Prognosis for patients diagnosed with pregnancy-associated breast cancer: a paired case-control study.
OBJECTIVE
Previous studies have suggested that the occurrence of pregnancy concomitantly with a diagnosis of breast cancer may affect the evolution of the neoplasia. The present study aimed to compare pregnancy-associated breast cancer (PABC) patients with non-pregnant cancer patients (controls) in relation to the time taken to diagnose the disease, tumor characteristics and mortality.


METHODS
A retrospective, paired case-control study was conducted at the Hospital da Santa Casa de Misericórdia and Centro de Quimioterapia Antiblástica e Imunoterapia in Belo Horizonte, Brazil.


METHODS
The study involved 87 PABC and 252 control patients. The influence of covariables (interval between first symptoms and diagnosis, tumor histology, size of primary tumor, distant metastasis, grade of malignancy, hormone receptor status and axillary lymph node involvement) and the pregnancy variable on overall survival was investigated using univariate and multivariate analyses.


RESULTS
The median overall survival for PABC patients of 30.1 months (95% confidence interval, CI: 19.4-40.9 months) was significantly different (P = 0.005) from that of the control group (53.1 months; 95% CI: 35.1-71.0 months). The cumulative overall survivals after five and ten years were, respectively, 29.7 and 19.2% for PABC patients, and 47.3 and 34.8% for control patients (P = 0.005). Tumor size, grade of malignancy, distant metastasis and pregnancy were independent factors that significantly modified disease prognosis.


CONCLUSIONS
Pregnancy was an independent prognostic factor. The overall survival of PABC patients was shorter than that of non-pregnant patients.
Clinical Oncology Service at Hospital da Santa Casa de Misericórdia, Belo Horizonte, Minas Gerais, Brazil. wbrant@cqai.com.br
Wagner Brant
WB
Moreira
Eduardo Carvalho
EC
Brandão
Aleida Nazareth
AN
Soares
Clécio Enio Murta de
CE
Lucena
Carlos Maurício Figueiredo
CM
Antunes
D000328:Adult; D001938:Brazil / Q000453:epidemiology; D001943:Breast Neoplasms / Q000175:diagnosis* / Q000401:mortality / Q000473:pathology; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D008875:Middle Aged; D011247:Pregnancy; D011252:Pregnancy Complications, Neoplastic / Q000175:diagnosis* / Q000401:mortality / Q000473:pathology; D011379:Prognosis; D016019:Survival Analysis