Table 1. Spontaneous regression of pancreatic pseudocysts.

Reference	Study period	Etiology alcohol	Diagnostic criteria (CT, US)	Chronic pancreatitis (ERCP)	Definition of pseudocysts by the Atlanta criteria	Spontaneous regression
Czaja et al. 1975 (e10)	1970–1972	80%	No	No	No	70%
Pollak et al. 1978 (e2)	1966–1976	NA	Some	No	No	30%
McConnell et al. 1982 (e14)	1960–1981	NA	Some	No	No	20%
Aranha et al. 1983 (e3)	1974–1981	97%	All	No	Yes	29%
Agha 1984 (e8)	1977–1982	80%	All	No	No	20%
Warshaw und Rattner (4)	1985	NA	All	Yes	No	21%
London et al. 1989 (e20)	1984–1986	NA	All	No	No	64%
Bourliere und Sarles 1989 (e23)	1972–1985	4%	All	Yes	Yes	20%
Maringhini et al. 1999 (48)	1986–1995	0%	All	No	Yes	65%
Mehta et al. 2004 (e36)	2001–2003	60%	Some	Yes	Yes	60%
Cheruvu et al. 2003 (e33)	1991–2002	14%	Some	Yes	Yes	39%

CT, computerized tomography; US, ultrasonography; ERCP, Endoscopic retrograde cholangiopancreatography; NA, data not available