RESUMO
INTRODUCTION: Osteochondrosis of humeral capitellum (Panner's disease) is a rare condition. Very few cases are reported in the literature and may be overlooked or misdiagnosed. Most cases are unilateral in distribution and occur in young boys during the first decade of life. It is often difficult to distinguish osteochondrosis from osteochondritis dissecans of the humeral capitellum that occurs in older children and adolescents in the second decade of life. CASE REPORT: We describe a case of a 6-year-old boy who presented with pain, subtle swelling and limited extension in his right elbow following a fall. Diagnosis of Panner's disease was made 2 weeks later on follow-up based on classical features on plain radiograph of joint effusion, irregular delineation of the articular contour, and faint sclerosis of the capitellum with a radiolucent line in the subchondral bone. The patient had uneventful full functional recovery with conservative treatment: Rest, temporary immobilization, and subsequent remobilization. CONCLUSION: Osteochondrosis of humeral capitellum though rare is a known condition. It may be overlooked or misdiagnosed. High degree of awareness is required and diagnosis can be made with utmost care based on the age of presentation, clinical signs and clearly recognizable plain radiographic features of joint effusion, irregular articular outline with radiolucent line in subchondral bone and faint sclerosis of capitellum.
