case_images: PMC10907129_01
case_images: Thorax CT before treatment initiation. Intravenous contrast was administered prior to the exam. Extra pulmonary mass that infiltrates the thoracic cage and the ribs, as shown with the red arrow.
case_images: IMCRJ-17-143-g0001.jpg
case_images: PMC10907129_01_IMCRJ-17-143-g0001.jpg
case_images: f0001
case_images: The patient underwent a thorax CT, which revealed an extended goiter and extra pulmonary masses infiltrating the thoracic cage and the ribs (Figure 1).
case_images: Biopsy from one of the osteolytic rib lesions shows bland fibroblastic spindle cell proliferation admixed with numerous osteoclastic giant cells(arrows), findings which in context are most suggestive of bone changes due to hyperparathyroidism (hematoxylin-eosin, x200).
case_images: IMCRJ-17-143-g0002.jpg
case_images: PMC10907129_01_IMCRJ-17-143-g0002.jpg
case_images: f0002
case_images: Therefore, the diagnosis of brown tumors was confirmed by histological examination (Figure 2).
case_images: Thorax CT after i.v contrast, 18 months post treatment showed regression of the tumor in the thoracic cage (from 4.7x3.9 to 4.3x2.8 cm) and the ribs, as shown with the red arrow.
case_images: IMCRJ-17-143-g0003.jpg
case_images: PMC10907129_01_IMCRJ-17-143-g0003.jpg
case_images: f0003
case_images: The lesions appeared well defined and ossification had started (Figure 3).