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Pulmonary manifestations and progression of lung disease in juvenile-onset mixed connective tissue disease

Hetlevik, Siri Opsahl; Flatø, Berit; Aaløkken, Trond Mogens; Samersaw-Lund, May Brit; Reiseter, Silje; Mynarek, Georg; Nordal, Ellen Berit; Rygg, Marite; Lilleby, Vibke
Journal article, Peer reviewed
Accepted version
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Hetlevik (553.7Kb)
URI
http://hdl.handle.net/11250/2636167
Date
2019
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  • Institutt for klinisk og molekylær medisin [2016]
  • Publikasjoner fra CRIStin - NTNU [19946]
  • Publikasjoner fra Cristin - St. Olavs hospital [313]
  • St. Olavs hospital [532]
Original version
Journal of Rheumatology. 2019, 46 (1), 93-100.   10.3899/jrheum.180019
Abstract
Objective. To assess the occurrence and extent of interstitial lung disease (ILD) in patients with juvenile mixed connective tissue disease (JMCTD), compare pulmonary function in patients and matched controls, study associations between ILD and disease-related variables, and examine progression of pulmonary manifestations over time.

Methods. A cohort of 52 patients with JMCTD were examined in a cross-sectional study after a mean 16.2 (SD 10.3) years of disease duration with high-resolution computed tomography (HRCT) and pulmonary function tests (PFT) comprising spirometry, DLCO, and total lung capacity (TLC). Matched controls were examined with PFT. Previous HRCT and PFT were available in 37 and 38 patients (mean 8.8 and 10.3 yrs before study inclusion), respectively.

Results. Compared to controls, patients with JMCTD had lower forced vital capacity (FVC), DLCO, and TLC (p < 0.01). The most frequent abnormal PFT was DLCO in 67% of patients versus 17% of controls (p < 0.001). Fourteen patients (27%) had ILD on HRCT. Most had ILD in < 10% of their lungs. ILD was associated with low values for FVC and TLC, but not with DLCO. HRCT findings did not progress significantly over time, but FVC declined (p < 0.01).

Conclusion. Compared to controls, patients with JMCTD had impaired pulmonary function. ILD was present in 27% of patients after a mean 16 years of disease duration, mostly as mild disease, and did not progress. ILD seems to be less common in juvenile-onset than in adult-onset MCTD, and ILD in JMCTD seems mostly mild and stable over time.
Publisher
Journal of Rheumatology
Journal
Journal of Rheumatology

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