There is a large destructive tumour centred on the right side of the C4 vertebral body, and extending into the right C4 lateral mass, pedicle and lamina. It protrudes into the spinal canal at this level although there is no obvious impingement on the spinal cord within the limits of this CT.
There is very slight erosion of the right posterior corner of the adjacent C3 inferior endplate and the right posterior corner of the adjacent C5 superior endplate.
CONCLUSION: MRI is recommended for further evaluation of the extent of the mass, better evaluation of the spinal cord.