Orthopedic and Trauma Findings by Andreas Roth

Author:Andreas Roth
Language: eng
Format: epub
Publisher: Springer Berlin Heidelberg, Berlin, Heidelberg

Tendon Dislocation

Dislocation of the tendon located over the metacarpal bone, by tearing of the fibrous cap of the extension muscle in an ulnar direction. Rare. Etiology: spontaneous or after light trauma, especially in chronic polyarthritis caused by penetrating articulo-synovitis.

History: determined by the underlying rheumatic disorder.

Examination: ulnar deviation of the fingers (preexisting) and an extension deficit.

Ganglion Cyst

Belongs to the tumorlike lesions of the soft tissue. Most common subcutaneous tumorlike change. Connected to the joint capsule or tendon sheath located beneath the cyst. Cystic structure containing a clear, viscous fluid (mucin, consisting largely of hyaluronic acid). Mostly dorsal to the lunate bone. Etiology: unclear. Develops from the synovial membrane of the joint capsule toward the ligaments. Occurs after excessive loading and flexion.

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