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Figure 3: (a-c) Axial, (d-f) coronal, (g-i) sagittal SPECT, noncontrast CT, and SPECT/CT fused images respectively showed retropharyngeal CT-isodense soft tissue with tracer uptake (arrows) suggestive of an ectopic undescended PTA

Figure 3: (a-c) Axial, (d-f) coronal, (g-i) sagittal SPECT, noncontrast CT, and SPECT/CT fused images respectively showed retropharyngeal CT-isodense soft tissue with tracer uptake (arrows) suggestive of an ectopic undescended PTA