Sacral chondroblastoma — a rare location, a rare pathology: A case report and review of literature

Figure 1 Computed tomography showed shows an osteolytic lesion with irregular margins and cortical breach. A: First preoperative sagittal computed tomography (CT) images (bone window); B: First preoperative sagittal CT images (soft-tissue window); C: First preoperative axial CT images (bone window); D: First preoperative axial CT images (soft-tissue window).

Figure 2 Magnetic resonance images showed that the sacrococcygeal an irregular nodular lesion, with low T1 and high T2 signal, with avid enhancement. A: First preoperative T1-weighted sagittal magnetic resonance (MR) images; B: First preoperative T2-weighted sagittal MR images; C: First preoperative sagittal contrast-enhanced T1-weighted MR images; D: First preoperative sagittal contrast-enhanced T2-weighted MR images.

Figure 3 Hematoxylin-eosin staining. A: First histology of chondroblastoma of hematoxylin-eosin (HE) staining: Proliferating fibroblasts, multinucleated giant cells and proliferating cartilage tissue were seen in HE-stained pathological sections; B: Second histology of chondroblastoma of HE staining: Proliferating chondroblasts and cartilage-like matrix with scattered multinucleated giant cells were seen in HE-stained pathological sections.

Figure 4 Magnetic resonance images showed an interval increase in the lesion with presacral extension, with low T1, high T2 signal, and avid enhancement. A: Second preoperative T1-weighted sagittal magnetic resonance (MR) images; B: Second preoperative T2-weighted sagittal MR images; C: Second preoperative contrast-enhanced T1-weighted MR images; D: Second preoperative contrast-enhanced T2-weighted MR images.