Publications by authors named "Abrahamsson J"

Article Synopsis
  • Several genomic subsets of mutations in acute myeloid leukemia (AML) patients were studied to understand their impact on outcomes and the underlying biology, revealing that type D mutations correlated with poorer survival rates compared to other types.
  • In a cohort of over 4,000 patients, a study found that those with type A, B, and rare variants had more favorable overall survival rates, while type D patients exhibited significantly worse outcomes.
  • The research highlighted that codon optimality in type D mutations affects gene expression and translation efficiency, leading to poorer prognostic implications and indicating the need for a potential reclassification of type D patients to higher-risk groups.
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  • Acute myeloid leukemia (AML) with the t(7;12) translocation is common in infants and has been recognized by the WHO, although the exact mechanism behind its development is unclear.
  • A study of 12 pediatric AML cases with this translocation found no significant difference in survival rates compared to other AML types, but noted a consistent high expression of MNX1 across all cases.
  • Whole transcriptome and genome sequencing revealed various fusion transcripts, primarily involving NOM1, but emphasized the importance of MNX1's overexpression as the key driving factor in this AML subtype.
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Purpose: Cisplatin-based combination chemotherapy (CHT) is standard of care in metastatic urothelial cancer (mUC); however, no predictive molecular biomarkers are available for clinical use. The aim of this study was to investigate the impact of molecular subtypes in relation to treatment response and survival in patients with mUC treated with first-line CHT.

Patients And Methods: Molecular subtype classification according to the Lund Taxonomy (LundTax) was performed by tumor transcriptomic profiling and immunostaining in a retrospective cohort.

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Aim: To study Swedish pediatric oncologists' practical and emotional experiences of referring, including and/or treating children in early-phase clinical trials.

Methods: A nationwide study was conducted using a mixed-method approach. Structured interviews based on a study-specific questionnaire and participants' personal reflections were utilized.

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Antibiotic resistance is an increasing challenge for the human pathogen Staphylococcus aureus. Methicillin-resistant S. aureus (MRSA) clones have spread globally, and a growing number display decreased susceptibility to vancomycin, the favoured antibiotic for treatment of MRSA infections.

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Objective: Disease recurrence, particularly intravesical recurrence (IVR) after radical nephroureterectomy (RNU) for upper tract urothelial carcinoma (UTUC), is common. We investigated whether violations of onco-surgical principles before or during RNU, collectively referred to as surgical violation (SV), were associated with survival outcomes.  Material and methods: Data from a consecutive series of patients who underwent RNU for UTUC 2001-2012 at Skåne University Hospital Lund/Malmö were collected.

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Hyperleukocytosis in pediatric acute myeloid leukemia (AML) is associated with severe complications and an inferior outcome. We report results on patients with hyperleukocytosis included in the NOPHO-DBH AML 2012 study. We recommended immediate initiation of full-dose chemotherapy (etoposide monotherapy for 5 days as part of the first course), avoiding leukapheresis and prephase chemotherapy.

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Article Synopsis
  • * Three new recurring KMT2A-rearranged groups were identified, and a significant variation in 5-year event-free survival rates was observed across 13 different groups, highlighting the impact of genetic factors on patient outcomes.
  • * The research suggests incorporating five specific adverse-risk KMT2A fusions into current risk stratification models and calls for further studies to confirm the associations
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Purpose: Measurable residual disease (MRD) by using flow cytometry after induction therapy is strongly prognostic in pediatric AML, and hematopoietic stem-cell transplant (hSCT) may counteract a poor response. We designed a phase III study with intensified response-guided induction and MRD-based risk stratification and treated poor induction response with hSCT. The efficacy of liposomal daunorubicin (DNX) in induction was compared with mitoxantrone.

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Allopurinol can be used in maintenance therapy (MT) for pediatric acute lymphoblastic leukemia (ALL) to mitigate hepatic toxicity in patients with skewed 6-mercaptopurine metabolism. Allopurinol increases the erythrocyte levels of thioguanine nucleotides (e-TGN), which is the proposed main mediator of the antileukemic effect and decreases methyl mercaptopurine (e-MeMP) levels, associated with hepatotoxicity. We investigated the effects of allopurinol in thiopurine methyltransferase (TPMT) wild-type patients without previous clinical signs of skewed 6-mercaptopurine metabolism.

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  • Limited information exists on lymph node metastases (LNMs) in upper tract urothelial carcinoma (UTUC), prompting a study to analyze their location and complications post-surgery.
  • Conducted across multiple Nordic hospitals, the study involved patients with advanced UTUC, who underwent radical nephroureterectomy and lymph node dissection with specific templates for each side.
  • Results indicated LNMs in about 23% of patients, with higher rates on the right side, and only a few experienced serious complications within 90 days, suggesting the templates effectively captured most LNMs without significant risks.
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Urothelial cancer of the urinary bladder frequently metastasizes to lymph-nodes, lungs, liver and bone. A taxonomy for molecular classification exists, but it is unknown if molecular subtypes show tropism for different organs. Here, we study 146 patients with de novo metastatic disease or recurrence after curative treatment.

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Background: F-Fluorodeoxyglucose positron emission combined with computed tomography (FDG-PET/CT) has been proposed to improve preoperative staging in patients with bladder cancer subjected to radical cystectomy (RC).

Objective: Our aim was to assess the accuracy of FDG-PET/CT for lymph node staging ascertained at the multidisciplinary tumour board compared to lymph node status in the surgical lymphadenectomy specimen obtained at RC, and to explore potential factors associated with false-positive FDG-PET/CT results.

