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Nonthrombotic pulmonary embolism

I. Vinatier, E. Rivaud, C. Tcherakian, A. Bisson, B. Goudot, L. J. Couderc
European Respiratory Journal 2010 35: 224; DOI: 10.1183/09031936.00134109
I. Vinatier
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E. Rivaud
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C. Tcherakian
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A. Bisson
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B. Goudot
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L. J. Couderc
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To the Editors:

We read with great interest the article in the European Respiratory Journal by Jorens et al. 1 on the different types of nonthrombotic pulmonary embolism. Among them, hydatid disease is of major importance as it is endemic in sheep-raising regions worldwide. We wish, therefore, to outline the management of metastatic pulmonary hydatidosis secondary to a primary hydatid cyst located in the liver according to our experience of six cases.

First, the diagnosis of hydatid pulmonary vascular obstruction should be looked for systematically in patients with a primary hepatic hydatid cyst located near the inferior vena cava and/or supra-hepatic veins, by perfusion lung scan and/or spiral thoracic computed tomography.

Secondly, once the pulmonary vascular obstruction has been diagnosed, the surgical treatment of the hepatic cyst at the origin of the embolism must be carried out as the first step. However, mobilisation of the liver may cause hydatid embolism and haemorrhagic complications when the hydatid cysts are in contact with the walls of the inferior vena cava. We suggest the following preventive measures: a wide laparotomy to control the inferior vena cava and have an extracorporeal bypass ready. These guidelines may prevent the fatal intraoperative pulmonary embolism as previously reported, and which occurred in two patients from our series 2.

Thirdly, surgery for a hydatid pulmonary vascular obstruction is quite similar to that for usual pulmonary embolism: embolectomy by arteriotomy for proximal pulmonary intra vascular hydatid cysts (five times in four patients in our series) using cardiopulmonary bypass in two cases.

Finally, chronic pulmonary arterial hypertension may worsen even after hydatid embolectomy as the vascular obstruction is also distal and associated with a granulomatous reaction and vascular fibrosis 3. Pulmonary transplantation may be a therapeutic option because immunosuppressive treatment does not adversely affect the course of hydatid disease 4. Recently, the use of pulmonary hypertension medical therapy, such as endothelin-1-receptor antagonists, phosphodiesterase-5-inhibitors and prostacyclin analogues, has been reported to be clinically effective 5.

Statement of interest

None declared.

    • © ERS Journals Ltd

    References

    1. ↵
      Jorens PG, Van Marck E, Snoeckx A, et al. Nonthrombotic pulmonary embolism. Eur Respir J 2009;34:452–474.
      OpenUrlAbstract/FREE Full Text
    2. ↵
      Rothlin MA. Fatal intraoperative pulmonary embolism from a hepatic hydatid cyst. Am J Gastroenterol 1998;93:2606–2607.
      OpenUrlPubMedWeb of Science
    3. ↵
      Deve F. Ecchinococcose pulmonaire metastatique. In: Ecchinococcose secondaire. Paris, Masson, 1946; pp. 145–178
    4. ↵
      Sobrino JM, Pulpon LA, Crespo MG, et al. Heart transplantation in a patient with liver hydatidosis. J Heart Lung Transplant 1993;12:531–533.
      OpenUrlPubMedWeb of Science
    5. ↵
      Bulman W, Coyle CM, Brentjens TE, et al. Severe pulmonary hypertension due to chronic echinococcal pulmonary emboli treated with targeted pulmonary vascular therapy and hepatic resection. Chest 2007;132:1356–1358.
      OpenUrlCrossRefPubMedWeb of Science
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    Nonthrombotic pulmonary embolism
    I. Vinatier, E. Rivaud, C. Tcherakian, A. Bisson, B. Goudot, L. J. Couderc
    European Respiratory Journal Jan 2010, 35 (1) 224; DOI: 10.1183/09031936.00134109

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    Nonthrombotic pulmonary embolism
    I. Vinatier, E. Rivaud, C. Tcherakian, A. Bisson, B. Goudot, L. J. Couderc
    European Respiratory Journal Jan 2010, 35 (1) 224; DOI: 10.1183/09031936.00134109
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