PMC3425232_01
Tc-99m MIBI scans of neck and thoracic region obtained at 5, 10, 60 and 120 min showing a solitary focus of increased MIBI uptake (arrow) in the ectopic parathyroid located in the anterior mediastinum
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F1
A focus of intense MIBI uptake was detected in the anterior mediastinum on all planar images obtained at 5.10,60 and 120 min [Figure 1a].
Tc-99m MIBI SPECT-CT study of the chest. Cross sectional images revealed a Tc-99m MIBI avid soft tissue lesion in the anterior mediastinum adjacent to ascending aorta (image (a) red arrow), which was confirmed to be a parathyroid adenoma on histopathological examination. Multiple well-defined marginated expansile lytic lesions (Brown tumors) are noted in the ribs (images (b-d); arrows)
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F2
The SPECT/CT scan confirmed the presence of a Tc-99m MIBI avid soft tissue nodule adjacent to the ascending aorta (size 23 x 17 mm) [Figure 2a]. The SPECT/CT images also revealed multiple expansive septate cystic lesions in the ribs showing minimal MIBI uptake [Figures 2 b-d] consistent with "brown tumors".