Primary Retroperitoneal Hydatid Cyst: a Rare Case Report - Yusuf Sherwani, Afak; Sarmast, Arif Hussain; Malik, Ajaz Ahmad; Shah, Mubashir; Q-Parray, Fazl; A-Wani, Muneer; Dangroo, Sajad (Acta Medica Iranica, 2015)