This book is meant for the practicing rheumatologist. It will also be useful for postgraduate students and internists with an interest in Rheumatology. It intends to familiarize clinicians involved in the care of patients with spondyloarthritis (SpA) with various common and uncommon imaging features of these disorders. In addition, it will serve as a reference for comparison of imaging features observed by clinicians in their day-to-day practice. The purpose is to make it easier for a rheumatologist to understand the report given by a radiologist in this context and to participate with a basic understanding during multidisciplinary meetings involving radiology colleagues. The aim is to ensure better patient care through shared understanding of imaging findings.