Male breast cancer: a population-based comparison with female breast cancer.
OBJECTIVE
Because of its rarity, male breast cancer is often compared with female breast cancer.


METHODS
To compare and contrast male and female breast cancers, we obtained case and population data from the National Cancer Institute's Surveillance, Epidemiology, and End Results program for breast cancers diagnosed from 1973 through 2005. Standard descriptive epidemiology was supplemented with age-period-cohort models and breast cancer survival analyses.


RESULTS
Of all breast cancers, men with breast cancer make up less than 1%. Male compared with female breast cancers occurred later in life with higher stage, lower grade, and more estrogen receptor-positive tumors. Recent breast cancer incidence and mortality rates declined over time for men and women, but these trends were greater for women than for men. Comparing patients diagnosed from 1996 through 2005 versus 1976 through 1985, and adjusting for age, stage, and grade, cause-specific hazard rates for breast cancer death declined by 28% among men (P = .03) and by 42% among women (P approximately 0).


CONCLUSIONS
There were three intriguing results. Age-specific incidence patterns showed that the biology of male breast cancer resembled that of late-onset female breast cancer. Similar breast cancer incidence trends among men and women suggested that there are common breast cancer risk factors that affect both sexes, especially estrogen receptor-positive breast cancer. Finally, breast cancer mortality and survival rates have improved significantly over time for both male and female breast cancer, but progress for men has lagged behind that for women.
Anderson
William F
WF
Biostatistics Branch (BB), DHHS/NIH/NCI/Division of Cancer Epidemiology and Genetics (DCEG), EPS, Room 8036, 6120 Executive Blvd, Bethesda, MD 20892-7244, USA. wanderso@mail.nih.gov
Jatoi
Ismail
I
Tse
Julia
J
Rosenberg
Philip S
PS
D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D001943:Breast Neoplasms / Q000453:epidemiology / Q000401:mortality; D018567:Breast Neoplasms, Male / Q000453:epidemiology* / Q000401:mortality; D002648:Child; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D009376:Neoplasms, Hormone-Dependent / Q000453:epidemiology / Q000401:mortality; D011960:Receptors, Estrogen / Q000378:metabolism; D012307:Risk Factors; D018426:SEER Program; D016019:Survival Analysis; D013997:Time Factors; D014481:United States / Q000453:epidemiology
D011960:Receptors, Estrogen