Publications by authors named "Blomqvist C"

Background/aim: Almost half of all patients with soft-tissue sarcoma are over 65 years of age, and the proportion of older patients is increasing. Despite this, they have been underrepresented in clinical trials and only limited data are available to guide treatment decisions. The aim of this study was to investigate treatment patterns and outcomes in older patients with soft-tissue sarcoma.

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Purpose: We aimed to provide long-term bone mineral density (BMD) data on early breast cancer patients of the BREX (Breast Cancer and Exercise) study. The effects of exercise and adjuvant endocrine treatment 10 years after randomization were analyzed, with special emphasis on aromatase inhibitor (AI) therapy discontinuation at 5 years.

Methods: The BREX study randomized 573 pre- and postmenopausal breast cancer patients into a 1-year supervised exercise program or a control group.

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Ultra-low-dose computed tomography (ULD-CT) may combine the high sensitivity of conventional computed tomography (CT) in detecting sarcoma pulmonary metastasis, with a radiation dose in the same magnitude as chest X-ray (CXR). Fifty patients with non-metastatic high-grade soft tissue sarcoma treated with curative intention were recruited. Their follow-up involved both CXR and ULD-CT to evaluate their different sensitivity.

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Background: Population-based cancer quality registries are of great importance for the improvement of cancer care. However, little is known about the quality of recurrence data in cancer quality registries. The aim of this study was to evaluate data quality in the regional Breast Cancer Quality Registry of Central Sweden, with emphasis on the validity of recorded information on recurrence.

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Introduction: Observational studies suggest that breast conserving surgery (BCS) and radiotherapy (RT) offers superior survival compared to mastectomy. The aim was to compare patient and tumour characteristics in women with invasive breast cancer ≤30 mm treated with either BCS or mastectomy, and to explore the underlying reason for choosing mastectomy.

Methods: Women registered with breast cancer ≤30 mm and ≤4 positive axillary lymph nodes in the Swedish National Breast Cancer Register 2013-2016 were included.

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In search of novel breast cancer (BC) risk variants, we performed a whole-exome sequencing and variant analysis of 69 Finnish BC patients as well as analysed loss-of-function variants identified in DNA repair genes in the Finns from the Genome Aggregation Database. Additionally, we carried out a validation study of SERPINA3 c.918-1G>C, recently suggested for BC predisposition.

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Background: Breast angiosarcoma is a rare disease mostly observed in breast cancer (BC) patients who have previously received radiotherapy (RT). Little is known about angiosarcoma aetiology, management, and outcome. The study aim was to estimate risk and to characterize breast angiosarcoma in a Swedish population-based cohort.

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Article Synopsis
  • The study examined the levels of serum estradiol (E2) and estrone (E1) in postmenopausal breast cancer patients undergoing letrozole treatment and investigated how these hormones relate to quality of life (QoL) and side effects.
  • Out of 100 patients screened, 90 completed the trial, revealing that letrozole effectively suppressed E2 and E1 levels, while side effects like joint pain and muscle aches increased during treatment.
  • The findings indicate that high baseline E2 levels were linked to increased joint and muscle pain, and highlight that traditional immunoassays are not effective for monitoring E2 during letrozole therapy due to sensitivity issues.
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  • The study analyzed patient preferences and quality of life regarding follow-up methods for early breast cancer, comparing phone calls with a digital solution (Noona) after primary treatment.
  • A total of 142 eligible patients participated in the study, with 40% preferring phone calls, 30% favoring the digital solution, and 30% seeing both as equivalent.
  • Results showed no significant differences in health-related quality of life or overall satisfaction, but patients did appreciate the quicker response time associated with the digital method, indicating a potential benefit in including digital solutions in post-treatment surveillance.
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  • A study evaluated the PREDICT v 2.2 tool for predicting the prognosis of breast cancer in patients with BRCA1 and BRCA2 gene variants, using data from over 5,400 carriers across two major cancer research consortia.
  • The PREDICT model showed reasonable effectiveness in distinguishing high-mortality groups for estrogen receptor (ER)-negative breast cancer in BRCA1 carriers, while for BRCA2 carriers, its accuracy was lower and fluctuated based on tumor characteristics.
  • The findings suggest that while PREDICT can aid in management of breast cancer patients, adjustments for BRCA2 status and tumor features are necessary to improve prognosis estimates, particularly for ER-positive cases.
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Background: The quality of surgical margins is the most important factor affecting local control in soft tissue sarcoma (STS). Despite this, there is no universally accepted consensus on the definition of an adequate surgical margin or on which patients should be offered radiation therapy. This study focuses on local control and its prognostic factors in patients with trunk wall and extremity STS.

