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B Asselain

Publications and source records attributed to B Asselain.

189 records · Page 11Linked to original sources
PubMedDate not supplied

Clinical and biological characteristics of breast cancers in post-menopausal women receiving hormone replacement therapy for menopause.

The paradox of an excess breast cancer incidence among current users of hormone replacement therapy (HRT) without excess in breast cancer mortality raises the question of possible differences in the clinical and biological characteristics of cancers in current HRT users compared to non-users. A consecutive series of 129 post-menopausal patients under HRT for at least 6 months, in whom an operable breast cancer was diagnosed from January 1992 to December 1996, were identified retrospectively. In most cases women had received combination HRT (estrogen and progestative) and the mean duration was 60.4 (range: 6-360) months. Breast cancers diagnosed in post-menopausal patients during 1992-1993 at the Institut Curie constituted the reference series. Cancers in patients receiving HRT were smaller: 78% versus 32% T1 and 12 mm in larger diameter versus 29.5 mm. They were also more often diagnosed radiologically (49 versus 33%). A second group of 420 post-menopausal breast cancer patients whose samples had been referred for steroid hormone receptor and flow cytometric analysis in 1992-1996 were used for comparing biological and pathological information. Cancers of patients receiving HRT tended to be more often grade I and rarely grade III in the Scarf Bloom Richardson classification. Percentage of cells in S-phase as measured by flow cytometry was considerably lower in HRT users compared to control (mean 2.4 versus 3.7, median 2.2 versus 2. 6). Lymph node invasion, ploidy, and steroid hormone receptor expression did not differ significantly between the 2 groups. This apparently more favourable phenotype of breast cancers diagnosed in post-menopausal patients receiving HRT compared to unselected non-HRT users was not confirmed when analysis was restricted to breast cancers of less than 25 mm in diameter. If, as expected, the phenotypic information bears out in terms of prognosis, this may contribute to overcome the reticence in prescribing HRT due to the increased risk of breast cancer. However, it is still not clear whether the biologically less aggressive phenotype is related to the hormone treatment or is simply due to early detection.

Aged↗
PubMedDate not supplied

Medullary breast carcinoma: prognostic implications of p53 expression.

Medullary breast carcinoma (MBC) is a rare pathological type of breast cancer. The rate of p53 protein accumulation is higher in MBC than in common invasive ductal carcinoma. Whether this particular feature of MBC influences the outcome after treatment is unknown. We retrospectively analyzed the characteristics, treatment and outcome of 71 patients with MBC treated between 1981 and 1996. The median age was 51 years (range 27-81) and the median clinical tumor size was 25 mm (range 0-70 mm). Breast-conserving treatment was offered when possible: 55 patients had undergone a tumorectomy and radiotherapy while 16 patients had undergone a mastectomy. p53 protein accumulation was determined by immunohistochemistry on paraffin-embedded tumor specimens from 58/71 samples available for this study. The median follow-up for the 56 survivors was 113 months (range 30-241). The 10-year survival and metastasis-free survival rates were 81% and 81.4%, respectively. The local recurrence rate was 16.4%. The two factors predicting outcome were pathological axillary node involvement in the 60 patients who underwent axillary dissection and adjuvant chemotherapy. p53 accumulation was found in 33/58 patients (57%). p53 status was not predictive of survival nor of distant or local recurrences. We confirm that medullary breast carcinoma has a favorable prognosis despite its aggressive pathological features. p53 protein accumulation, found in the majority of MBCs, was not related to outcome.

Adult↗
PubMedDate not supplied

[Prognostic value of the Lauren and Ming classifications in gastric adenocarcinoma. Multidimensional analysis].

Of the various pathology classifications for gastric carcinoma, those of Lauren and of Ming have been claimed to be of prognostic value. We therefore reviewed the charts of 101 patients (mean age 64 +/- 11 years) treated for gastric carcinoma between 1960 and 1983 at the Institut Curie. We excluded the following patients: 1) those with distant metastases; 2) those who were not operated on; 3) those who underwent laparotomy only, and 4) those who had a palliative procedure. The type of surgery performed was partial gastrectomy in 73 cases and total gastrectomy in 28. Pathology was reviewed according to the WHO, Lauren, and Ming classifications. Were taken into consideration: 1) whether the surgeon believed that removal of tumor was grossly complete or not, 2) the degree of parietal involvement according the pTNM classification system, and 3) the number of positive lymph nodes. Survival was analyzed by the Kaplan Meier method after exclusion of all postoperative deaths. Mean overall survival was 30 months, while that for patients undergoing grossly complete removal of tumor was 34 months. In univariate analysis, no correlation was found between survival and pathology according to Lauren's or Ming's classifications, sex, parietal involvement, or age. Survival was statistically correlated with the size of the tumor (p = 0.015), the gross completeness of surgery (p = 0.008), the type of surgery performed (prognosis was better after partial gastrectomy than after total gastrectomy) and the number of positive lymph nodes (p = 0.0001).(ABSTRACT TRUNCATED AT 250 WORDS)

