Tendon Swelling
ESSENTIAL INFORMATION
Key Differential Diagnosis Issues
Tendinosis: Tendon disease with secondary involvement of peritendinous structures
Tendinosis results from microtears, proteoglycan deposition, and collagen disorganization
Tendinosis is not primary inflammatory disease
Tendinosis affects any tendon
Tendinosis often affects only segment of tendon
Tendinosis is often subclinical
Tendinosis frequently predisposes to tendon tear or rupture
Tendinosis treated primarily by rest and is likely to recur
Helpful Clues for Common Diagnoses
Tendons affected
US features
Helpful Clues for Less Common Diagnoses
Due to inflammation or infection
Tendons affected
Ulnar bursa extends from just proximal to just distal to carpal tunnel
Communicates with flexor digitorum tendon sheath in ~ 10% of normal subjects and radial bursa in ~ 5% of normal subjects
Ulnar bursal infection may also spread to space of Parona (potential space superficial to pronator quadratus muscle, which extends to midforearm)
Salient features
