Thoracic manifestation of myeloperoxidase-antineutrophil cytoplasmic antibody (MPO-ANCA)-related disease. CT findings in 51 patients.
OBJECTIVE
To assess the pulmonary CT findings of patients with serum evidence of the myeloperoxidase-antineutrophil cytoplasmic antibody (MPO-ANCA).


METHODS
The pulmonary CT scans of 62 patients with serum evidence of MPO-ANCA (51 with microscopic polyangiitis, 11 with Churg-Strauss syndrome) were retrospectively assessed with regard to parenchymal, pleural, and mediastinal abnormalities.


RESULTS
On the CT scans, abnormal findings were seen in 51 of the patients (82%, n = 62). Of the patients, the CT findings consisted of ground-glass attenuation in 48 of the patients (94%, n = 51), consolidation in 40 (78%), and thickening of bronchovascular bundles in 26 (51%). Pathologically, these findings corresponded to alveolar hemorrhages, interstitial chronic inflammation in the alveolar septa, vasculitis, or fibrosis. These abnormalities were predominantly seen in peripheral lung parenchyma (n = 37).


CONCLUSIONS
The CT findings in patients with MPO-ANCA consisted mainly of ground-glass attenuation and consolidation in the peripheral lung. These findings, although nonspecific, are considered as pulmonary involvement in patients with MPO-ANCA.
Ando
Yumiko
Y
Department of Academic Radiology, Oita University Faculty of Medicine, Idaigaoka, Hasama-machi, Oita 879-5593, Japan. ANDOY@med.oita-u.ac.jp
Okada
Fumito
F
Matsumoto
Shunro
S
Mori
Hiromu
H
D000293:Adolescent; D000328:Adult; D000368:Aged; D019268:Antibodies, Antineutrophil Cytoplasmic / Q000097:blood*; D014408:Biomarkers, Tumor / Q000097:blood*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009195:Peroxidase / Q000097:blood*; D012189:Retrospective Studies; D013896:Thoracic Diseases / Q000097:blood* / Q000000981:diagnostic imaging* / Q000201:enzymology / Q000276:immunology; D014057:Tomography, X-Ray Computed
D019268:Antibodies, Antineutrophil Cytoplasmic; D014408:Biomarkers, Tumor; D009195:Peroxidase