[Diagnostics of joint pain in children--controversies].

Musculoskeletal symptoms can be a manifestation of varied conditions and ailments which are not connected with rheumatic diseases. The aim of the article is to present some controversial elements of differential diagnosis of joint pain in children. Insidious course of the disease can be a cause of diagnostic errors and delays in introducing effective treatment. The article recalls differentiation between rheumatic diseases and neoplastic diseases, osteonecrosis, fibromyalgia and growing pains.