Abstract
An 81-year-old man with complaints of dysphagia and weight loss was admitted to our hospital. Upper gastrointestinal endoscopy revealed advanced gastric cancer. Fever of unknown origin with leukocytosis persisted after admission. A granulocyte-colony stimulating factor (G-CSF)-producing gastric cancer was suspected because of elevated serum G-CSF levels. Surgery was performed in spite of the patient’s poor general condition. He went into acute respiratory distress from aspiration pneumonia after surgery and respiratory management with assisted ventilation was needed. Enteral feeding was difficult initially, but oral intake could eventually be resumed. The patient’s condition improved sufficiently to be discharged.