Hydatid cyst of the colon: A systematic review of the literature

Table 2 Analytical, radiological and endoscopic studies

Ref.	Leukocytosis	Hydatid Serology	Abdominal X-ray	Ultrasound	CT	Contrast studies	Colonoscopy
Sapkas et al[13], 1972	NA	NA	Calcified splenic cyst	NA	NA	Adhesion cyst-left colon	NA
Ortiz et al[12], 1987	Shift to the left	NA	Elevated right hemidiaphragm	NA	Gas-filled cavity in the right lobe of the liver	Sliding hiatal hernia and fistula extending from the colon to the liver cavity	NA
Puras et al[11], 1989	No (3700/mm3)	Positive	No significant alterations	Intrabdominal cavity of 10.3 × 10.7 cm with cystic appearance	ND	Presence of fistula allows the filling of the hydatid cyst	Sigmoid fistula (3 cm) with opening to polycystic cavity at 23 cm from anal margin
Leviav et al[10], 1996	NA	NA	NA	NA	NA	NA	-
Lo Casto et al[9], 1997	Eosinophilia (20%)	NA	NA	Large oval mass with well-defined wall and a complex echo pattern. Hyperechoic tracts inside the wall with acoustic shadowing	Mass originated from the liver extending from left hemidiaphragm to sacro-iliac joint, situated between left transverse and descending segments of colon, partially calcified and with mixed density content (liquid with bubbles and air-fluid level)	NA	NA
Astarcioglu et al[8], 2001	Yes (21000 /mm3)	Positive	Dilated right and transverse colon; Left colonic obstruction	Dilated colonic segments and ascites	NA	NA	NA
Fernández Salazar et al[7], 2005	NA	NA	Large lobulated calcification of liver cyst with aerial content	Calcified cystic lesion (8.5 cm) in right hepatic lobe	Right hepatic lobe hypertrophy, 8 cm cystic cavity with calcified wall with intra and perilesional air	Hepatic cystic cavity filled with contrast in communication with the colon at the level of the hepatic angle	In hepatic angle, a blackish hemispherical stone structure inside which it was possible to access through a notch
Teke et al[6], 2008	Yes (18600/mm3)	NA	NA	NA	Ruptured cystic lesion (5.4 cm × 5.6 cm) in the inferior pole of the spleen. Hyperdense material filling the left colon and multiple cystic lesions in the abdominopelvic region. Gas in the cystic cavity	Extravasation of contrast at the level of splenic hilus and colon’s splenic flexure	Failed to show the source of the bleeding due to active major bleeding
Restivo et al[5], 2010	NA	NA	NA	NA	Colonic distention caused by a 6-cm intraluminal ovoidal cystic mass with peripheral calcification in the sigmoid colon	NA	The cyst was stuck to the mucosa (sigma)

NA: Not available.