title: [Lipoatrophia semicircularis--an orthopedic diagnosis?].
abstract: BACKGROUND
  Lipoatrophia semicircularis (LAS) represents an isolated fatty atrophy usually located at the lower extremity. The atrophy is circular and painless and usually resolves without therapy. The skin modifications occur within a few days or weeks. The etiology is unknown.
  
  
  METHODS
  In the following we present a case of LAS with a segmental dysfunction of the third ipsilateral lumbal root of a 43-year-old women. It was possible to provoke a referred pain into the area of atrophy by passive motion of the lumbal spine into the plane of resistant.
  
  
  CONCLUSIONS
  LAS is rare and slightly known among orthopedists. Knowledge of the typical morphological modifications will lead to diagnosis. In most of the cases further diagnostic measures are not necessary. We recommend a segmental investigation of the spine in the case of secured diagnosis.
authors.affiliation: Klinik und Poliklinik f. Orthopädie Universität Bonn.
authors.forename: J
authors.initials: J
authors.lastname: Cossmann
authors.forename: U A
authors.initials: UA
authors.lastname: Wagner
authors.forename: O
authors.initials: O
authors.lastname: Schmitt
mesh_terms: D000273:Adipose Tissue / Q000473:pathology; D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008060:Lipodystrophy / Q000175:diagnosis / Q000209:etiology*; D008159:Lumbar Vertebrae; D008279:Magnetic Resonance Imaging; D010147:Pain Measurement; D013122:Spinal Diseases / Q000150:complications / Q000175:diagnosis*; D013848:Thigh / Q000294:innervation / Q000473:pathology