Indicators for the Development/Presence of Symptomatic or Invasive Vertebral Haemangioma: Nuclear Imaging and Anatomic Markers in Tumor Structure Low signal intensity on T-1 weighted Magnetic Resonance Imaging Evidence of expansion of haemangioma into the epidural space Irregular ''honey-comb'' pattern on X-ray Extension into posterior elements i.e. pedicles, lamina, neural arch Complete vertebral body involvement  Variable post-contrast enhancement on CT or MRI Hypodense mass with soft tissue invasion Cortical expansion and pathologic fracture

Table 1: Pertinent imaging characteristics often observed in atypical and aggressive primary intraosseous haemangiomas.