Baska bir primer kaynak saptanamayan atipik lokalizasyonlu üç kist hidatik olgusu sunulmustur. Kist hidatik hastaligi tarih boyunca görülmüs paraziter bir hastalik olup, en sik karaciger ve akcigerlerde yerlesmektedir. Yumusak doku ve retroperiton yerlesimi nadirdir. Sag toraks arkasinda kas içinde, sol klavikuler bölge altinda subkutan ve sag fossa iliakada retroperiton yerlesimli üç olgu sunulmustur. Kas içi ve subkutan yerlesimli olgularda kistler total eksizyon sonrasi makroskopik olarak tanindi. Diger olguda ise preoperatif tomografik ve serolojik bulgular ile tani konuldu. Ilk iki olguda ameliyat sonrasi serolojik testler negatifti. Olgularda diger organlarda kist hidatik bulgusuna rastlanmadi. Kist hidatik ülkemizde endemik bir hastalik olup atipik yerlesimlerin de sözkonusu oldugu bilinmelidir, özellikle yumusak doku kitleleri degerlendirilirken bu hastali gin hatirlanmasi gerekmektedir.
Three hydatid cyst cases, without any other primary disease and with atypical sites of localization, are reported. Hydatid disease historically most often involves the liver and the lungs; soft tissue and retroperitoneal localizations are rare. The first patient had intramuscular cyst located in the right thorax posterior area, the second had subcutaneous cyst located in the left infraclavicular area, and the third had retroperitoneal cyst in the right iliac fossa. Diagnoses were established when the cysts were removed in the first two cases, while in the retroperitoneal case, diagnosis was established with tomography and serological tests preoperatively. Postoperatively, serologic tests were negative in the first two cases, and other systems were normal in all cases. Since hydatid disease is endemic in our country, we should remember this disease especially when evaluating soft tissue masses.