Water-lily sign: A case report

Echinococcosis (or hydatid disease) is a zoonotic disease caused by the larval form of Echinococcus granulosus or Echinococcus alveolaris. It continues to be endemic in developing countries including India. Liver is the most common organ involved but the parasite can affect any organ in the body. A 45 year old lady who presented with abdominal pain was subjected to ultrasonography and MRI of the abdomen which showed the characteristic “water lily sign” of hydatid cyst. Patient underwent pericystectomy, and on followup screening ultrasound has remained free of disease recurrence.