A 71 year old man presents with persistent lower back pain for one and a half months. The pain is dull and aching in nature and does not radiate. There is no history of recent trauma.

His co-morbidities are well controlled hypertension for 15 years and ischemic heart disease for which coronary artery bypass grafting was performed 10 years ago.

A full blood count and urinalysis are found to be normal.