Abstract
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 fatal (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.