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Click This is a 10 year-old male who would be diagnosed 2.75 years later with a low-grade chondrosarcoma. This axial STIR MR sequence of the left hip took place 3 weeks after the initial hip radiographs. This image stack corresponds to figure 2a. It demonstrates a round, 8-9mm lesion located centrally in the proximal left femur that is STIR hyperintense. The imaging parameters for this Philips 1.5 T MR axial T1WI sequence are as follows: supine, TR 3400, TE 81, ST 3.

Click This is a 10 year-old male who would be diagnosed 2.75 years later with a low-grade chondrosarcoma. This axial T1WI MR sequence of the left hip took place 3 weeks after the initial hip radiographs. This image stack corresponds to figure 2b. It demonstrates a round, 8-9mm lesion located centrally in the proximal left femur that is T1WI hypointense. The imaging parameters for this Philips 1.5 T MR axial T1WI sequence are as follows: TR 657, TE 24, ST 3.

Click This is a 10 year-old male who would be diagnosed 2.75 years later with a low-grade chondrosarcoma. This axial post-contrast T1WI fat-sat MR sequence of the left hip took place 3 weeks after the initial hip radiographs. This image stack corresponds to figure 2c. It demonstrates a round, enhancing, 8-9mm lesion located centrally in the proximal left femur. The imaging parameters for this Philips 1.5 T MR axial post-contrast T1WI fat-sat sequence are as follows: 10 cc Magnevist, TR 855, TE 24, ST 3.

Click This is a 10 year-old male who would be diagnosed 2.75 years later with a low-grade chondrosarcoma. This coronal STIR MR sequence of the left hip took place 3 weeks after the initial hip radiographs. This image stack corresponds to figure 2d. It demonstrates a round, 8-9mm lesion located centrally in the proximal left femur that is STIR hyperintense. The imaging parameters for this Philips 1.5 T MR coronal STIR sequence are as follows: TR 4420, TE 40, ST 2.

Click This is a 10 year-old male who would be diagnosed 2.75 years later with a low-grade chondrosarcoma. This coronal T1WI MR sequence of the left hip took place 3 weeks after the initial hip radiographs. This image stack corresponds to figure 2e. It demonstrates a round, 8-9mm lesion located centrally in the proximal left femur that is T1WI hypointense. The imaging parameters for this Philips 1.5 T MR coronal T1WI sequence are as follows: TR 604, TE 25, ST 2.

Click This is a 10 year-old male who would be diagnosed 2.75 years later with a low-grade chondrosarcoma. This coronal post-contrast T1WI fat-sat MR sequence of the left hip took place 3 weeks after the initial hip radiographs. This image stack corresponds to figure 2f. It demonstrates a round, enhancing 8-9mm lesion located centrally in the proximal left femur. The imaging parameters for this Philips 1.5 T MR coronal post-contrast T1WI fat-sat sequence are as follows: 10 cc Magnevist, TR 767, TE 25, ST 2.

Click This is a 12 year-old male who was diagnosed with a low-grade chondrosarcoma a few days after this CT. This sagittal CT reconstruction of the left took place one day after the radiographs of the pathologic fracture (figure 4). This image stack corresponds to figure 5a. It demonstrates a fracture through the 3.5 cm, hypodense mass centered in the proximal femur. The 64 slice CT exam was performed supine with a kVp of 120, mA of 120, ST of 1.

Click This is a 12 year-old male who was diagnosed with a low-grade chondrosarcoma a few days after this CT. This coronal CT reconstruction of the left took place one day after the radiographs of the pathologic fracture (figure 4). This image stack corresponds to figure 5b. It demonstrates a fracture through the 3.5 cm, hypodense mass centered in the proximal femur. The 64 slice CT exam was performed supine with a kVp of 120, mA of 120, ST of 1.

Click This is a 12 year-old male who was diagnosed with a low-grade chondrosarcoma a few days after this CT. This axial CT sequence of the left took place one day after the radiographs of the pathologic fracture (figure 4). This image stack corresponds to figure 5c and d. It demonstrates a fracture through the 3.5 cm, hypodense mass centered in the proximal femur. In addition the axial images best depict the endosteal scalloping. The 64 slice CT exam was performed supine with a kVp of 120, mA of 120, ST of 5.

Click This is a 12 year-old male who was diagnosed with a low-grade chondrosarcoma a few days after this MRI. This coronal STIR MR sequence of the left hip took place one day after the radiographs of the pathologic fracture (figure 4). This image stack corresponds to figure 6a. It demonstrates a 3.5 cm, STIR hyperintense (bright) lobulated mass with extensive adjacent edema surrounding the pathologic fracture. The imaging parameters for this Philips 1.5 T MR coronal post-contrast T1WI fat-sat sequence are as follows: TR 3858, TE 15, ST 5.

Click This is a 12 year-old male who was diagnosed with a low-grade chondrosarcoma a few days after this MRI. This coronal post-contrast T1WI with fat-suppression MR sequence of the left hip took place one day after the radiographs of the pathologic fracture (figure 4). This image stack corresponds to figure 6b. It demonstrates the enhancing mass in proximal femur superior to the patholigc fracture. The imaging parameters for this Philips 1.5 T MR coronal post-contrast T1WI fat-sat sequence are as follows: 10 cc Magnevist, TR 715, TE 15, ST 2.91.

Click This is a 12 year-old male who was diagnosed with a low-grade chondrosarcoma a few days after this MRI. This axial post-contrast T1WI fat-sat MR sequence of the left hip took place one day after the radiographs of the pathologic fracture (figure 4). This image stack corresponds to figure 6c and d. It demonstrates a enhancing mass in the proximal left femur superior to the pathologic fracture. The mass demonstrates both peripheral and central nodular enhancement. The imaging parameters for this Philips 1.5 T MR axial post-contrast T1WI fat-sat sequence are as follows: 10 cc Magnevist, TR 630, TE 10, ST 3.