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  • Title: Treatment challenges associated with bone echinococcosis.
    Author: Steinmetz S, Racloz G, Stern R, Dominguez D, Al-Mayahi M, Schibler M, Lew D, Hoffmeyer P, Uçkay I.
    Journal: J Antimicrob Chemother; 2014 Mar; 69(3):821-6. PubMed ID: 24222611.
    Abstract:
    OBJECTIVES: In this literature review, we concentrate on epidemiology and therapy of osseous echinococcosis, with an emphasis on the recurrence risk. METHODS: Literature review 1930-2012. RESULTS: We retrieved 200 publications based upon single case reports or case series, mostly from resource-poor settings. Among the 721 rural patients (22% females; median age 37 years), 60% of all reported cases were from the Mediterranean region and almost all patients were immune competent. Echinococcus granulosus was identified as the most frequent species. Most infections involved a single bone (602/721; 83%) and often the spine (321 cases; 45%). In eight cases (8/702; 1%), a secondary bacterial surgical site infection was reported. Surgical intervention was performed in 702 cases (97%), with single intervention in 687 episodes (95%). Complete excision of the lesion was possible in only 117 episodes (16%). Albendazole was by far the most frequently used agent in monotherapy with various dosages, while mebendazole in monotherapy was less frequent (32 cases). The median duration of antihelminthic therapy was 6 months (range 0.7-144 months). There were 124 recurrences (17%) after a median delay of 2 years (range 0.4-17 years). In multivariate analysis, the presence of visceral organ involvement increased the odds of recurrence by 5.4 (95% CI 3.1-9.4), whereas the number of surgical interventions, the duration of antihelminthic therapy or the use of hypertonic saline did not influence recurrence. CONCLUSIONS: Bone echinococcosis is a rare parasitic disease. While treatment modalities vary considerably, combined surgical and medical approaches are the standard of care with a 17% risk of recurrence.
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