title: Myositis ossificans in the paraspinal muscles of the neck after acupuncture: a case report.
abstract: BACKGROUND
  Although traumatic myositis ossificans (MO) has been reported occasionally, MO of paraspinal muscles has been rarely seen in the cervical spine after minor injury. This is difficult to distinguish from benign and malignant soft lesions in cases of a lack of definite trauma history.
  
  
  OBJECTIVE
  We report a case of MO in the cervical paraspinal muscle after acupuncture and describe methods for diagnosis and proper treatment, including classification, etiology, and radiologic and histologic features.
  
  
  METHODS
  Case report.
  
  
  METHODS
  A 26-year-old woman complained of posterior neck pain that had began 2 months earlier and neck swelling after acupuncture. No abnormal finding existed on the X-ray except soft tissue swelling. Magnetic resonance imaging was evaluated because of constant neck pain. To obtain more accurate assessment, computed tomography-guided biopsy was performed and a diagnosis of MO was made.
  
  
  RESULTS
  The patient was conservatively treated through rest and analgesics. Posterior neck pain and swelling improved for a several months. The hyperdensity was comparable with the bony density, and the size of the calcified lesion on X-ray diminished until the last follow-up.
  
  
  CONCLUSIONS
  Myositis ossificans that can occur after acupuncture should be recognized as a possible cause of persistent neck pain and swelling despite no definite trauma after thorough evaluation of the neoplasm and infection.
authors.affiliation: Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Gangnam-gu, Seoul, 135-710, Republic of Korea.
authors.forename: Dong-Geun
authors.initials: DG
authors.lastname: Lee
authors.forename: Sun-Ho
authors.initials: SH
authors.lastname: Lee
authors.forename: Sang-Won
authors.initials: SW
authors.lastname: Hwang
authors.forename: Eun-Sang
authors.initials: ES
authors.lastname: Kim
authors.forename: Whan
authors.initials: W
authors.lastname: Eoh
mesh_terms: D015670:Acupuncture Therapy / Q000009:adverse effects*; D000328:Adult; D005260:Female; D006801:Humans; D009221:Myositis Ossificans / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000209:etiology*; D009334:Neck Muscles / Q000000981:diagnostic imaging*; D019547:Neck Pain / Q000000981:diagnostic imaging / Q000209:etiology*; D064170:Paraspinal Muscles / Q000000981:diagnostic imaging*; D011859:Radiography
keywords: Acupuncture; Cervical spine; Myositis ossificans