Abstract
Objective: To assess correlation between type of breast cyst and risk of breast cancer in women with gross cystic disease of the breast. Design: Cohort study of women with breast cysts aspirated between 1983 and 1993 who were followed up until December 1994 for occurrence of breast cancer. Setting: Major cancer prevention centre. Subjects: 802 women with aspirated breast cysts. Main outcome measures: Type of breast cyst based on cationic content of cyst fluid: type I (potassium:sodium ratio > 1.5), type II (potassium:sodium ratio <1.5), or mixed (both types). Subsequent occurrence and type of breast cancer. Results: After median follow up of six years (range 2-12 years) 15 cases of invasive breast cancer and two ductal carcinomas in situ were diagnosed in the cohort: 12 invasive cancers (and two carcinomas in situ) among the 417 women with type I cysts, two cancers among the 325 women with type II cysts, and one among the 60 women with mixed cysts. The incidence of breast cancer in women with type I cysts was significantly higher than that in women with type II cysts (relative risk 4.62 (95% confidence interval 1.26 to 29.7)). These results were confirmed after adjustment for several risk factors for breast cancer (relative risk 4.24 (1.12 to 27.5)). Conclusions: The increased risk of breast cancer of women with breast cysts seems to be concentrated among women with type I breast cysts.
| Original language | English |
|---|---|
| Pages (from-to) | 925-928 |
| Number of pages | 4 |
| Journal | British Medical Journal |
| Volume | 314 |
| Issue number | 7085 |
| Publication status | Published - 1997 |
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Cohort study of association of risk of breast cancer with cyst type in women with gross cystic disease of the breast. / Bruzzi, Paolo; Dogliotti, Luigi; Naldoni, Carlo; Bucchi, Lauro; Costantini, Massimo; Cicognani, Alessandra; Torta, Mirella; Buzzi, Gian Franco; Angeli, Alberto.
In: British Medical Journal, Vol. 314, No. 7085, 1997, p. 925-928.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Cohort study of association of risk of breast cancer with cyst type in women with gross cystic disease of the breast
AU - Bruzzi, Paolo
AU - Dogliotti, Luigi
AU - Naldoni, Carlo
AU - Bucchi, Lauro
AU - Costantini, Massimo
AU - Cicognani, Alessandra
AU - Torta, Mirella
AU - Buzzi, Gian Franco
AU - Angeli, Alberto
PY - 1997
Y1 - 1997
N2 - Objective: To assess correlation between type of breast cyst and risk of breast cancer in women with gross cystic disease of the breast. Design: Cohort study of women with breast cysts aspirated between 1983 and 1993 who were followed up until December 1994 for occurrence of breast cancer. Setting: Major cancer prevention centre. Subjects: 802 women with aspirated breast cysts. Main outcome measures: Type of breast cyst based on cationic content of cyst fluid: type I (potassium:sodium ratio > 1.5), type II (potassium:sodium ratio <1.5), or mixed (both types). Subsequent occurrence and type of breast cancer. Results: After median follow up of six years (range 2-12 years) 15 cases of invasive breast cancer and two ductal carcinomas in situ were diagnosed in the cohort: 12 invasive cancers (and two carcinomas in situ) among the 417 women with type I cysts, two cancers among the 325 women with type II cysts, and one among the 60 women with mixed cysts. The incidence of breast cancer in women with type I cysts was significantly higher than that in women with type II cysts (relative risk 4.62 (95% confidence interval 1.26 to 29.7)). These results were confirmed after adjustment for several risk factors for breast cancer (relative risk 4.24 (1.12 to 27.5)). Conclusions: The increased risk of breast cancer of women with breast cysts seems to be concentrated among women with type I breast cysts.
AB - Objective: To assess correlation between type of breast cyst and risk of breast cancer in women with gross cystic disease of the breast. Design: Cohort study of women with breast cysts aspirated between 1983 and 1993 who were followed up until December 1994 for occurrence of breast cancer. Setting: Major cancer prevention centre. Subjects: 802 women with aspirated breast cysts. Main outcome measures: Type of breast cyst based on cationic content of cyst fluid: type I (potassium:sodium ratio > 1.5), type II (potassium:sodium ratio <1.5), or mixed (both types). Subsequent occurrence and type of breast cancer. Results: After median follow up of six years (range 2-12 years) 15 cases of invasive breast cancer and two ductal carcinomas in situ were diagnosed in the cohort: 12 invasive cancers (and two carcinomas in situ) among the 417 women with type I cysts, two cancers among the 325 women with type II cysts, and one among the 60 women with mixed cysts. The incidence of breast cancer in women with type I cysts was significantly higher than that in women with type II cysts (relative risk 4.62 (95% confidence interval 1.26 to 29.7)). These results were confirmed after adjustment for several risk factors for breast cancer (relative risk 4.24 (1.12 to 27.5)). Conclusions: The increased risk of breast cancer of women with breast cysts seems to be concentrated among women with type I breast cysts.
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UR - http://www.scopus.com/inward/citedby.url?scp=0030932406&partnerID=8YFLogxK
M3 - Article
C2 - 9099114
AN - SCOPUS:0030932406
VL - 314
SP - 925
EP - 928
JO - British Medical Journal
JF - British Medical Journal
SN - 0959-8146
IS - 7085
ER -