Journal List > Korean J Gastroenterol > v.58(1) > 1006900

Kang, Kim, Jeon, Choi, Jeong, Jang, Lee, and Uh: Interstitial Pneumonitis in a Patient with Chronic Hepatitis C and Chronic Renal Failure on Interferon Therapy

Abstract

After 4-months of alpha interferon (IFN-α), a 64-year old woman with chronic hepatitis C developed a cough and dyspnea and showed diffuse infiltrative opacities on her chest X-ray. Her symptoms persisted after stopping the IFN-α therapy. Pulmonary function testing revealed a reduced forced vital capacity. High-resolution computed tomography of the lung showed peripheral and peribronchovascular ground glass attenuation and consolidation associated with reticulation. Bronchoalveolar lavage was performed for further evaluation and showed a lymphocyte level of 8.2%, an uncommon finding in IFN-α-induced interstitial pneumonitis. We performed a lung biopsy to diagnose her disease and it suggested interstitial pneumonitis. This was considered to be due to the immunomodulatory effects of INF-α. Although rare, any sign of significant pulmonary involvement should be evaluated.

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Fig. 1.
(A, B) CT on admission showing peripheral and peribronchovascular ground glass attenuation and consolidations. (C, D) Repeated CT scan performed after discontinuation of interferon. Bilateral lung parenchymal lesions show improvement.
kjg-58-47f1.tif
Fig. 2.
(A) Patchy areas of organizing pneumonia showing polypoid plugs of loose connective tissue (H&E, ×40). (B) Polypoid plugs of organizing pneumonia and acute alveolar hemorrhage (H&E, ×40). (C) An organizing intraluminal plug with chronic inflammatory infiltrate (H&E, ×100).(D) Chronic interstitial pneumonia pattern with interstitial fibrosis and inflammation (H&E, ×40).
kjg-58-47f2.tif
Table 1.
The Cases of Interferon-induced Pulmonary Complications
No. FEV1 (L) (% Predicted) FVC (L) (% Predicted) FEV1/FVC (% Predicted) DLCO (ML/min/mmHg) (% Predicted)
1: On admission 93 75 88 45
2: After 1 mo 100 85 84 46
3: After 2 mo 110 95 83 58

FEV1, forced expiratory volume in one second; FVC, forced vital capacity; DLCO, carbon monoxide diffusing capacity.

Table 2.
Pulmonary Function Tests
  Gender Age Comorbidity Type of IFN Duration PFT Biopsy / BAL Outcome
Kumar et al.13 Female 48 I.V. drug user IFN-α 2b 24 wk Reduced diffusing capacity Bronchial mucosa Resolved with steroids
        PEG IFN-α 2a 6 wk      
  Male 50   IFN-α 2b 4 wk Restrictive pattern Patch fibrosing interstitial pneumonitis Mild excertional dyspnea persists after 1 yr on steroids
Chin et al.19 Female 58   Recombinant IFN 16 wk   BAL-Lymphocyte 74.2%, CD4/CD8 0.16 Resolved after the cessation of IFN treatment
  Female 72 Pulmonary emphysema Natural IFN (Sumiferon) 10 days Obstructive pattern   Maintain intermittent steroid pulse therapy
  Male 56 Taking herbal drugs IFN (IntronA) 2 wk   BAL-Lymphocyte 38.7%, CD4/CD8 0.10 Resolved with steroid

FEV1, forced expiratory volume in one second; FVC, forced vital capacity; DLCO, carbon monoxide diffusing capacity; Aug, August; Sep, September; Oct, October.

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Seong Ran Jeon
https://orcid.org/http://orcid.org/0000-0001-6970-9737

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