However, pre-operative diagnosis of pelvic hydatid diseases can be possible with imaging study such as USG, CT scan by noting features such as multilocular appearance, cyst wall calcification, a fluid level from hydatid sand and the ultrasonic water lily sign
.  However, in the present case, USG and CT scan could not detect such abnormality.
Three years later she was re-admitted with complaints of breathlessness, wheezing and cough with expectoration and reevaluation CT scan of chest showed classical sign of ruptured hydatid cyst (water lily sign
) and increase in size of other cyst.