Breast cancer during the HIV epidemic in an African population

Both human immunodeficiency virus (HIV) infection and certain malignancies including breast cancer occur predominantly in premenopausal women in an Af rican population. Cancers that are associated with HIV infection are Kaposi 's sarcoma (KS), non-Hodgkin's lymphoma (NHL) and invasive cervical carcino ma. Recently, cases of breast cancer have been reported in patients with HI V infection but an association between breast cancer and HIV infection has yet to be determined. The present study investigated for association betwee n HIV infection and breast cancer. Among the 101 patients studied, 50 were cases with breast cancer while the remaining 51 were referents with conditi ons other than mammary cancer. Patients with breast cancer 30 years of age and below recorded in the Cancer registry during 1974-1987 constituted 8% w hile those recorded during the ongoing AIDS epidemic amounted to only 2%. W hen a similar comparison was undertaken among patients below 50 years there was also an overall decrease in the proportion of patients from 76.1 to 58 .0%. Conversely, in the age groups above 50 years the breast cancer cases i ncreased from 33.9 to 42% respectively (chi (2)=1.83 on 1df, p=0.18). The o verall prevalence of HIV infection among the control group was 35.5% (95% C I=22.2-48.4) while among breast cancer patients it was 6% (95% CI=0.6-12.6) . Women below 50 years of age with breast cancer were less likely to be HIV positive; OR=0.18: (95% CI=0.04-0.76) chi (2)=5.95; p=0.01. However, there is no basis to suggest that HIV infection is protective against this malig nancy. AIDS associated mortality commonly occurs in the second and third de cades of life and probably these deaths have changed the demographic of the disease in an African population. The impact of AIDS associated mortality on cancer registries needs attention.