Hydatid disease, a common health problem in Turkey as in many countries, sh
ould be included in the differential diagnosis of all patients presenting w
ith at cystic mass in the abdominal or thoracic cavity. Previously, surgery
had been the main form of treatment. But with the introduction of preopera
tive medication with albendazole, treating this disease medically is now gr
owing in popularity. We report herein the findings of ten patients with two
lung and 20 liver hydatid cysts ranging from 3 to 20 cm in diameter, who w
ere successfully treated with medical therapy. Multiple organ involvement a
nd multiple cysts in an organ are tile main indications for medical treatme
nt with albendazole, but the indications should not be limited to certain s
ituations such as small-sized cysts, since even huge-sized cysts responded
well to the therapy in this series.