title: Thickening of finger extensor tendons in affected hands among patients with stroke: prevalence and sonographic features.
abstract: OBJECTIVE
  To evaluate the prevalence and sonographic characteristics of thickened finger extensor tendons in affected hands of patients with stroke.
  
  
  METHODS
  Observational survey.
  
  
  METHODS
  Thirty-six patients (12 women, 24 men) admitted for rehabilitation because of stroke.
  
  
  METHODS
  30 right-handed healthy volunteers.
  
  
  METHODS
  We used an 8-16 or a 6-12 MHz sonographic transducer to measure tendon thickness of the extensor digitorum communis of the middle (EDCiii) and ring (EDCiv) fingers at the wrist level.
  
  
  RESULTS
  The thickness of EDCiii (1.79 mm, standard deviation (SD) 0.56) and EDCiv (2.31 mm, SD 0.63) tendons of affected hands were significantly greater than those of the contralateral hands (EDCiii: 1.31 mm (SD 0.23), EDCiv: 1.59 mm (SD 0.46), p < 0.0001). When the upper limits of side-to-side tendon thickness differences were set at mean value plus 3 times SD among healthy volunteers (EDCiii: 0.60 mm, EDCiv: 0.74 mm), 18 (50%) patients and no volunteers had tendon thickening. No clinical features other than hand weakness correlated with tendon thickening.
  
  
  CONCLUSIONS
  Thickening of finger extensor tendons of the affected hands is common among stroke patients. It should be considered in the differential diagnosis of swelling of the dorsal wrists and hands in stroke-affected upper limbs.
authors.affiliation: Department of Physical Medicine and Rehabilitation, China Medical University Hospital, Taichung City, Taiwan.
authors.forename: Nai-Hsin
authors.initials: NH
authors.lastname: Meng
authors.forename: Li-Wei
authors.initials: LW
authors.lastname: Chou
authors.forename: Pei-Yu
authors.initials: PY
authors.lastname: Yang
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D004487:Edema / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000209:etiology; D005260:Female; D005385:Fingers / Q000000981:diagnostic imaging*; D006225:Hand / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D020521:Stroke / Q000150:complications / Q000000981:diagnostic imaging*; D000071939:Stroke Rehabilitation; D013710:Tendons / Q000000981:diagnostic imaging*; D014463:Ultrasonography