Radiology Key

Paget Disease Pathophysiology Paget disease, a relatively common bone disorder, is a chronic, progressive disturbance in bone metabolism that primarily affects older persons. It is slightly more common in men…

Malignant Bone Tumors I: Osteosarcomas and Chondrosarcomas Osteosarcomas Osteosarcoma (osteogenic sarcoma) is one of the most common primary malignant bone tumors, comprising approximately 20% of all primary bone malignancies. There…

Benign Tumors and Tumor-like Lesions II: Lesions of Cartilaginous Origin Benign Chondroblastic Lesions Diagnosis of a bone lesion as originating from cartilage is usually a simple task for the radiologist….

Tumors and Tumor-Like Lesions of the Joints Benign Lesions Synovial (Osteo)Chondromatosis Synovial (osteo)chondromatosis (also known as synovial chondromatosis or synovial chondrometaplasia) is an uncommon benign disorder marked by the metaplastic…

Radiologic Evaluation of Skeletal Anomalies Classification The conditions discussed in this part comprise disturbances in skeletal formation, development, growth, maturation, and modeling. Some of these anomalies arise during fetal development,…

Miscellaneous Metabolic and Endocrine Disorders Familial Idiopathic Hyperphosphatasia Familial idiopathic hyperphosphatasia, also known as hyperostosis corticalis deformans juvenilis, familial osteoectasia, or juvenile Paget disease, is a rare autosomal recessive disorder…

Upper Limb I: Shoulder Girdle Shoulder Girdle Trauma to the shoulder girdle is common throughout life, but the site of injury varies with age. In children and adolescents, fracture of…

Inflammatory Arthritides The inflammatory arthritides comprise a group of different and for the most part systemic disorders (see Fig. 12.1) that have in common one important feature: inflammatory pannus eroding…

Benign Tumors and Tumor-like Lesions III: Fibrous, Fibroosseus, and Fibrohistiocytic Lesions Fibrous Cortical Defect and Nonossifying Fibroma Fibrous cortical defects and nonossifying (nonosteogenic) fibromas are the most common fibrous lesions…

Osteoporosis, Rickets, and Osteomalacia Osteoporosis Osteoporosis is a generalized metabolic bone disease characterized by insufficient formation or increased resorption of bone matrix that results in decreased bone mass and microarchitectural…