title: Unusual Cases of Hypothenar Hammer Syndrome.
abstract: OBJECTIVE
  Hypothenar hammer syndrome (HHS) is a rare occupational disease. The risk group of HHS is patient whose dominate hand used as a hammer. Our study report unusually cases in Chiang Mai University Hospital.
  
  
  RESULTS
  19 year-old basketball player had right ulnar artery aneurysm for two months. After operation, his symptom was relieved and returned to play basketball again. 65 year-old housekeeper had non-dominated hand ulnar artery aneurysm for two years. After operation she still had hand claudication due to poor run-off vessel.
  
  
  CONCLUSIONS
  HHS is previously state in risk group. But from our report there was a risk in different occupation.
authors.affiliation: Division of Vascular and Endovascular Surgery, Department of Surgery, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
authors.forename: Saranat
authors.initials: S
authors.lastname: Orrapin
authors.affiliation: Division of Vascular and Endovascular Surgery, Department of Surgery, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
authors.forename: Supapong
authors.initials: S
authors.lastname: Arworn
authors.affiliation: Department of Family Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
authors.forename: Anawat
authors.initials: A
authors.lastname: Wisetborisut
keywords: hypothenar hammer syndrome; ulnar artery aneurysm