Breast cancer among women from Gothenburg with regard to age, mortality and coexisting benign breast disease or leiomyoma uteri.

The entire female population of Gothenburg, aged 20 years or above as of November, 1969 (n = 162,449), was studied for virtually all inpatient hospital admissions in 1970-1979 with breast cancer (n = 2,411). After the vital status as of December, 1984 had been traced, cases of fetal (n = 1,502) and of nonfatal (n = 909) breast cancer were separated. A search for coexisting benign breast disease and leiomyoma uteri yielded significant recordings of disease association exclusively with nonfatal breast cancer.