Preliminary Evaluation of Percutaneous Treatment of Echinococcal Cysts without Injection of Scolicidal Agent

Giovanni Firpo WHO-Collaborating Centre for Clinical Management of Cystic Echinococcosis, Pavia, Italy;

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Ambra Vola WHO-Collaborating Centre for Clinical Management of Cystic Echinococcosis, Pavia, Italy;
Division of Infectious Tropical Diseases, San Matteo Hospital Foundation, Pavia, Italy;

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Raffaella Lissandrin WHO-Collaborating Centre for Clinical Management of Cystic Echinococcosis, Pavia, Italy;
Division of Infectious Tropical Diseases, San Matteo Hospital Foundation, Pavia, Italy;

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Francesca Tamarozzi WHO-Collaborating Centre for Clinical Management of Cystic Echinococcosis, Pavia, Italy;
Department of Clinical, Surgical, Diagnostic and Paediatric Sciences, University of Pavia, Pavia, Italy

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Enrico Brunetti WHO-Collaborating Centre for Clinical Management of Cystic Echinococcosis, Pavia, Italy;
Division of Infectious Tropical Diseases, San Matteo Hospital Foundation, Pavia, Italy;
Department of Clinical, Surgical, Diagnostic and Paediatric Sciences, University of Pavia, Pavia, Italy

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Puncture, Aspiration, Injection of scolicidal agent, Re-aspiration is the most widely used percutaneous treatment of cystic echinococcosis (CE). Among its perceived risks is chemical sclerosing cholangitis, a serious complication due to the caustic effect of the scolicidal solution on the biliary tree, when a patent cystobiliary fistula occurs. To simplify the protocol, we decided to omit injection and reaspiration of the scolicidal agent and to implement a full course of albendazole (ABZ) therapy instead of the routine 1-month ABZ prophylaxis. We searched our databases for patients with CL (Cystic Lesion, suspected for CE), CE1, and CE3a cysts treated between October 2007 and January 2017 with percutaneous aspiration followed by at least 1 month of oral ABZ and with an ultrasound follow-up of at least 6 months. Fifteen patients matched our inclusion criteria. Follow-up ranged from 7 to 75 months. The oral ABZ course after the aspiration procedure ranged from 1 to 18 months. Eleven subjects (73.3%) had undergone a course of ABZ before the percutaneous procedure (min 15 days, max 16 months). Ten cysts (62.5%) had reached solidification (stage CE4) in 3 to 69 months. Four other cysts (26.7%) remained stable in stage CE3a, whereas two cysts (13.3%) reactivated to stage CE3b. Procedural perioperative complications occurred in 13.3% of patients, whereas complications during the follow-up occurred in 20% of patients. These proof-of-concept preliminary results are overall comparable with those reported in the literature for other percutaneous treatments, both in terms of response rate, relapse rate, and morbidity.

Author Notes

Address correspondence to Francesca Tamarozzi, Center for Tropical Diseases, Sacro Cuore Hospital, Don A Sempreboni 5, 37024 Negrar, Verona, Italy and WHO Collaborating Center for Clinical management of Cystic Echinococcosis, Via Taramelli 5, 27100 Pavia, Italy. E-mail: f_tamarozzi@yahoo.com

Financial support: This study was funded through the European Union Seventh Framework Programme (FP7/2007–2013) under the project HERACLES, grant agreement no. [602051].

Authors’ addresses: Giovanni Firpo, WHO-Collaborating Centre for Clinical Management of Cystic Echinococcosis, Pavia, Italy, E-mail: giovanni.firpo01@universitadipavia.it. Ambra Vola and Raffaella Lissandrin, WHO-Collaborating Centre for Clinical Management of Cystic Echinococcosis, Pavia, Italy, and Division of Infectious Tropical Diseases, San Matteo Hospital Foundation, Pavia, Italy, E-mails: ambra.vola@gmail.com and raffaella.lissandrin@unipv.it. Francesca Tamarozzi, Center for Tropical Diseases, Sacro Cuore Hospital, Negrar, verona, Italy, and WHO Collaborating Center for Clinical Management of Cystic Echinococcosis, Pavia, Italy, E-mail: f_tamarozzi@yahoo.com. Enrico Brunetti, WHO-Collaborating Centre for Clinical Management of Cystic Echinococcosis, Pavia, Italy, Division of Infectious Tropical Diseases, San Matteo Hospital Foundation, Pavia, Italy, and Department of Clinical, Surgical, Diagnostic and Paediatric Science, University of Pavia, Pavia, Italy, E-mail: enrico.brunetti@unipv.it.

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