Radiology Key

Joint Effusion DIFFERENTIAL DIAGNOSIS Common • Osteoarthritis Less Common • Inflammatory Arthropathy • Crystal Arthropathy • Infective Arthritis • Hemarthrosis • Lipohemarthrosis • Pigmented Villonodular Synovitis • Synovial Osteochondromatosis ESSENTIAL INFORMATION Key Differential Diagnosis Issues • Characterization of underlying…

Elbow GROSS ANATOMY Joint Capsule Attachments • Posterior  Proximally attaches to humerus proximal to olecranon fossa and capitellum; distally attaches to proximal ulna • Anterior  Proximally attaches to humerus proximal to coronoid…

Musculoskeletal Ultrasound Artifacts Definition A US artifact is a feature seen on an image that is not representative of the tissue being scanned. These may be either technology or technique…

Wrist TERMINOLOGY Definitions • Articulation complex comprising distal radioulnar, radiocarpal, ulnocarpal, pisotriquetral, midcarpal, and carpometacarpal joints IMAGING ANATOMY Osseous Structures • Distal radius: Lister tubercle on dorsal surface acts as fulcrum for…

Dermatofibrosarcoma Protuberans KEY FACTS Terminology • Low-grade spindle cell mesenchymal sarcoma of dermis and subcutis Imaging • Nearly always arising from dermis, then infiltrates subcutaneous tissue  Most commonly arises in trunk (~…

Hand Ultrasound KEY FACTS GENERAL CONSIDERATIONS • Common specific indications: Tenosynovitis, tendinosis, trigger finger, tendon rupture and other tendon disorders, joint inflammation, & ulnar collateral ligament (UCL) injury • Left common specific…

Abdominal Wall TERMINOLOGY Definitions • Abdomen: Region between diaphragm and pelvis GROSS ANATOMY Anatomic Boundaries of Anterior Abdominal Wall • Superiorly: Xiphoid process and costal cartilages of 7th-10th ribs • Inferiorly: Iliac crest,…

Fingers TERMINOLOGY Abbreviations • Extensor digitorum communis (EDC) • Extensor digiti minimi (EDM) • Interphalangeal (IP) joint • Interphalangeal (MCP) joint GROSS ANATOMY Muscles • Flexor aspect  Flexor digitorum superficialis – Origin: Common flexor tendon origin…

Femoral Vessels and Nerves IMAGING ANATOMY Femoral Vessels • Enter thigh deep to inguinal ligament midway between anterior superior iliac spine and pubic symphysis  External iliac vessels become common femoral vessels…

Axilla TERMINOLOGY Definitions • Fat-filled space between upper arm and lateral chest wall IMAGING ANATOMY Extent • Axilla is shaped like a pyramid • Consists of apex, base, and 4 walls  Apex – Bounded…