en Thoracic Surgery Thoracic Surgery case report case report <p> <strong>Abstract</strong></p><p> Alvelolar hydatid disease is caused by E. multilocularis. Human infection occurs at the larval stage of this small tape worm (1.2 to 4.5 mm). In this article we studied alveolar hydatid disease in a 50 year old woman who presented with a hepatic mass. Liver biopsy and histopathologic evaluation showed alvelolar hydatidosis of the liver. Then resection of the left lobe of liver was done, with medical treatment with oral Albendazole (15 mg/kg/12h) for 6 weeks with 2 week intervals. The drug was continued for 4 courses. 5 year follow up of the patient was satisfactory without any complaint.</p> Alveolar Hydatidosis, Liver, Echinococcus, Albendazole 205 207 http://mjiri.iums.ac.ir/browse.php?a_code=A-10-1-237&slc_lang=en&sid=1 S.H. Fattahi Masoom sh.fatahi@yahoo.com 20031947532846002445 20031947532846002445 Yes Department of General and Thoracic Surgery and Pathology,Ghaem Hospital, Ahmadabad st.,Mashad, Iran N. Sharifi Nourieh_sharifi@yahoo..com 20031947532846002446 20031947532846002446 No Department of General and Thoracic Surgery and Pathology,Ghaem Hospital, Mashad, Iran