The debut of acute lymphoblastic leukemia under the guise of juvenile idiopathic arthritis

The bone and joint syndrome is observed in one out of every three patients with acute lymphoblastic leukemia. In some cases, arthralgia and arthritis comprise the first and only manifestations of the disease. This complicates the diagnostic process and leads to a late diagnosis. The study presents a clinical case of the onset of acute leukemia in a child with bone and joint involvement. The development of joint syndrome in acute lymphoblastic leukemia highlights the necessity for careful examination of the medical history, clinical findings, and laboratory data in patients with a suspected diagnosis of juvenile idiopathic arthritis.