Two cases of plant thorn synovitis. Difficulties in diagnosis and treatment

J Rheumatol. 1990 Feb;17(2):252-4.


Two patients with inflammatory monoarthritis of the knee due to joint penetration by plant thorns are reported. Histopathology demonstrated granulomatous synovitis in both and visualized fragments of black thorn. Synovectomy was partly effective. Awareness of this cause of chronic monoarthritis will avoid delay in diagnosis and treatment.

Publication types

  • Case Reports

MeSH terms

  • Adult
  • Arthritis / etiology
  • Female
  • Foreign Bodies / complications*
  • Foreign-Body Reaction / etiology*
  • Humans
  • Knee Joint*
  • Male
  • Plants*
  • Recurrence
  • Synovitis / diagnosis
  • Synovitis / etiology*
  • Synovitis / therapy