A CASE OF PSEUDOTHROMBOCYTOPENIA ACCOMPANIED WITH INTERSTITIAL PNEUMONIA

A 53-year-old man was admitted to our hospital because of a high grade fever and dry cough. A chest X-ray examination and chest computed tomography showed interstitial shadows in the bilateral lung fields. His blood IgE level was 554.2 IU/ml. He was diagnosed as having acute interstitial pneumonia. Interstitial shadows were not improved in spite of antibiotics administered. His blood platelet level decreased to 1.8× 10^4/μL with the bilateral interstitial shadows worsening. Thrombocytopenia was found to be pseudothrombocytopenia by various laboratory data. Administration of prednisolone was started for acute interstitial pneumonia. After administration of prednisolone, acute interstitial pneumonia improved and his blood platelet level was normalized. This is a rare case of pseudothrombocytopenia accompanied with acute interstitial pneumonia