title: Anterior superior iliac spine avulsion fracture presenting as meralgia paraesthetica in an adolescent sprinter.
abstract: OBJECTIVE
  We report here a rare case of anterior superior iliac spine avulsion fracture that presented initially as meralgia paraesthetica.
  
  
  METHODS
  A 14-year-old male sprinter presented with anterior superior iliac spine avulsion fracture, which was not observed on initial plain radiograph of the hip, but was diagnosed by ultrasound. Both clinical presentations and electrophysiological studies indicated meralgia paraesthetica. The lateral femoral cutaneous nerve of the thigh was probably compressed by an inguinal haematoma resulting from sartorius muscle strain, which was detected on musculoskeletal ultrasound. Computed tomography of the pelvis confirmed anterior superior iliac spine avulsion fracture.
  
  
  CONCLUSIONS
  Meralgia paraesthetica in adolescents can be due to anterior superior iliac spine avulsion fracture. Sonography is a valuable tool for screening for muscular haematoma and occult fractures, which may allow clinicians to diagnose the nature of the muscle injury, and thus guide the most appropriate therapeutic strategy.
authors.affiliation: Department of Physical Medicine and Rehabilitation, Ten-Chan General Hospital, 320 Taoyuan County, Taiwan, R.O.C.. f927kimo@gmail.com.
authors.forename: Chia-Yu
authors.initials: CY
authors.lastname: Hsu
authors.forename: Chu-Ming
authors.initials: CM
authors.lastname: Wu
authors.forename: Shih-Wei
authors.initials: SW
authors.lastname: Lin
authors.forename: Kui-Lin
authors.initials: KL
authors.lastname: Cheng
mesh_terms: D000293:Adolescent; D001265:Athletic Injuries / Q000175:diagnosis* / Q000534:rehabilitation; D003937:Diagnosis, Differential; D020428:Femoral Neuropathy; D050723:Fractures, Bone / Q000175:diagnosis* / Q000534:rehabilitation; D006801:Humans; D007085:Ilium / Q000000981:diagnostic imaging / Q000293:injuries*; D008297:Male; D009408:Nerve Compression Syndromes / Q000175:diagnosis*; D011859:Radiography; D012420:Running / Q000293:injuries*; D014463:Ultrasonography