Abstract: Objective To improve differential diagnosis ability of pulmonary eosinophilia and pulmonary tu-berculosis through analyzing the reason of misdiagnosis between pulmonary eosinophilia and pulmonary tuberculosis.Methods 14 pulmonary eosinophilia cases which were confirmed by clinical and lab test and were misdiagnosed as pulmonary tuberculosis were analyzed retrospectively. Results The symptoms of pulmonary eosinophilia misdiagnoses as pulmonary tuberculosis including coughing, mild phlegm, chest pain, breathlessness, dyspnea, low-grade fever, hypodynamia and night sweat. The duration of the disease was more than three weeks. The thoracic X-ray and CT manifestations were multifarious: the special manifestations were“Y”or botryoidalis shadows, pul- monary atelectasis and obstructive pneumonia changes in the distal obstructive location. Conclusion The reason of misdiagonosis is lack of knowledge of pulmonary eosinophilia. We should be alert to pulmonary eosinophilia that sputum examination is negative, clinical symptom and chest X-ray examination is similar as tuberculosis, but relapses or has no effect after regular therapy.

Key words: Pulmonary eosinophilia, Misdiagnosis, Pulmonary tuberculosis