Ballooning of femoral head in juvenile idiopathic arthritis

Abstract

A 22-year-old female patient with oligoarticular juvenile idiopathic arthritis (JIA) visited the outpatient department with difficulty in walking, climbing stairs and getting up from sitting position. She had pain in both hip and knee joints. On examination, she had no tenderness in both knee and hip joints. However, she had severe restriction of movements at both hip joints in all direction. The X-ray shows diffuse osteoporosis and overgrowth of femoral head compared to the acetabular cavity leading to restriction of hip movements (Fig. 1).