Parietal Abdominal Wall Swelling Turning Out To Be a Parietal Complication of Hydatid Cyst of Liver - A Case Report. -
Hydatid cyst is the disease of liver and lungs, but this disease may occur in any part of world and anywhere in the body. This report presents hydatid cyst located in the liver which presented as a superficial parietal abdominal wall swelling. 
A 65 year old female patient from central Dhule district of Maharashtra came with chief complaints of a painless mass in the Right hypochondriac region since 10 years, gradually increasing in size. Clinically it seemed to be a parietal abdominal wall swelling but ultrasound revealed lesion to be a hydatid cyst of the liver which had herniated out through the abdominal wall in spite of there being no evidence any abdominal wall defect congenital / acquired at the site of presentation. Hydatid cyst of the liver can with / without getting ruptured spread to various structures around the liver. 
Spread of hydatid cyst of liver to the adjacent abdominal wall is called as “The Parietal complication” of this disease, which are 1) subcutaneous rupture of the cyst and 2) spontaneous cysto-cutaneous fistula of liver hydatid cyst. There have been reports published of cases with spontaneous subcutaneous rupture of hydatid cyst of liver, hydatid cyst of liver presenting as cysto-cutaneous fistula and previously operated hydatid cyst of liver with abdominal wall recurrence, but case reports with intact hydatid cyst of liver presenting as a superficial parietal abdominal wall swelling has not yet been reported .
Parietal complications of hydatid cyst of the liver are extremely rare. The diagnosis is usually established by USG and CT-scan.
In our case patient had a hydatid cyst of liver, which herniated out of abdomen inspite of no history of any trauma or surgery in past. The swelling was not having any discharge, nor had it ruptured in the subcutaneous space. Our case an “Intact Hydatid cyst of liver herniated through a normal abdominal wall” is, to the best of our knowledge, the 1st case reported of this kind.