inflammatory low back pain, is most likely to be

Answer- A. Enthesitis related ahritisAhritis most commonly affects the lower extremities, knees and ankles, but the hip can also be affected.Enthesitis occurs frequently and is commonly seen as plantar fasciitis, achiles tendinitis and patellar tendon enthesitis.Inflammatory back pain is often seen, defined as lumbosacral spinal pain at rest, with morning stiftress that improves on movement.There is a strong association with HLA B27,with most of the patients of enthesitis associated ahritis positive for HLA B27.Iritis, usually acute, severe hip disease.