54 year old female came with neck swelling on the left side. CT scan showing flid attenuation lesion inthe left side of the neck extending to superior mediastinum (arrow). The lesion shows cyst in cyst appearance (arrow head) suggetive of daughter cyst. The findings are consistent with hydatid cyst.
Hydatid cysts in the neck are quite rare, even in areas where the disease is endemic. The role of radiological investigation is important and, in these cases, the involvement of other organs should be investigated. The cyst should be excised as a whole, without being ruptured, to prevent any treatment complications.