| 1. |
- Gentile, Massimiliano, et al.
(författare)
-
Deletion mapping of chromosome segment 11q24-q25, exhibiting extensive allelic loss in early onset breast cancer
- 2001
-
Ingår i: International Journal of Cancer. - 0020-7136 .- 1097-0215. ; 92:2, s. 208-213
-
Tidskriftsartikel (refereegranskat)abstract
- Frequent allelic deletions at chromosome 11q24-q25 have been described in both early and late onset breast cancers, suggesting the existence of a gene locus implicated in the initiation and/or progression of the disease. In the present study we fine mapped this region further by loss of heterozygosity (LOH) analysis in a population of early onset breast cancer cases (n = 102, 22 to 36 years old). Loss of chromosomal material was assessed for possible association with patient survival as well as Nottingham histologic grade (NHG). Additionally, we investigated the involvement of the 11q24-q25 locus in a group of familial breast cancer cases with no detectable BRCA1 or BRCA2 gene alterations (n = 32, ages 28 to 40 years). Among the consecutive patients, extensive LOH was observed for all markers at 11q24-q25, with frequencies ranging from 42% to 54%. Deletion at the D11S4125 marker was found to be associated with reduced survival (p = 0.026), whereas the adjacent D11S387 marker correlated with higher histologic grade (p = 0.042). In the familial cases, the most telomeric markers showed substantially lower proportions of LOH, ranging from 10% to 21%. Comparison of the two patient groups demonstrated that this difference in LOH frequency was statistically significant for the D11S4098, D11S968, D11S387 and D11S4125 markers (p = 0.020, p = 0.029, p = 0.0070 and p = 0.0030, respectively). We conclude that 11q25 may harbor a gene implicated in early onset breast cancer. Our data suggest that the most probable position for this locus is defined by the markers D11S387 and D11S4125 and furthermore that it may play a less significant role in familial breast cancer cases not linked to either of the BRCA genes.
|
|
| 2. |
- Sundquist, Marie, et al.
(författare)
-
Incidence and prognosis in early onset breast cancer
- 2002
-
Ingår i: Breast. - : Elsevier BV. - 0960-9776 .- 1532-3080. ; 11:1, s. 30-35
-
Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to assess the incidence and prognosis in early onset breast cancer. Age-adjusted incidence and death rate for the 5394 Swedish women diagnosed with breast cancer under the age of 40 between 1960 and 1996 was studied using data from the Swedish Cancer Registry and Swedish Death Cause Registry. A total of 107 consecutive young patients with invasive breast cancer undergoing surgery during 1980–1993 in the Southeast Swedish health care region were retrospectively followed up and their cancers reviewed and graded blindly. The median follow-up time was 11.2 years. The applicability of the Nottingham Prognostic Index (NPI) as a prognostic tool was investigated. Grade, age, node status, tumour size, S-phase fraction and steroid receptor content were related to survival univariately and multivariately in a Cox proportional hazard analysis.The incidence of early onset breast cancer has increased moderately and the survival rate has not improved during the last 35 years. When young women are diagnosed with breast cancer their tumours are larger, their lymph nodes more often involved, and the median grade higher than in older with 64% having grade 3 tumours. Lymph node status was the strongest sole prognostic indicator but the use of NPI gave more accurate prognostic information than node status alone.
|
|
| 3. |
- Sundquist, Marie, et al.
(författare)
-
A comparison between flow cytometric assessment of S-phase fraction and Nottingham histologic grade as prognostic instruments in breast cancer
- 2000
-
Ingår i: Breast Cancer Research and Treatment. - 0167-6806 .- 1573-7217. ; 63:1, s. 11-15
-
Tidskriftsartikel (refereegranskat)abstract
- Flow cytometric DNA analysis with assessment of S-phase fraction and DNA ploidy was compared to Nottingham histologic grade. The study population consisted of 654 patients who presented between 1987 and 1996 with primary operable breast cancer and whose tumours had been analysed for S-phase fraction and DNA ploidy at the time of surgery. Grade, tumour size, node status, steroid receptor status, age, S-phase fraction and DNA ploidy were analysed univariately and multi-variately in a Cox proportional hazard analysis. In the univariate analyses all parameters were statistically significantly associated with breast cancer mortality during the follow-up period of 2–11 years. The most powerful predictor of death from breast cancer in the multiple regression analysis was grade. Patients with grade 1 tumours have excellent prognosis. We conclude that tumour grade is a strong prognostic indicator applicable to all breast cancer patients, regardless of size and nodal status, and advocate its general use.
|
|
| 4. |
- Sundquist, Marie, et al.
(författare)
-
Indicators of loco-regional recurrence in breast cancer
- 2000
-
Ingår i: European Journal of Surgical Oncology. - : Elsevier BV. - 0748-7983 .- 1532-2157. ; 26:4, s. 357-362
-
Tidskriftsartikel (refereegranskat)abstract
- Aim: The aim of the investigation was to contribute to the identification of patients who have increased or decreased risk of loco-regional recurrence.Methods: Six hundred and twenty-nine consecutive patients with primary breast cancer diagnosed between 1988 and 1990 were studied. Two-thirds of the patients underwent mastectomy. Radiotherapy was administered if patients were node positive or breast conserved. The Nottingham histological grading protocol was used and presence of lymphovascular invasion was assessed. Investigated parameters were: age, size, grade, steroid receptor content, surgical radicality, vascular invasion and nodal status. Statistically significant risk factors for loco-regional recurrence using univariate or Cox proportional hazard analysis were grade and lymphovascular invasion.Results: Women with grade 1-2, node-negative tumours without vascular invasion had a very low loco-regional recurrence rate - 3.1%. Seventeen percent of patients with grade 3 tumours and vessel invasion had loco-regional recurrence.Conclusions: Our findings, and those of others, indicate that the use of adjuvant radiotherapy should be influenced to a greater extent by grade and lymphovascular invasion.
|
|
