[Epidemiology of apparently benign XXXX ].

@entity43 @entity1 @entity48 @entity42 @entity46
The incidence of @entity42 in the general population is difficult to estimate. Certain cysts are functional and generally not operated, except in case of complications. Others are organic cysts which are usually, but not always operated. Data is available only from surgical series or pathology reports. An analysis of the literature shows that for operated cysts, approximately 75% are organic, 25% are function and 1 to 4% of the supposed benign cysts are found to be malignant. In France, the PMSI database on public and private institutions is available on the net (www.le-pmsi.fr). The number of hospital stays for @entity43 or @entity42 was to the order of 45,000 in 1998 and 1999. Twenty-one percent of these @entity1 were discharged without surgery. Most had a functional @entity43 . This leaves 32,000 @entity1 who underwent surgery annually for an @entity42 . Nearly 7000 @entity1 were hospitalized for follicular or yellow body cysts, i.e. 15%, with an incidence of 29/100,000 @entity1 over the age of 15 years. The abstention rate for hospitalized @entity1 with a follicular cyst or a yellow body cyst was 30 to 40%. For @entity46 , there were 5218 hospitalizations in 1999 (2137 in the public hospitals and 3081 in private clinics) (11% of the hospitalizations). The rate of abstention was 11% (15% in the public hospitals and 8% in private clinics). Approximately 4100 @entity1 thus underwent surgery, including 13% for @entity42 . According to data in the literature, serous and mucinous cysts account for 20 to 30% of the operated cysts and @entity48 for 10 to 20%. The type of cyst cannot be identified with the international WHO classification used in the PMSI.
