Measurement of Nitric Oxide in the Differential Diagnosis of Lymphocytic Pleural Effusion

림프구성 흉막염의 감별 진단에서 NO(nitric oxide)의 측정

  • Kim, Tae-Hyung (Department of internal medicine, Hanyang University college of medicine) ;
  • Sohn, Jang Won (Department of internal medicine, Hanyang University college of medicine) ;
  • Yoon, Ho Joo (Department of internal medicine, Hanyang University college of medicine) ;
  • Shin, Dong Ho (Department of internal medicine, Hanyang University college of medicine) ;
  • Park, Sung Soo (Department of internal medicine, Hanyang University college of medicine)
  • 김태형 (한양대학교 의과대학 내과학교실) ;
  • 손장원 (한양대학교 의과대학 내과학교실) ;
  • 윤호주 (한양대학교 의과대학 내과학교실) ;
  • 신동호 (한양대학교 의과대학 내과학교실) ;
  • 박성수 (한양대학교 의과대학 내과학교실)
  • Received : 2005.07.28
  • Accepted : 2005.09.08
  • Published : 2005.10.30

Abstract

Background : Differential diagnosis of lymphocytic pleural effusion is difficult even with many laboratory findings. Nitric oxide(NO) level is higher in the sputum or exhaled breath of patients with active pulmonary tuberculosis than in those without tuberculosis. In addition, there are some reports about the increased level of NO metabolites in body fluids of cancer patients. However, there is no data on the NO levels in the pleural fluid of patients with tuberculous pleurisy. Method : The serum and pleural fluid NO in the patients with acute lymphocytic pleural effusion were analyzed. Results : Of total 27 patients, there were 14 males and average age of patients was 48 years. The final diagnosis was tuberculous pleurisy in 17 cases and malignant pleural effusion in 10. The pleural fluid NO level was $540.1{\pm}116.4{\mu}mol$ in the tuberculous pleurisy patients and $383.7{\pm}71.0{\mu}mol$ in the malignant pleural effusion patients. The serum NO level was $624.7{\pm}142.0{\mu}mol$ in tuberculous pleurisy patients and $394.4{\pm}90.4{\mu}mol$ in malignant pleural effusion patients. There was no significant difference in the serum and pleural fluid NO level between the two groups. The NO level in the pleural fluid showed a significant correlations with the pleural fluid neutrophil count, the pleural fluid/serum protein ratio, and pleural fluid/serum albumin ratio (p<0.05 in each). The protein concentration, leukocyte and lymphocyte count in the pleural fluid were significantly higher in the tuberculous pleurisy patients than the malignant pleural effusion patients (p<0.05 in each). Conclusion : NO is not a suitable marker for a differential diagnosis of lymphocytic pleural effusion. However, the NO level in the pleural fluid might be associated with the neutrophil recruitment and protein leakage in the pleural space.

배 경 : 림프구성 흉막염의 감별 진단은 매우 중요하나, 적절한 검사 후에도 감별이 되지 않는 예가 있다. NO는 급성 염증반응 시 혈청, 객담, 호기 응축액 등에서 증가하는 것으로 알려져 있으며, 활동성 폐결핵 환자의 객담 및 호기에서도 증가하고 적절한 치료 후 감소하는 것으로 보고된 바 있어, 결핵성 흉막염에서도 증가 할 가능성이 있으나, 결핵성 흉막염에서 NO에 대해서는 연구된 바가 없다. 이에 림프구성 흉막염 중 결핵성 흉막염의 감별진단에 있어서 NO의 유용성에 대해 알아보고자 하였다. 대상 및 방법 : 2004년 4월부터 2005년 4월까지 한양대 구리병원에 급성 흉막염으로 입원하여 흉수 검사 결과 림프구성 흉막염 소견을 보였던 환자를 대상으로 흉수 및 혈청 NO를 측정하였으며, 대상 환자는 27명으로, 남:여 각각 14:13명이었고, 평균 연령은 48세였다. 최종진단은 결핵성 흉막염 17명, 악성 흉수 10명이었다. 결 과 : 흉수 NO는 결핵성 흉막염 $540.1{\pm}116.4{\mu}mol$, 악성흉수 $383.7{\pm}71.0{\mu}mol$이며, 혈청 NO는 결핵성 흉막염 $624.7{\pm}142.0{\mu}mol$, 악성 흉수 $394.4{\pm}90.4{\mu}mol$이었고, 각 군에서 통계학적으로 유의한 차이를 보이지 않았다. 또한, 흉수 NO는 흉수 호중구수, 흉수/혈청 단백질비, 흉수/혈청 알부민비와 유의한 상관관계를 보였다(p<0.05). 결핵성 흉막염군과 악성 흉수막염군의 비교에서 흉수 단백질양, 흉수 백혈구 수 및 림프구수는 결핵성 흉막염에서 유의하게 높았다(각 p<0.05). 결 론 : NO는 림프구성 흉막염의 감별 진단에 있어서는 유용성이 적으며, 흉수 NO는 흉강 내 호중구의 모집 및 단백 누출과 관련될 가능성이 있으나, 추후 다수를 대상으로 한 연구가 필요하겠다.

Keywords

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