Fig. 1: Imaging findings in malignant chondroblastoma and chondroblastoma-like osteosarcoma. | Modern Pathology

Fig. 1: Imaging findings in malignant chondroblastoma and chondroblastoma-like osteosarcoma.

From: Clinicopathologic characterization of malignant chondroblastoma: a neoplasm with locally aggressive behavior and metastatic potential that closely mimics chondroblastoma-like osteosarcoma

Fig. 1

a Malignant chondroblastoma (case 2). Axial CT of the ankle performed as part of a CT-guided biopsy demonstrates an expansile lytic lesion in the talus (asterisk) with cortical destruction and areas of thin peripheral calcifications (arrows) and internal trabeculations (arrowhead). b–c Malignant chondroblastoma (case 3). Axial T1-weighted (b) and fat suppressed T2-weighted (c) MR images demonstrate T1 hypointense and T2 hyperintense signal of the lesion of the left anterior 4th rib (arrows). d–e Metastatic malignant chondroblastoma (case 1). Axial CT (d) demonstrates a lytic lesion (asterisk) in the greater trochanter, with thin sclerotic margins (arrow), consistent with tumor metastasis. Coronal reformatted CT (e) demonstrates tumor recurrence of the medial femoral neck with expansile lytic lesion extending into the lesser trochanter (asterisk) and thin sclerotic margin (arrow). This image represents the third recurrence at this metastatic site. Metastatic malignant chondroblastoma exhibits similar findings to those of primary tumors. f–g Chondroblastoma-like osteosarcoma (case 10). Coronal reformatted CT (f) demonstrates a lytic lesion with cortical break and pathologic fracture (arrow) of the proximal humeral metaphysis and epiphysis. Faint internal areas of trabeculation are present (arrowhead). Sagittal reformatted CT (g) performed 13 years later demonstrates tumor recurrence as a large lytic expansile lesion with internal trabeculations.

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