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Background: Most sarcomas metastasize predominantly to the lungs, and chest x-ray, or computed tomography, is the most commonly used staging investigation. Myxoid liposarcomas (MLSs) are rare tumors with a tendency to metastasize to extrapulmonary loci. The aim of this study was to assess the locations of the first metastases in MLS patients, to guide the design of effective staging and follow-up imaging protocols.

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  • - The study investigated the links between genetic variants in breast cancer susceptibility genes (besides BRCA1, BRCA2, and CHEK2) and risks of developing contralateral breast cancer (CBC) and breast cancer-specific survival (BCSS) in 34,401 women of European ancestry who had been diagnosed with breast cancer.
  • - Significant findings revealed that protein-truncating variants (PTVs) and certain missense variants (MSVs) in genes like BRCA1, BRCA2, TP53, CHEK2, and PALB2 were associated with higher CBC risk and negative impacts on BCSS, indicating that these genetic factors play a crucial role in cancer outcomes.
  • - The results showed minimal
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Background: Low-frequency variants play an important role in breast cancer (BC) susceptibility. Gene-based methods can increase power by combining multiple variants in the same gene and help identify target genes.

Methods: We evaluated the potential of gene-based aggregation in the Breast Cancer Association Consortium cohorts including 83,471 cases and 59,199 controls.

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Recurrent pathogenic variants have been detected in several breast and ovarian cancer (BC/OC) risk genes in the Finnish population. We conducted a gene-panel sequencing and copy number variant (CNV) analysis to define a more comprehensive spectrum of pathogenic variants in , , , , , , , , , and genes in Finnish BC patients. The combined frequency of pathogenic variants in the genes was 1.

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Background: Metaplastic breast cancer (MpBC) is an aggressive subtype of breast carcinoma that is often resistant to conventional chemotherapy. Therefore, novel treatment strategies are urgently needed. Immune check point inhibitors have shown activity in programmed death-ligand 1 (PD-L1) - positive metastatic triple negative breast carcinoma (TNBC), which raises the possibility that immunotherapy may also be effective in MpBC as most of the MpBCs are triple negative.

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  • - The study investigates the causal relationship between physical activity, sedentary behavior, and breast cancer risk using Mendelian randomization, analyzing data from over 130,000 European women.
  • - Findings suggest that higher levels of genetic predisposition to physical activity are linked to a significantly lower overall breast cancer risk, particularly for pre/perimenopausal cases, while increased sedentary time correlates with a higher risk of certain types of tumors.
  • - The results are consistent across various test groups and indicate that promoting physical activity and reducing sedentary behavior might be beneficial in mitigating breast cancer risks.
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Background: Prediction of contralateral breast cancer (CBC) risk is challenging due to moderate performances of the known risk factors. We aimed to improve our previous risk prediction model (PredictCBC) by updated follow-up and including additional risk factors.

Methods: We included data from 207,510 invasive breast cancer patients participating in 23 studies.

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Purpose: To investigate if molecular subtype is associated with outcome in stage 1 breast cancer (BC).

Methods: Tissue samples from 445 women with node-negative BC ≤ 15 mm, treated in 1986-2004, were classified into surrogate molecular subtypes [Luminal A-like, Luminal B-like (HER2-), HER2-positive, and triple negative breast cancer (TNBC)]. Information on treatment, recurrences, and survival were gathered from medical records.

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Background: The benefits of exercise training are well documented among breast cancer (BC) survivors. Patients decrease their physical activity during treatment, and many fail to regain their previous exercise levels. There is therefore a need to define factors supporting long-term physical activity behavior in this patient group, to target supporting interventions aimed at preventing the decline in physical activity (PA).

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Background: Ki-67 is a widely used proliferation marker reflecting prognosis in various tumors. However, visual assessment and scoring of Ki-67 suffers from marked inter-observer and intra-observer variability. We aimed to assess the concordance of manual counting and automated image-analytic scoring methods for Ki-67 in synovial sarcoma.

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Purpose: Adjuvant radiotherapy (RT) for breast cancer is associated with an increased risk of ischemic heart disease. We examined the risk of coronary artery stenosis in a large cohort of women with breast cancer receiving adjuvant RT.

Methods: A cohort of women diagnosed with breast cancer between 1992 and 2012 in three Swedish health care regions (n = 57,066) were linked to the Swedish Coronary Angiography and Angioplasty Registry (SCAAR) to identify women receiving RT who subsequently underwent a percutaneous coronary intervention (PCI) due to coronary stenosis.

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