Bilateral peripheral infiltrates refractory to immunosuppressants were diagnosed as autoimmune pulmonary alveolar proteinosis and improved by inhalation of granulocyte/macrophage-colony stimulating factor.
A 55-year-old non-smoking woman was admitted to our hospital for re-evaluation of unimproved peripheral ground-glass opacities despite prednisolone and cyclosporine treatment. She was diagnosed with autoimmune pulmonary alveolar proteinosis (PAP) based on transbronchial lung biopsy and granulocyte/macrophage colony-stimulating factor (GM-CSF) antibody testing. GM-CSF inhalation therapy markedly improved the opacities. Bilateral, centrally located lung opacities are typical in PAP, however 10 PAP cases with peripheral infiltration were reported in Japan recently, of which GM-CSF antibody was positive in six. To avoid inappropriate immunosuppressant treatment, PAP should be considered in the differential diagnosis of such peripheral opacities. GM-CSF antibody might be useful for diagnosis.
Department of Respiratory Medicine, Tohoku University Graduate School of Medicine, Japan.
Hironori
H
Satoh
Ryushi
R
Tazawa
Tomohiro
T
Sakakibara
Shinya
S
Ohkouchi
Masahito
M
Ebina
Makoto
M
Miki
Koh
K
Nakata
Toshihiro
T
Nukiwa
D000280:Administration, Inhalation; D001323:Autoantibodies / Q000097:blood; D001327:Autoimmune Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000188:drug therapy* / Q000276:immunology; D003937:Diagnosis, Differential; D005260:Female; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000008:administration & dosage* / Q000276:immunology; D006801:Humans; D007166:Immunosuppressive Agents / Q000627:therapeutic use; D008875:Middle Aged; D011649:Pulmonary Alveolar Proteinosis / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000188:drug therapy* / Q000276:immunology; D014057:Tomography, X-Ray Computed
D001323:Autoantibodies; D007166:Immunosuppressive Agents; D016178:Granulocyte-Macrophage Colony-Stimulating Factor