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Noninvasive diagnosis of bronchiolitis obliterans due to sulfur mustard exposure: could high-resolution computed tomography give us a clue?

Diagnosi non-invasiva di bronchiolite obliterante dovuta alla esposizione a mostarde azotate (iprite): può la tomografia computerizzata ad alta risoluzione fornire una soluzione?

  • Chest Radiology/Radiologia Toracica
  • Published:
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Abstract

Purpose

Previous pathological investigations have reported bronchiolitis obliterans (BO) as the major long-term sequela of exposure to sulfur mustard. In this study, we investigated whether high-resolution computed tomography (HRCT) could be used as a noninvasive imaging modality to differentiate between mustard lung (as a subtype of BO) and other respiratory disorders.

Materials and methods

Three groups of patients with sulfur-mustard-induced lung injury (BO), severe chronic asthma (resistant asthma) and smoking habit, respectively, were recruited. Also 30 nonsmoking participants were recruited randomly as the control group. Pulmonary function tests (PFT) and HRCT were performed. Images were viewed with a window level of −450 and window width of 1,400 HU. All images were evaluated by an expert radiologist who was blinded regarding the patients’ diagnoses and clinical situations.

Results

Airway involvement was higher and more frequent than parenchymal involvement in the groups with chemical-induced injury and asthma in comparison with smokers. On the other hand, parenchymal involvement was more frequent than airway involvement in the smokers’ group in comparison with the other groups.

Conclusions

HRCT can be a very useful method for differentiating between mustard lung, resistant asthma and lung injuries due to cigarette smoking.

Abstract

Obiettivo

Numerosi precedenti studi di anatomia patologica hanno dimostrato come la bronchiolite obliterante (BO) sia la conseguenza a lungo termine più frequente all’esposizione alle mostarde azotate (iprite). In questo studio abbiamo valutato se la tomografia computerizzata ad alta risoluzione (HRCT) possa essere impiegata come modalità di imaging non invasivo per la diagnosi differenziale tra il danno polmonare indotto da mostarde azotate (sottotipo di BO) ed altre patologie respiratorie.

Materiali e metodi

Sono stati reclutati tre gruppi di pazienti, rispettivamente affetti da bronchiolite obliterante indotta da mostarde azotate (BO), affetti da asma cronica (asma refrattaria) e fumatori. Sono stati scelti casualmente ulteriori 30 soggetti non fumatori come gruppo di controllo.Tutti i pazienti sono stati tutti sottoposti a test di funzionalità respiratoria (PFT) e HRCT. Le immagini sono state visualizzate con un livello di finestra di −450 UH ed un’ampiezza di finestra di 1,400 UH. Tutte le immagini sono state visionate da un radiologo esperto all’insaputa della diagnosi e della situazione clinica dei pazienti.

Risultati

Il coinvolgimento delle vie aeree è risultato maggiore e più frequente del coinvolgimento parenchimale nei gruppi di pazienti con danno polmonare chimicamente indotto e asmatici rispetto ai fumatori. D’altra parte il coinvolgimento parenchimale è risultato più frequente del coinvolgimento delle vie aeree nel gruppo di fumatori rispetto agli altri gruppi.

Conclusioni

L’ HRCT risulta essere un metodo utile per la diagnosi differenziale tra il danno polmonare da mostarde azotate, l’asma refrattaria ed il danno polmonare indotto dal fumo.

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Correspondence to M. Ghanei.

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Ghanei, M., Ghayumi, M., Ahakzani, N. et al. Noninvasive diagnosis of bronchiolitis obliterans due to sulfur mustard exposure: could high-resolution computed tomography give us a clue?. Radiol med 115, 413–420 (2010). https://doi.org/10.1007/s11547-010-0503-6

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  • DOI: https://doi.org/10.1007/s11547-010-0503-6

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