Unusual presentation of iliac bone hydatid cyst

A 21-year-old woman presented with a painless growing mass in her right flank since 5 months before. With the probable diagnosis of a cold abscess, the patient was operated, but the wound was not cured. The patient was re-examined and a biopsy from the lesion was taken which revealed hydatid cyst. After nearly complete excision of the infected area and adjuvant chemotherapy with albendazole for 6 weeks, no recurrence was seen until 14 months after the operation