Adolescent met Tenosynoviale Giant Cell Tumor (TGCT) van de heup presenteert zich met kniepijn

Adolescent with Tenosynovial Giant Cell Tumour (TGCT) of the hip presenting with knee pain Background: Tenosynovial Giant Cell Tumour (TGCT) is a rare, benign tumor of the joints, bursae and tendon sheaths. It is usually limited to one joint and is often diagnosed late (1, 2). TGCT located at the hip joint is mostly seen between the second and third decade of life (3). Case description: A 19-year-old woman consulted with chronic knee pain that had worsened over the last year, accompanied by a sensation of blockage in the right hip and a reduced agility. Following technical investigations TGCT of the hip was diagnosed. Treatment involved an open dislocation and synovectomy, which resolved both the knee and hip pain. Conclusion: This case demonstrates the importance of thorough clinical examination. A complete clinical examination of the knee should include an examination of the hip, particularly in persistent gonalgia and in young athletes with gonalgia. Overlooking this step can lead to delayed diagnosis with implications on prognosis and invasiveness of required treatments.