Publications by authors named "Allison Sigler"

Anxiety and depression are common in many cancers but have not been systematically studied in patients with histiocytic neoplasms (HN). We sought to estimate rates of anxiety and depression and identify clinical features and patient-reported outcomes (PROs) associated with anxiety and depression in patients with HN. A registry-based cohort of patients with HN completing PROs including the Hospital Anxiety and Depression Scale (HADS) from 2018-2023 was identified.

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Article Synopsis
  • The study explores the potential of using circulating tumor DNA (ctDNA) found in plasma as a noninvasive diagnostic tool for ocular-involving histiocytosis, a condition marked by cancer-driven histiocyte expansion.
  • Conducted at a tertiary cancer center, the research involved 24 adult patients, focusing on detecting specific genetic mutations associated with histiocytosis through ctDNA sequencing methods.
  • Results showed that ctDNA sequencing successfully identified known driver mutations in 14 patients, demonstrating high concordance with mutations found via traditional tumor sequencing, which suggests ctDNA could streamline the diagnostic process.
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Article Synopsis
  • Caregivers of patients with rare cancers like Erdheim-Chester disease have a lot of unmet needs, especially for information and emotional support.* -
  • Most caregivers feel stressed and anxious, which makes it harder for them to find joy and meaning in their caregiving role.* -
  • The study shows that helping caregivers with their needs could make their experience better and help them see the positive sides of caring for someone with a rare cancer.*
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Background: Accurate Sezary cell detection in peripheral blood of mycosis fungoides/Sezary syndrome (MF/SS) patients by flow cytometry can be difficult due to overlapping immunophenotypes with normal T cells using standard markers. We assessed the utility of programmed death-1 (PD-1/CD279), a transmembrane protein expressed in some hematopoietic cells, for identification and quantitation of circulating Sezary cells among established markers using flow cytometry.

Methods: 50 MF/SS and 20 control blood samples were immunophenotyped by flow cytometry.

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Purpose: Glioblastoma (GBM) is a devastating neuro-oncologic disease with invariably poor prognosis. Despite this, research shows patients have unrealistic perceptions of their prognosis, which may relate in part to communication patterns between patients, caregivers and oncologists. The purpose of this study was to examine communication processes and goals among patients, caregivers, and oncologists to elucidate drivers of prognostic understanding (PU) in the context of recurrent GBM.

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Background: Lineage infidelity is characteristic of mixed phenotype acute leukemia and is also seen in blast phase of chronic myeloid leukemia (CML), myeloid/lymphoid neoplasia with eosinophilia and gene rearrangements, and subtypes of acute myeloid leukemia. Driver genetic events often occur in multipotent progenitor cells in myeloid neoplasms, suggesting that multilineage output may be more common than appreciated. This phenomenon is not well studied in myelodysplastic syndrome (MDS) and non-CML myeloproliferative neoplasms (MPN).

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Background: Management of patients with brain tumors can lead to ethical and decisional dilemmas. The aim of this study was to characterize ethical conflicts encountered in neuro-oncologic patients.

Methods: Retrospective review of ethics consultations performed upon patients with primary and metastatic brain tumors at a tertiary cancer center.

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Context.—: The diagnosis of classic Hodgkin lymphoma (CHL) traditionally requires surgical tissue biopsy because of the paucity of diagnostic Hodgkin and Reed-Sternberg cells. Diagnosis can be challenging in small core needle and cytologic biopsies, which are increasingly used because of reduced costs and minimal invasiveness.

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Objectives: The aim of this study was to [1] characterize distribution of Erdheim-Chester Disease (ECD) by F-FDG PET/CT and [2] determine the utility of metabolic (F-FDG PET/CT) imaging versus anatomic imaging (CT or MRI) in evaluating ECD patients for clinical trial eligibility.

Methods: F-FDG PET/CT and corresponding CT or MRI studies for ECD patients enrolled in a prospective registry study were reviewed. Sites of disease were classified as [1] detectable by F-FDG PET only, CT/MRI only, or both and as [2] measurable by modified PERCIST (mPERCIST) only, RECIST only, or both.

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Background: The median overall survival of patients with high-risk myelodysplastic syndromes refractory to hypomethylating agents is less than 6 months. Currently, no standard therapy for such patients exists. Preclinical studies have shown that inhibition of the nuclear export protein exportin 1 (XPO1) causes nuclear accumulation of p53 and disruption of NF-κB signalling, both relevant targets for myelodysplastic syndromes.

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TET2 and DNMT3A mutations are frequently identified in T-cell lymphomas of T follicular helper cell origin (TCL-TFH), clonal hematopoiesis (CH), and myeloid neoplasms (MNs). The relationships among these 3 entities, however, are not well understood. We performed comprehensive genomic studies on paired bone marrow and tissue samples as well as on flow cytometry-sorted bone marrow and peripheral blood subpopulations from a cohort of 22 patients with TCL-TFH to identify shared CH-type mutations in various hematopoietic cell compartments.

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In patients with multiple myeloma, plasmablastic transformation in the bone marrow is rare and associated with poor outcomes. The significance of discordant extramedullary plasmablastic transformation in patients with small, mature clonal plasma cells in the bone marrow has not been well studied. Here, we report the clinicopathologic, cytogenetic, and molecular features of 10 such patients (male/female: 6/4, median age: 65 y, range: 48 to 76 y) with an established diagnosis of multiple myeloma in the bone marrow composed of small, mature plasma cells in parallel with a concurrent or subsequent extramedullary plasmablastic transformation.

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TAFRO syndrome, a clinical subtype of idiopathic multicentric Castleman disease (iMCD), consists of a constellation of symptoms/signs including thrombocytopenia, anasarca, fever, reticulin fibrosis/renal dysfunction, and organomegaly. The etiology of iMCD-TAFRO and the basis for cytokine hypersecretion commonly seen in iMCD-TAFRO patients has not been elucidated. Here, we identified a somatic MEK2 mutation and a germline RUNX1 mutation in two patients with iMCD-TAFRO, respectively.

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