Figure 2. (A) ¹²³I-MIBG whole body image 24 h post injection, showing multiple foci of increased tracer uptake in the skull vault, spine, ribs and pelvis. (B) ¹³¹I-MIBG whole body image 7 days post therapy (12.1 GBq) shows a pattern similar to (A). (C) After approximately 36.8 GBq (993 mCi) of ¹³¹I-MIBG therapy given in three cycles, a follow-up ¹²³I-MIBG scan shows minimal residual disease. (D) A second follow-up diagnostic ¹²³I-MIBG scan shows progression of disease. MIBG-avid lesions are noted in the spine, ribs and soft tissues along the paraaortic region.

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