Figure 4: Axial MR images obtained 11 months earlier (a and b). T1-weighted image (a) and T2-weighted image (b) show that the lesions show no loculations or septae within, hence mimicking spinal tuberculosis. Axial MRI (c) obtained later shows that the lesion has markedly increased in size with multiple loculations and fluid-fluid levels within giving the typical appearance of aneurysmal bone cyst.