Intracortical chondroma of the metacarpal bone: A case report

Figure 1 Radiographs obtained from a 40-year-old man who presented with pain in the left hand. A: Antero-posterior view; B: lateral view radiographs revealed intracortical lucency and cortical thickening of the second metacarpal bone were observed on plain radiographs.

Figure 2 Plain computed tomography images. A: Coronal view; B: Axial view images revealed a 4 mm, well-defined lytic lesion and intra-tumoral punctate calcification. The appearance of this lesion on computed tomography images is almost similar to that of osteoid osteoma.

Figure 3 Magnetic resonance imaging of the second metacarpal bone. A: Low signal intensity on axial T1-weighted images; B: High signal intensity on axial T2-weighted images; C: Axial contrast-enhanced magnetic resonance imaging. Only the tumor margin was enhanced; D: Coronal short tau inversion recovery magnetic resonance imaging.

Figure 4 Histopathological image of the tumor. Hypocellular, cytologically banal hyaline cartilage suggested chondroma and was located in the cortical bone. The sample was stained with hematoxylin-eosin and imaged at × 100 magnification.

Figure 5 Photograph of the intraoperative appearance of the second metacarpal bone. A: Before curettage, protrusion of cortical bone is revealed; B: After curettage, the lesion was completely embedded in the cortical bone.

Figure 6 Postoperative plain radiographs obtained 1 year after treatment with no recurrence. A: Antero-posterior view; B: Lateral view.