Soft Tissue Masses
Usual course: 8–10 months of rapid growth shortly after birth followed by involution US High vascular density (5 vessels/cm2) Many surrounding vessels have low-resistance waveforms Usually hypoechoic and well defined…
The Pelvis and Hip: Acquired Disorders
Fig. 12.1 Intertrochanteric fracture in a 15-year-old girl whose leg tangled in a swing as she fell. The fracture (arrow) required plate and screw fixation Femoral head dislocations are largely…
Musculoskeletal Infection
Radiography: Early: deep soft tissue swelling Mid: cortical fraying Late: moth eaten MRI: positive 2 days after symptoms Overestimates extent T1 wide zone of transition Cortical destruction and periosteal elevation…
Orthopedic Procedures
Fig. 27.1 Posterior spinal fusion (PSFI) with instrumentation. (a, b) There are hooks (white arrows) above the laminae of T2, and screws (black arrows) have been inserted through the pedicles…
The Elbow and Forearm: Acquired Disorders
Fig. 8.1 (a, b) Six ossification centers of the distal humerus. C capitulum, R radial head, M medial epicondyle, O olecranon, T trochlea, L lateral epicondyle Box 8.1: Typical Order…
Tumors and Tumor-Like Conditions of Bone
Benign Malignant Bone-forming tumors Osteoblastoma Osteosarcoma Osteoid osteoma Cartilage-forming tumors Chondroblastoma Chondrosarcoma Chondromyxoid fibroma Enchondroma Osteochondroma Cystic lesions Aneurysmal bone cyst Unicameral (simple) bone cyst Fibro-osseous lesions Fibrous dysplasia…
The Elbow and Forearm: Congenital and Developmental Conditions
Fig. 7.1 Normal granular-appearing trochlear ossification center (arrow) in a 9-year-old boy Supracondylar Process The supracondylar process of the humerus occurs in approximately one percent of patients. This bony spur…
The Hand and Wrist: Congenital and Developmental Conditions
Fig. 9.1 Pronator fat plane in a 9-year-old girl. The fat that lies volar to the pronator quadratus muscle is well shown (arrow) 2 Carpal Coalition Carpal fusion or coalition…
The Foot and Ankle: Acquired Disorders
Fig. 16.1 Juvenile Tillaux fracture in an 11-year-old boy. (a, b) There is a nondisplaced Salter-Harris III fracture, with the vertical epiphyseal fracture line (arrow) lateral to Kump bump (arrowhead)….