Adenocarcinoma↗
PubMedDate not supplied

[Hepatic metastases of breast cancer. Analysis of the parameters which influence the response to chemotherapy].

In a serie of 759 patients treated for metastasized cancer of the breast, presence of an hepatic focus was observed in 29 percent of cases. Isolated hepatic metastases were found in 4 percent of cases while in 25 percent they were associated with other tissues. At the time of initial clinical staging, the difference between the hepatic metastases group and the other group stems from the much greater frequency of severity indices in the former group indicating a general and biological transformation of the metastatic tumor(s). At therapeutic staging, the slight effectiveness of medical therapies can be accounted for by the slight tolerance among patients with a secondary hepatic tumor(s). Lastly, it is interesting to note that progesterone receptor presence does not modify the prognosis in hepatic metastases cases.

Adult↗
PubMedDate not supplied

[Interest of glioma 26 in the selected chemotherapy of intracranial tumors (author's transl)].

Glioma 26 (G26) is a chemically induced ependymoblastoma of mouse. It was used through sub-cutaneous and/or intracranial injection in 7 experiences which showed that this experimental model was able to select drugs acting on intracranial tumors : nitrosourea (CCNU), VM 26, procarbazine (PCB). Combination chemotherapy (VM 26-CCNU ; VM 26 CCNU-PCB) was more active than monochemotherapy in 2 out of 3 experiences. It seems that the variability of the results is at least partly due to the important tumoral necrosis in tumors treated by combination chemotherapy and to technical problems. The latters can be avoided by the mechanical dispersion of tumor cells and by their injection through a stereotaxic frame. Selection of drugs is easier and cheaper to perform with G 26 than with other in vivo and in vitro experimental models. The main problem for all models remains their lack of specificity.

Animals↗
PubMedDate not supplied

[Thyroid cancer. A multidimensional analysis of prognostic factors].

189 patients treated from 1970 to 1979 were reviewed. The isolated prognostic value on 10-year survival of age, histology, sex, tumor size and metastases was confirmed. Using Cox model, histology, age and sex appeared to be sufficient to settle a prognosis, while histology was the most determining prognostic factor. From these 3 variables, a prognosis score was proposed. Patients were distributed among 3 prognostic groups, the 10 years survivals of which were respectively 93%, 57% and 28% (p less than 0,001).

Adolescent↗
PubMedDate not supplied

Comparison of the prognostic value of Scarff-Bloom-Richardson and Nottingham histological grades in a series of 825 cases of breast cancer: major importance of the mitotic count as a component of both grading systems.

The most commonly used system in Europe for breast carcinoma was developed by Scarff, Bloom and Richardson (SBR). It was recently modified by Elston and Ellis and significant improvement in reproducibility has been shown by using precise grading guidelines. This study investigated whether the use of this new grade (defined as the Nottingham grade, NG) would improve the prognostic stratification of patients. The respective prognostic value of the two grading schemes was compared in a retrospective series of 825 patients uniformly treated for a small invasive breast carcinoma and followed for a median of 6 years. Univariate and multivariate analysis showed that both histological grades were strongly correlated to overall and metastasis free survival. We have separately analysed the prognostic value of each of the three components used to assess the two grading systems and found that the mitotic index was the only significant prognostic factor for 5 year survival. Univariate analysis showed the count to be more discriminant in the NG scheme (p = 0.0006) than in the SBR scheme (p = 0.04). However, in univariate and multivariate analysis, the prognostic value of the global NG was not significantly better than SBR grade. This may be related, in part, to an uneven distribution of cases reflected by a much lower number of cases with a high mitotic index in the NG system (2%) than in the SBR system (10%). Our study emphasizes the importance of the mitotic count in assessing the prognosis of breast cancers and indicates that the factors which condition this count (tissue processing, microscopic observation, threshold) must be well standardized and controlled.

Adult↗