Mutational analysis of BRCA1 and BRCA2 genes in Mexican breast cancer patients.

Germline mutations in the BRCA1 and BRCA2 genes predispose to breast and ovarian cancer. A variable incidence of mutations has been reported for these genes. The contribution of BRCA1 and BRCA2 mutations to Mexican women with breast and/or ovarian cancer is not known. Because of the increasing prevalence of breast cancer in this population, it is necessary to study the presence of mutations in both genes. We screened BRCA1 and BRCA2 genes in 40 patients: 29 patients with a history of breast and/or ovarian cancer, and 11 patients with early-onset breast cancer (< 40 years), through denaturing high performance liquid chromatography analyses. We found two frameshift mutations in BRCA1 and one missense mutation in each gene. Additionally we found several intronic variants as well as synonymous mutations. We found 5% of deleterious mutations in the BRCA genes. Larger studies are needed to establish the significance and prevalence of BRCA mutations among Mexican women.

A 7 year experience with immediate breast reconstruction after skin sparing mastectomy for cancer.

Skin sparing mastectomy (SSM) is a procedure that has gained popularity for patients who elect to have a mastectomy as the treatment for carcinoma of the breast. Reconstruction of the breast after SSM yields the best aesthetic results since it preserves most of the skin envelope and the inframammary fold. The purpose of this study was to evaluate the oncologic safety and aesthetic results for SSM and immediate breast reconstruction. One hundred and five patients treated between April 1997 and December 2004 were reviewed. The mean age of the patients was 40 years. The mean follow up was for 48 months, considered from the time of SSM and reconstruction. Reconstructive techniques included pedicled transverse rectus abdominis muscle (TRAM) flap (n: 70 patients), tissue expanders and implants (n: 29 patients), latissimus dorsi flaps and implants (n: 6 patients). Aesthetic results were judged by an independent plastic surgeon and by the patient as excellent, good, fair or poor. The findings of this study demonstrate that SSM and immediate breast reconstruction can be safely performed. Detection and treatment of recurrences were not inhibited by the reconstructions. In this experience the best results were seen after TRAM flap reconstructions. The general level of satisfaction expressed by the patient was correlated with a good appearance of the reconstructed breast and the physical comfort.

A descriptive study of second primary malignancies associated to breast cancer in a mexican Hispanic population.

Breast cancer is the second most frequent tumor in Mexico. Patients diagnosed with this cancer have a higher risk of developing a second malignancy. The objective of our study was to see the frequency, types of second cancers, and its impact on survival, in order to be able to deliver a proper and efficient follow up to these patients, because our patients differ from the population of breast cancer in the rest of the world. Our patients are younger and therefore at higher risk. The clinical records of breast cancer patients treated at the Instituto Nacional de Cancerologia Mexico from 1983 to 1992 were reviewed. In 1370 evaluable patients, 77 (5.6%) developed a second neoplasm, of those, 56 (72.7%) in the contralateral breast and 21 in other sites (27.3%), thyroid was the most frequent followed by ovary and endometrium. Mean age of the patients was 51.5 yr, 45.5 for the other breast and 55.5 for other malignancies (p = 0.01). Median survival for all the group was of 180 mo (3-238). Patients were significantly younger in the contralateral breast group, although all our breast cancer patients are younger. The most frequent second malignancy after the other breast, was thyroid followed by ovary and endometrium with similar survival for both groups.