case_images: PMC4841893_01
case_images: A 35-year-old woman with gradually swelling of the right maxilla. Axial (A) and coronal (B) view of postcontrast facial CT revealed a large lytic expansile multi-septated mass lesion in right maxillary sinus containing septa. Adjacent soft tissue is unremarkable.
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case_images: PMC4841893_01_iranjradiol-13-01-13260-g001.jpg
case_images: fig20479
case_images: Postpartum CT scan of the maxillofacial region revealed a large lytic expansile multi-septated mass along the right maxillary sinus and buccal region (60 x 52 x 45 mm) (Figure 1).
case_images: Neck sonography showed a 27 x 14 x 11 mm mixed hypo echoic mass lesion in posterior aspect of right thyroid lobe compatible with vascular parathyroid mass (A,B).
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case_images: PMC4841893_01_iranjradiol-13-01-13260-g002.jpg
case_images: fig20480
case_images: In ultrasonography, a 11 x 14 x 27 mm mixed hypo echo mass lesion was seen in posterior aspect of right thyroid lobe compatible with probable vascular parathyroid mass (Figure 2).
case_images: Radioisotope scan (Tc-99 m sestamibi) depicted a right parathyroid hyperplasia. Persistent concentration of radiotracer (after 2 hours injection) in posterior aspect of right thyroid lobe by Tc 99 m sestamibi scan delineated a right parathyroid hyperplasia.
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case_images: PMC4841893_01_iranjradiol-13-01-13260-g003.jpg
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case_images: In sestamibi isotope scan, increased uptake in posterior aspect of right thyroid lobe suggested a right parathyroid adenoma or hyperplasia (Figure 3).
case_images: In histopathology, the cells had a uniform shape with rounded nucleoli and pale eosinophilic cytoplasm without evidence of fat within the
  cytoplasm. (A) H and E (x 40), (B) H and E (x 100)
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case_images: PMC4841893_01_iranjradiol-13-01-13260-g004.jpg
case_images: fig20482
case_images: Cells organizing the mass had a uniform shape with rounded nucleoli and pale eosinophilic cytoplasm without evidence of fat within the cytoplasm (Figure 4).