Atypical osteochondroma of the lumbar spine associated with suprasellar pineal germinoma: A case report

Figure 1 Anterior to posterior and lateral radiographs demonstrating calcified, pedunculated mass protruding from the posterior elements of the L5-S1 vertebral interval. A: Anterior to posterior radiograph; B: Lateral radiograph.

Figure 2 Computed tomography imagines. A: Axial computed tomography imaging demonstrating osteochondroma protruding from right spinous process/Lamina junction; B: Sagittal computed tomography imaging at the level of the L5/S1 facet joint depicts mass involvement of the right inferior articular process of L5. An ultrasonic bone scalpel was used to remove the mass en bloc from the articular process without disrupting the facet capsule.

Figure 3  Sagittal T2 magnetic resonance image demonstrating the well-defined 1. 5 cm cartilaginous cap of the lumbar osteochondroma extending into the right paraspinal musculature.

Figure 4  Gross specimen of excised lumbar mass measuring 3. 8 cm × 3.5 cm × 2.5 cm with cartilaginous cap and smooth muscle margin.

Figure 5  Histology of excised mass demonstrating mature cartilage, fibrous perichondrium, and trabecular bone without evidence of cellular atypia or malignant transformation; consistent with osteochondroma.