Cactus thorn arthritis: Case report and review of the literature

Synovitis secondary to penetrating plant thorn injuries is an infrequently reported event. Despite its wide geographic distribution, thorns from the p rickly pear cactus (Optunia ficusindica) an a rare source of this type of i nflammatory arthritis. We hereby present an unusual case of an individual w ho developed an acute monoarthritis of the knee shortly after sustaining a penetrating cactus them injury. The clinical and pathophysiologic features of cactus thorn arthritis are reviewed and the unusual features present in this individual are highlighted. Treatment options, with an emphasis on rap id diagnosis and therapeutic interventions, are discussed. Increased physic ian awareness and recognition of this unusual but not rare entity are essen tial as a means of improving clinical outcome.