title: Postpartum coccydynia: a case series study of 57 women.
abstract: BACKGROUND
  Although childbirth is a well-known cause of coccydynia, this condition has not been studied previously.
  
  
  OBJECTIVE
  To explore the characteristics of postpartum coccydynia and identify risk factors.
  
  
  METHODS
  A case series study.
  
  
  METHODS
  A specialist coccydynia clinic in a department of physical medicine in a university hospital.
  
  
  METHODS
  A series of 57 women suffering from postpartum coccydynia was analyzed and compared with a control group of 192 women suffering from coccydynia due to other causes. Dynamic radiography enabled a comparison of the coccygeal mobility in the two groups.
  
  
  RESULTS
  7.3% of the cases of coccydynia in female patients seen in our clinic were related to childbirth. The pain appeared as soon as the patient adopted the sitting position after delivery. The deliveries had often been performed with instruments (forceps deliveries: 50.8%; vacuum-assisted deliveries: 7.0%) or were spontaneous but described as "difficult" (12.3%). Luxation of the coccyx was observed in 43.9% of the cases and 17.0% of the controls. Fracture of the coccyx was involved in 5.3% of the cases. A body mass index >27 and ≥2 vaginal deliveries were associated with a higher prevalence of luxation of the coccyx.
  
  
  CONCLUSIONS
  Postpartum coccydynia is often associated with a difficult delivery, with the use of forceps in 50.8% of cases. Luxation and fracture of the coccyx are the two most characteristic lesions.
  
  
  CONCLUSIONS
  Our results bring a better knowledge and should allow a better management of this specific etiology of coccydynia.
authors: Physical Medicine Department, Hôtel-Dieu Hospital, Paris, France. jy.maigne@htd.aphp.fr
authors: J-Y
authors: JY
authors: Maigne
authors: F
authors: F
authors: Rusakiewicz
authors: M
authors: M
authors: Diouf
mesh_terms: D000328:Adult; D015992:Body Mass Index; D003050:Coccyx / Q000000981:diagnostic imaging / Q000293:injuries*; D036861:Delivery, Obstetric / Q000009:adverse effects; D005260:Female; D006801:Humans; D004204:Joint Dislocations / Q000150:complications* / Q000000981:diagnostic imaging / Q000453:epidemiology; D007593:Joint Instability / Q000150:complications* / Q000000981:diagnostic imaging / Q000453:epidemiology; D017116:Low Back Pain / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000209:etiology*; D008875:Middle Aged; D009017:Morbidity / Q000639:trends; D017699:Pelvic Pain / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000209:etiology*; D049590:Postpartum Period; D011247:Pregnancy; D011379:Prognosis; D011859:Radiography; D013122:Spinal Diseases / Q000150:complications* / Q000000981:diagnostic imaging / Q000453:epidemiology; D014620:Vacuum Extraction, Obstetrical / Q000009:adverse effects; D055815:Young Adult