Inadvertent intraosseous gadolinium injection during pediatric shoulder MR arthrography.

A variety of problems can arise while performing MR arthrography of the shoulder. These have been well documented in the literature and range from improper patient selection to errors in technique or in the choice of imaging sequences. We present a rare case of inadvertent, painless intraosseous injection of dilute gadolinium into the proximal humeral epiphysis of a 13-year-old male athlete. The clinical relevance is discussed and technical recommendations are offered.