title: Bilateral femoral neck fractures secondary to chronic carbamazepine use treated by bilateral dynamic hip screw: A case report.
abstract: BACKGROUND
  Bilateral femoral neck fractures without major trauma are rare and related to several conditions. Insufficiency fractures due to the use of anti-epileptic drug are one of the rare causes. This case study is about bilateral femoral neck insufficiency fractures resulting from chronic use of anti-epileptic drug.
  
  
  METHODS
  A 26-year-old woman was referred to our emergency department with a complaint of bilateral groin pain and a 12-year history of irregular carbamazepine use. The diagnosis was bilateral femoral neck insufficiency fractures due to irregular long-term carbamazepine use. One-stage bilateral dynamic hip screw osteosynthesis was performed. After 2 years of follow up, good result was obtained.
  
  
  CONCLUSIONS
  There are several risk factors for insufficiency fracture, and antiepileptic drug related osteoporosis is one of the reason. These drugs have negative effect on bone methabolism and bone mineral density.
  
  
  CONCLUSIONS
  To our knowledge, this is the first case in the literature of bilateral femoral neck insufficiency fracture due to chronic carbamazepine use. Joint and bone pain with a history of long-term use of anti-epileptic drug should be investigated carefully, and insufficiency fractures should be kept in mind.
authors.affiliation: Department of Orthopedics and Traumatology, Acibadem Atakent Hospital, Istanbul, Turkey. Electronic address: ksariyilmaz@gmail.com.
authors.forename: Kerim
authors.initials: K
authors.lastname: Sariyilmaz
authors.affiliation: Department of Orthopedics and Traumatology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey. Electronic address: barisgulenc@yahoo.com.
authors.forename: Baris
authors.initials: B
authors.lastname: Gulenc
authors.affiliation: Department of Orthopedics and Traumatology, Acibadem Atakent Hospital, Istanbul, Turkey. Electronic address: drdeto@gmail.com.
authors.forename: Okan
authors.initials: O
authors.lastname: Ozkunt
authors.affiliation: Department of Orthopedics and Traumatology, Acibadem Atakent Hospital, Istanbul, Turkey. Electronic address: fatihdikici71@hotmail.com.
authors.forename: Fatih
authors.initials: F
authors.lastname: Dikici
authors.affiliation: Department of Orthopedics and Traumatology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey.
authors.forename: Onder
authors.initials: O
authors.lastname: Yazicioglu
keywords: Antiepileptic drug; Bilateral femoral neck fracture; Carbamazepine; Dynamic hip screw; Insufficiency fractures