Ankylosing Spondylitis
Ankylosing spondylitis is the chronic inflammatory disease that affects primarily the axial skeleton and only secondarily the appendicular skeleton. It is seen predominantly in males between the ages of 15…
RHEUMATOLOGY
Diffuse Idiopathic Skeletal Hyperostosis
Diffuse idiopathic skeletal hyperostosis (DISH), also known as ankylosing hyperostosis or Forestier disease, is not an arthropathy. The articular cartilage, adjacent bone margins, and synovium are not affected. DISH appears…
Hydroxyapatite Deposition Disease
Hydroxyapatite deposition disease (HADD) is an extremely common disorder causing periarticular disease in the form of tendinitis or bursitis. Only rarely does it cause true articular disease. Calcium hydroxyapatite deposits…
Collagen Vascular Diseases (Connective Tissue Diseases)
The collagen vascular diseases (connective tissue diseases) are a group of diseases that have multiple, varied systemic manifestations. Articular symptoms play a minor role in the total clinical picture and…
The Sacroiliac Joint
The sacroiliac (SI) joint is perhaps the most difficult joint in the skeleton to image adequately to make an accurate diagnosis of a disorder affecting it. This is partially due…
Neuropathic Osteoarthropathy
Neuropathic osteoarthropathy presents the most dramatic radiographic picture of all of the arthropathies. As a result, it may produce a diagnostic dilemma. Although it is known that various neurological disorders…
Miscellaneous Deposition Diseases
Three deposition diseases are discussed in this chapter: hemochromatosis, Wilson disease, and ochronosis. Two of these diseases are extremely rare. Each has been associated with radiographic chondrocalcinosis, or calcification of…
Mass-Like Arthropathies
The articular disorders that will be discussed in this chapter, pigmented villonodular synovitis, synovial chondromatosis, and amyloidosis, share some common radiologic imaging characteristics. These entities are more common in large…
Approach to the Knee
As in the hip, the diagnosis of a disorder of the knee depends foremost on the evaluation of true joint space involvement. This evaluation is made most accurately through an…
The “Phytes” of the Spine
In evaluating the spine, one observes the size, shape, and mineralization of the different vertebral bodies. These parameters become abnormal in various systemic diseases. For example, a large vertebral body…
