Inadvertent intra-arterial injection of (123)I-MIBG in a patient with metastatic pheochromocytoma.

We present an interesting image of the inadvertent arterial injection of I-MIBG (metaiodobenzylguanidine) in a 36-year-old man with hereditary, metastatic pheochromocytoma, who underwent a diagnostic whole-body scan for the evaluation of extent of disease before possible I-MIBG therapy. During the tracer injection in the left antecubital area, the patient experienced tingling and skin redness in the left forearm and hand.