<prompt> The condition which characteristically shows bone infarcts is:Iron deficiency anaemiaThalassemiaSickle cell anaemiaHereditary spherocytosis  <response>: Bone marrow infarcts are frequent causes of pain in sickle cell anaemia. The heads of the femur and humerus are susceptible to avascular necrosis, a potential source of constant pain and disability. Ischemic bone becomes susceptible to bacterial osteomyelitis. Joint effusions and occasionally hemahrosis may be seen adjacent to infarcted bones. Ref: Kato G.J., Gladwin M.T. 2005. Chapter 108. Sickle Cell Disease. In J.B. Hall, G.A. Schmidt, L.D. Wood Eds, Principles of Critical Care, 3e. 