Design, Setting And Participants: Consecutive patients with bladder cancer undergoing RC with extended lymph node dissection between 2011 and 2019 without preoperative chemotherapy in a tertial referral cystectomy unit were included in the study.

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Article Synopsis
  • - The study examines the clinical presentation and outcomes of 33 patients with suspected urosymphyseal fistula (USF) following pelvic radiotherapy, focusing on diagnostic delays, symptoms, and treatment results over a median follow-up of 22 months.
  • - Out of the 24 patients diagnosed with USF, the majority were elderly males, with local pain being the most common symptom, while a significant number faced delays in diagnosis and had complications, including osteomyelitis.
  • - The findings suggest that endourologic procedures in patients who have received pelvic radiotherapy should be handled with care due to associated risks and potential complications.
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Article Synopsis
  • A study by the I-BFM-SG on childhood rearranged acute myeloid leukemia (AML) revealed that the type of fusion partner plays a significant role in prognosis, and it also explored the effectiveness of flow cytometry-based measurable residual disease (flow-MRD) and allogeneic stem-cell transplantation (allo-SCT) in improving outcomes during first complete remission.
  • The research involved 1,130 children diagnosed with rearranged AML, who were categorized into high-risk and non-high-risk groups based on their fusion partners, and it focused on the relationship between flow-MRD levels and long-term survival rates.
  • Results showed that the high-risk group had significantly worse event-free survival, cumulative incidence of relapse, and overall survival
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  • A study investigated 66 children with resistant acute myeloid leukaemia (AML) from a larger cohort, revealing that older age (10 years+) and high white-blood-cell counts at diagnosis are significant risk factors for resistant disease.
  • The five-year overall survival rate for these patients was found to be only 38%, but among those who achieved complete remission (CR) after salvage chemotherapy, the survival rate rose to 57%.
  • The study concluded that nearly 40% of children with primary resistant AML can be successfully treated with salvage therapy followed by allogeneic stem cell transplantation, but additional chemotherapy after two unsuccessful attempts did not improve outcomes.
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Measurement of canine pancreatic lipase immunoreactivity (cPLI) is used for diagnosing pancreatitis in dogs. Because pancreatitis can be a life-threatening disease with severe complications, an in-house cPLI test would be valuable to obtain rapid test results. The aim of this study was to evaluate a point-of-care cPLI test, Vcheck cPL.

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Despite improvement of current treatment strategies and novel targeted drugs, relapse and treatment resistance largely determine the outcome for acute myeloid leukemia (AML) patients. To identify the underlying molecular characteristics, numerous studies have been aimed to decipher the genomic- and transcriptomic landscape of AML. Nevertheless, further molecular changes allowing malignant cells to escape treatment remain to be elucidated.

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Background: Bladder cancer is molecularly one of the most heterogenous malignancies characterized by equally heterogenous clinical outcomes. Standard morphological assessment with pathology and added immunohistochemical analyses is unable to fully address the heterogeneity, but up to now treatment decisions have been made based on such information only. Bladder cancer molecular subtypes will likely provide means for a more personalized bladder cancer care.

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  • Hypodiploidy, characterized by a low modal number of chromosomes (45 or lower), is a known high-risk factor in pediatric acute lymphoblastic leukemia but hasn't been studied in pediatric acute myeloid leukemia (AML) until now.
  • This study analyzed data from 81 children under 18 with hypodiploid karyotypes diagnosed with AML, finding that more severe hypodiploidy (modal numbers ≤ 44) led to significantly worse event-free survival (EFS) and overall survival (OS) rates compared to those with a modal number of 45.
  • The results highlight that pediatric hypodiploid AML is a rare but challenging subgroup with poor prognosis, as even treatments like allogeneic
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Introduction: Pediatric acute myeloid leukemia (AML) is the second most common type of pediatric leukemia. Patients with AML are at high risk for several complications such as infections, typhlitis, and acute and long-term cardiotoxicity. Despite this knowledge, there are no definite supportive care guidelines as to what the best approach is to manage or prevent these complications.

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Cerebral sinovenous thrombosis (CSVT) is a serious complication during asparaginase therapy in patients with acute lymphoblastic leukaemia (ALL). We identified 46 patients with CSVT among 2651 patients (1‒45 years) treated according to the Nordic Society of Paediatric Haematology and Oncology (NOPHO) ALL2008 protocol between 2008 and 2018. CSVT cases were prospectively registered in the NOPHO database with retrospective updates.

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Introduction: Analysis of measurable residual disease (MRD) is increasingly being implemented in the clinical care of children and adults with acute myeloid leukaemia (AML). However, MRD methodologies differ and discordances in results lead to difficulties in interpretation and clinical decision-making. The aim of this study was to compare results from reverse transcription quantitative polymerase chain reaction (RT-qPCR) and multiparameter flow cytometry (MFC) in childhood AML and describe the kinetics of residual leukaemic burden during induction treatment.

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Article Synopsis
  • This study investigates genetic abnormalities in pediatric acute myeloid leukemia (AML) to enhance understanding of the disease and aid in risk stratification and treatment outcomes.* -
  • A cohort of 161 patients underwent molecular profiling, revealing rearrangements in 45% of cases analyzed, including novel mutations related to ERG and NPM1 genes, which are associated with certain characteristics of AML.* -
  • The findings suggest that integrating these advanced genetic testing methods into standard diagnostic protocols could significantly impact clinical care and understanding of pediatric AML.*
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