['Statements have been made in the literature and in legal testimony that misrepresent the radiographic finding of concave distal end of the ulnar metaphysis.', 'To demonstrate that a concave distal end of the ossified ulna in infancy can be normal.', 'Eighty distal wrists of randomly selected infants in the first year of life with radiographic evidence that ruled out rickets were reviewed.', 'In 16 of the cases (20%), mild or moderate concavity of the distal end of the ulna was seen. An intact metaphyseal collar of distal radius or ulna confirmed the absence of radiographic rickets.'] Is concave distal end of ulna metaphysis alone a sign of rickets?