case_images: PMC6195923_01
case_images: (a,b) Anteroposterior and lateral (frog leg) radiographs of the left femur demonstrate an extraskeletal lesion with dense minerlization, adjacent to the medial aspect of the femur.
case_images: bjrcr.20150117.g001.jpg
case_images: PMC6195923_01_bjrcr.20150117.g001.jpg
case_images: fig1
case_images: Anteroposterior (AP) and "frog leg" lateral radiographs of the left lower extremity revealed a dense lesion consistent with dense matrix, adjacent to the medial aspect of the femur (Figure 1a,b).
case_images: (a-c) Axial MRI sequences (T
  1 fat-saturated, T
  2 and T
  1 post-contrast fat-saturated) demonstrate a large mass centred in the adductor magnus of the left thigh with internal calcification and peripheral vascularity. The mass demonstrates intermediate T
  1 signal and increased heterogeneous T
  2 signal (black pepper sign) compared with background muscle. There are no signal abnormalities within the adjacent femur to suggest bony invasion.
case_images: bjrcr.20150117.g002.jpg
case_images: PMC6195923_01_bjrcr.20150117.g002.jpg
case_images: fig2
case_images: An MRI of the left lower extremity revealed that the lesion was of extraskeletal origin, arising from the adductor magnus, without any involvement of the femur (Figures 2a,b, 3).
case_images: (a,b) Coronal T
  1 and sagittal short tau inversion-recovery images demonstrate the superior and inferior margins of the mass, again without evidence of signal abnormality in the adjacent femur to suggest bony invasion.
case_images: bjrcr.20150117.g003.jpg
case_images: PMC6195923_01_bjrcr.20150117.g003.jpg
case_images: fig3
case_images: An MRI of the left lower extremity revealed that the lesion was of extraskeletal origin, arising from the adductor magnus, without any involvement of the femur (Figures 2a,b, 3).
case_images: An axial CT image of the chest, with intravenous contrast, demonstrates a 2.3-cm right basilar nodule (arrow), confirmed to be a metastatic focus. Multiple additional smaller pulmonary nodules were seen throughout the lung parenchyma (not shown).
case_images: bjrcr.20150117.g004.jpg
case_images: PMC6195923_01_bjrcr.20150117.g004.jpg
case_images: fig4
case_images: At 18 months, multiple bilateral non-calcified pulmonary nodules concerning for metastasis were identified (Figure 4).
case_images: (a,b) A hypodense pedunculated mass measuring 1.6 cm in greatest dimension, representing adrenal metastasis (arrow).
case_images: bjrcr.20150117.g005.jpg
case_images: PMC6195923_01_bjrcr.20150117.g005.jpg
case_images: fig5
case_images: The most prominent pulmonary nodule was present within the posterior right base, measuring 2.3 cm in the greatest dimension and abutting the pleura (Figure 5).