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Additionally, swan-neck deformity can be caused by weakening or tearing of the ligament and tendon on the middle joint of a finger. [10] Other causes of swan-neck deformity include untreated mallet finger, muscle spasticity, physical hand trauma, and many others. [11]
Pain, swelling, bluish discoloration Paroxysmal hand hematoma , also known as Achenbach syndrome , is a skin condition characterized by spontaneous focal hemorrhage into the palm or the volar surface of a finger, which results in transitory localized pain, followed by rapid swelling and localized blueish discoloration .
Dactylitis, or "sausage digit", a diffuse swelling of a solitary finger or toe, is a distinctive feature of reactive arthritis and other peripheral spondylarthritides but can also be seen in polyarticular gout and sarcoidosis. Mucocutaneous lesions can be present. Common findings include oral ulcers that come and go.
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Infectious tenosynovitis in 2.5% to 9.4% of all hand infections. Kanavel's cardinal signs are used to diagnose infectious tenosynovitis. They are: tenderness to touch along the flexor aspect of the finger, fusiform enlargement of the affected finger, the finger being held in slight flexion at rest, and severe pain with passive extension.
Ulnar deviation, also known as ulnar drift, is a hand deformity in which the swelling of the metacarpophalangeal joints (the big knuckles at the base of the fingers) causes the fingers to become displaced, tending towards the little finger. [1]
Trigger finger is a common disorder which occurs when the sheath through which tendons pass, become swollen or irritated. Initially, the finger may catch during movement but symptoms like pain, swelling and a snap may occur with time. The finger often gets locked in one position and it may be difficult to straighten or bend the finger.
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