<prompt> Spur sign isare seen in:Supracondylar fracture of humerusRadial head fractureAcetabulum fracture of pelvisTalus fracture  <response>: Ans. c Acetabulum fracture of pelvisSpur cells-They are irregularly distoed red cells containing several irregularly distributed thorn like projections.Cells with this morphologic abnormality are also called acanthocytes.They are seen in Splenectomised patients and patients with liver disease. 