What is characteristic of the hydatid cyst?

The most frequent clinical signs and symptoms are abdominal pain, splenomegaly, and fever (,33). Splenic hydatid cysts are usually solitary, and their imaging characteristics are similar to those of hepatic hydatid cysts. Cyst wall calcification may occur and is better depicted at CT than at radiography or US (,33).

What is the most common site for hydatid cyst?

The kidney is the most common location in the urinary tract and has been reported in about 2-3% of all cases of the hydatid cyst. In many of the previous reports from other parts of the globe, the kidney is reported as the third common site of the hydatid cyst after the liver and lung.

What is a hydatid cyst of the liver?

Hydatid cyst of the liver is a parasitic disease caused by Echinococcus granulosus. The principal complications are infection, biliary duct fistula, and rupture into the peritoneum or chest. Diagnosis has become easier with advances in ultrasonic imaging and CT scanning.

What is hydatid cyst liver?

What causes a hydatid cyst?

Cystic echinocccosis (CE), also known as hydatid disease, is caused by infection with the larval stage of Echinococcus granulosus, a ~2–7 millimeter long tapeworm found in dogs (definitive host) and sheep, cattle, goats, and pigs (intermediate hosts).

What complications can occur in hydatid cyst?

5. Complications of hydatid cyst of the liver. Echinococcal cysts of the liver can cause complications in about 40% of cases. The most common complications in order of frequency are infection, rupture to the biliary tree; rupture to the peritoneal cavity; rupture to the pleural cavity.

What is the meaning of hydatid cyst?

Hydatid disease (also known as hydatidosis or echinococcosis) is a potentially serious, sometimes fatal, condition caused by cysts containing the larval stages of the Echinococcus granulosus (E. granulosus) tapeworm (Dog Tapeworm).

What does a hydatid cyst contain?

The cysts contain immature forms of the tapeworm and can increase in size from 5–10 cm or more over a period of time. While some cysts may die, others can remain alive for many years. Cysts also contain ‘daughter cysts’ which, if released, may spread to other areas of the body.

What are the signs and symptoms of hydatid cysts?

There are several signs of hydatid cysts seen associated with hydatid disease: cumbo sign: air is seen between the pericyst and the laminated membrane of the cyst. serpent sign: internal rupture of the cyst with collapse of membranes of the parasite into the cyst.

How common are hydatid cysts in the liver?

Although hydatid cysts may be found in almost any area of the body, the liver is the most frequent site of involvement, with the majority of cysts affecting the right lobe. In a study of 368 patients with hydatid disease, nearly 75% had liver involvement and nearly half of those had cysts solely in the liver.

What are the imaging findings of hepatic hydatid disease?

Hepatic Disease. The right lobe is the most frequently involved portion of the liver. Imaging findings in hepatic hydatid disease depend on the stage of cyst growth (ie, whether the cyst is unilocular, contains daughter vesicles, contains daughter cysts, is partially calcified, or is completely calcified [dead]).

What is the role of CT in the workup of hydatid disease?

Computed tomography (CT) best demonstrates cyst wall calcification and cyst infection. CT and magnetic resonance (MR) imaging may demonstrate cyst wall defects as well as the passage of contents through a defect. Chest radiography, US, CT, and MR imaging are all useful in depicting transdiaphragmatic migration of hydatid disease.