[A Case Diagnosed Toxocariasis After the Intiation of Treatment with Steroids for Eosinophilic Granulomatosis with Polyangitis (EGPA)]

Toxocariasis causes a variety of symptoms. We experienced a case of toxocariasis which was initially treated with steroids for Eosinophilic Granulomatosis with Polyangitis (EGPA). A 53-year-old woman with the past medical history of bronchial asthma presented at the outpatient department in the middle of August. She complained of chest discomfort lasting for one week. Ischemic heart disease was initially suspected due to ST depression on ECG and positive Troponin I. However coronary angiography did not reveal any abnormality. Her symptoms continued and after one month she presented at the hospital again with an elevated eosionophil count. Chest computed tomography showed ground glass opacities on both lungs. She was diagnosed as having EGPA based on her clinical symptoms and the results of the blood test which were consistent with the diagnostic criteria of EGPA. After prednisolone was prescribed, her symptoms and eosinophilia dramatically improved. However, we found that the histology of the lung and kidney was not compatible with EGPA and the result of serum parasite antibodies turned out to be strongly positive for toxocariasis after initiating predonisolone. Based on this result, we concluded that our patient had a case of toxocariasis and prescribed albendazole in addition to prednisolone. The patient completed a 3-week course of albendazole and a 3-month course of prednisolone without any problems. In general, steroids are not commonly used as a treatment of toxocariasis, however it seems to have been effective in this case. Toxocariasis shows a variety of symptoms and can be misdiagnosed as other diseases such as EGPA.