title: [Thorn synovitis: Report of 2 cases].
abstract: BACKGROUND
  Thorn synovitis is related to plant or animal thorn punctures. We report two cases of thorn synovitis.
  
  
  METHODS
  The first patient was a 41-year-old-woman who presented with recurrent arthritis of the right knee after needle fish injury. The immunological tests and cultures were negative. X-rays and MRI showed the foreign bodies in the soft parts on the outer side of the knee. An arthroscopy was performed and the thorn removed. Clinical outcome was favourable with complete symptoms resolution. The second patient was a 58-year-old-man, with a family history of spondylarthritis, who was admitted with a monoarthritis of the left wrist that occurred 10 weeks after palm tree thorn injury. Patient received unsuccessfully antibiotics and anti-inflammatory drugs. Immunological tests and cultures were negative. Wrist ultrasound showed erosive synovitis. Intra-articular lesion removal by arthroscopy allowed favourable outcome.
  
  
  CONCLUSIONS
  Thorn synovitis diagnosis is based on the discovery of a foreign body. Treatment is based on their removal. Suspicion of infection with deficient pathogen, especially Pantoea agglomerans, remains difficult for the practitioner.
authors: Service de rhumatologie, hôpital Henri-Mondor, 51, avenue du Maréchal-de-Lattre-de-Tassigny, 94100 Créteil, France.
authors: E
authors: E
authors: Fianyo
authors: Service de rhumatologie, hôpital Henri-Mondor, 51, avenue du Maréchal-de-Lattre-de-Tassigny, 94100 Créteil, France. Electronic address: sandra.guignard@hmn.aphp.fr.
authors: S
authors: S
authors: Guignard
authors: Service de rhumatologie, hôpital Henri-Mondor, 51, avenue du Maréchal-de-Lattre-de-Tassigny, 94100 Créteil, France.
authors: A
authors: A
authors: Economu
authors: Service de rhumatologie, hôpital Henri-Mondor, 51, avenue du Maréchal-de-Lattre-de-Tassigny, 94100 Créteil, France.
authors: N
authors: N
authors: Thellier
authors: Service de rhumatologie, hôpital Henri-Mondor, 51, avenue du Maréchal-de-Lattre-de-Tassigny, 94100 Créteil, France.
authors: K
authors: K
authors: Davidowicz
authors: Service de rhumatologie, hôpital Henri-Mondor, 51, avenue du Maréchal-de-Lattre-de-Tassigny, 94100 Créteil, France.
authors: X
authors: X
authors: Chevalier
mesh_terms: D000328:Adult; D001182:Arthroscopy; D005260:Female; D005547:Foreign Bodies / Q000150:complications / Q000175:diagnosis* / Q000628:therapy; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010944:Plants; D013585:Synovitis / Q000175:diagnosis / Q000209:etiology* / Q000628:therapy
keywords: Aiguille de mer; Corps étranger; Foreign body; Needle fish; Palm; Palmier; Synovites à piquants; Thorn synovitis