Preface| Volume 61, ISSUE 2, Pxv, March 2023

Imaging of the Lower Limb

      The lower limbs support the weight of our bodies for our whole lives. The lower limbs have different biomechanical properties, sizes, proportions or symmetry, and vectors among individuals. Moreover, some of these features change with aging. The support offered by the lower limbs to the trunk (and to other parts of the body) implies a constant and diverse work for them, whether we are standing, walking, running, or practicing different kinds of sports and work-related activities. Joints and specific musculoskeletal structures of the lower limb are put under stress by a diversity of conditions, and this results in different prevalence of pathologic findings and diseases. Trauma of the lower limb is also very common, and imaging plays a fundamental role in the management of the patient.
      The aim of this issue of Radiologic Clinics of North America is to provide the reader with a comprehensive and up-to-date imaging interpretation of disorders and hot topics related to the lower limb. This issue includes 14 review articles covering different aspects of imaging of the lower limb, with the invaluable contribution of several internationally acclaimed and credited authors.
      The lower limb comprises different joints with completely different anatomy, therefore with significant differences in functions at different levels but still in a complex interaction. That is why it is so important to approach imaging diagnosis after reviewing the anatomy from a functional and surgical point of view. Several articles cover the different aspects of overuse pathology and traumatic injuries, joint by joint.
      The incidence and features of specific rheumatic diseases and tumors, including the difficulties in differential diagnosis, are discussed in two different articles. Two special focus articles address tricks in MR imaging, and peripheral nerve imaging of the lower limb, respectively. At the end of the issue, a review of several interventional imaging-guided procedures on the lower limb is also included.