title: Chronic expanding hematoma in the stumps of persons following transfemoral amputation: A report of two cases.
abstract: BACKGROUND
  Two persons presented with severe stump pain following transfemoral amputation.
  
  
  METHODS
  A 21-year-old female and a 31-year-old male with transfemoral amputation were ambulatory with prostheses and suffered from severe stump pain caused by the presence of masses around the tip of the bone stump. From the clinical courses, imaging studies, and the intraoperative findings, the masses were diagnosed as a relatively rare condition known as chronic expanding hematoma.
  
  
  RESULTS
  The two patients were treated successfully with surgical resection. The hematomas were soft cystic masses with a thick capsule containing old blood clots and serous fluid. There were no pathological signs of malignancy. After surgical treatment, the patients achieved walking without stump pain.
  
  
  CONCLUSIONS
  Although chronic expanding hematoma is a rare condition, it should be considered as a possible cause of stump pain.
  
  
  CONCLUSIONS
  Stump pain is caused by many conditions. Although chronic expanding hematoma is a rare condition, it should be considered as a possible cause of stump pain.
authors.affiliation: Department of Rehabilitation Medicine, Yokohama City University, Yokohama, Japan Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, Japan takakura.tomokazu@abmes.twmu.ac.jp.
authors.forename: Tomokazu
authors.initials: T
authors.lastname: Takakura
authors.affiliation: Department of Plastic and Reconstructive Surgery, Fujisawa Shounandai Hospital, Fujisawa, Japan.
authors.forename: Taro
authors.initials: T
authors.lastname: Mikami
authors.affiliation: Department of Rehabilitation Medicine, Yokohama City University, Yokohama, Japan.
authors.forename: Yasuko
authors.initials: Y
authors.lastname: Nishioka
authors.affiliation: Department of Rehabilitation Medicine, Yokohama City University, Yokohama, Japan.
authors.forename: Akinobu
authors.initials: A
authors.lastname: Nemoto
authors.affiliation: Department of Rehabilitation Medicine, Yokohama City University, Yokohama, Japan.
authors.forename: Kazuya
authors.initials: K
authors.lastname: Mizuochi
mesh_terms: D000328:Adult; D000671:Amputation, Surgical; D000672:Amputation Stumps; D000674:Amputees; D001186:Artificial Limbs; D002908:Chronic Disease; D005260:Female; D006406:Hematoma / Q000150:complications* / Q000601:surgery; D006801:Humans; D007866:Leg / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008297:Male; D009999:Ossification, Heterotopic / Q000209:etiology; D010149:Postoperative Pain / Q000209:etiology*; D055815:Young Adult
keywords: Amputation stumps; hematoma