Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 14 de 14
Filter
1.
Cardiovasc Intervent Radiol ; 47(2): 238-244, 2024 Feb.
Article in English | MEDLINE | ID: mdl-37985479

ABSTRACT

PURPOSE: There are limited existing data on the lymphatic anatomy of patients with primary lymphedema (LED), which is caused by aberrant development of lymphatic channels. In addition, there is a paucity of contemporary studies that use groin intranodal lymphangiography (IL) to evaluate LED anatomy. The purpose of this retrospective observational study was to better delineate the disease process and anatomy of primary LED using groin IL. MATERIALS AND METHODS: We identified common groin IL findings in a cohort of 17 primary LED patients performed between 1/1/2017 and 1/31/2022 at a single institution. These patients were clinically determined to have primary lymphedema and demonstrated associated findings on lower extremity MR and lymphoscintigraphy. RESULTS: Ten patients (59%) demonstrated irregular lymph node morphology or a paucity of lymph nodes on the more symptomatic laterality. Eight patients (47%) demonstrated lymphovenous shunting from pre-existing anastomoses between the lymphatic and venous systems. Eight patients (47%) demonstrated passage of contrast past midline to the contralateral lymphatics. Finally, 12 patients (71%) failed to opacify the cisterna chyli and thoracic duct on their initial lymphangiograms. Delayed computed tomography of 3 patients showed eventual central lymphatic opacification up to the renal veins, but none of these patients showed central lymphatic opacification to the thorax. CONCLUSION: This descriptive, exploratory study demonstrates common central groin IL findings in primary LED to highlight patterns interventional radiologists should identify and report when addressing primary LED.


Subject(s)
Lymphatic Vessels , Lymphedema , Humans , Lymph Nodes , Lymphatic System , Lymphedema/diagnostic imaging , Lymphedema/therapy , Lymphedema/pathology , Lymphography/methods , Retrospective Studies
2.
J Pers Med ; 10(3)2020 Sep 21.
Article in English | MEDLINE | ID: mdl-32967100

ABSTRACT

Rapidly progressive hepatocellular carcinoma (RPHCC) is a subset of hepatocellular carcinoma that demonstrates accelerated growth, and the radiographic features of RPHCC versus non-RPHCC have not been determined. The purpose of this retrospective study was to use baseline radiologic features and texture analysis for the accurate detection of RPHCC and subsequent improvement of clinical outcomes. We conducted a qualitative visual analysis and texture analysis, which selectively extracted and enhanced imaging features of different sizes and intensity variation including mean gray-level intensity (mean), standard deviation (SD), entropy, mean of the positive pixels (MPP), skewness, and kurtosis at each spatial scaling factor (SSF) value of RPHCC and non-RPHCC tumors in a computed tomography (CT) cohort of n = 11 RPHCC and n = 11 non-RPHCC and a magnetic resonance imaging (MRI) cohort of n = 13 RPHCC and n = 10 non-RPHCC. There was a statistically significant difference across visual CT irregular margins p = 0.030 and CT texture features in SSF between RPHCC and non-RPHCC for SSF-6, coarse-texture scale, mean p = 0.023, SD p = 0.053, MPP p = 0.023. A composite score of mean SSF-6 binarized + SD SSF-6 binarized + MPP SSF-6 binarized + irregular margins was significantly different between RPHCC and non-RPHCC (p = 0.001). A composite score ≥3 identified RPHCC with a sensitivity of 81.8% and specificity of 81.8% (AUC = 0.884, p = 0.002). CT coarse-texture-scale features in combination with visually detected irregular margins were able to statistically differentiate between RPHCC and non-RPHCC. By developing an image-based, non-invasive diagnostic criterion, we created a composite score that can identify RPHCC patients at their early stages when they are still eligible for transplantation, improving the clinical course of patient care.

4.
Int J Radiat Oncol Biol Phys ; 104(4): 724-733, 2019 07 15.
Article in English | MEDLINE | ID: mdl-30557675

ABSTRACT

PURPOSE: Proton therapy is increasingly prescribed for cancer treatment, given its potential for improvements in clinical outcomes and toxicity reduction; however, insurance coverage continues to be a barrier to patient access. This study examined insurance approval and appeal outcomes at a large-volume proton therapy center to clarify the process and identify areas for improvement. METHODS AND MATERIALS: In 2013 to 2016, 1753 patients with thoracic or head and neck cancer were considered for proton therapy; 903 (553 thoracic, 350 head and neck) entered the insurance process. Rates of and times to approval and successful appeal after initial denial were calculated. Clinical factors were evaluated for association with insurance outcomes via logistic regression. RESULTS: Approval rates by Medicare (n = 538) and private insurance (n = 365) were 91% and 30% on initial request, at a median 3 days and 14 days from inquiry to determination. Of the 306 patients initially denied coverage, 276 appealed the decision, and denial was overturned for 189 patients (68%; median time, 21 days from initial inquiry). On multivariable analysis, Medicare (odds ratio [OR], 14.20; P < .001) was the strongest predictor of initial approval. Approval rates decreased from 2013 to 2014 versus 2015 to 2016 (OR 0.54; P = .001). For patients who appealed denial, multivariable analysis found no associations between approval and trial enrollment or tumor type. Submission of a comparison treatment plan (proton vs photon) indicating dosimetric advantage to normal tissues was associated with decreased likelihood of approval (OR 0.43; P = .006), as was a prescribed dose of ≥66 Gy (OR 0.48; P = .019). CONCLUSIONS: Despite an 87% ultimate approval rate for proton therapy, the insurance process is a resource-intensive barrier to patient access associated with significant time delays to cancer treatment. These findings, plus the lack of clinical correlates with insurance outcomes, highlight a need for increased efficiency, transparency, and collaboration among stakeholders to promote timely patient care and research.


Subject(s)
Head and Neck Neoplasms/radiotherapy , Insurance Claim Review/statistics & numerical data , Insurance Coverage/statistics & numerical data , Insurance, Health, Reimbursement/statistics & numerical data , Proton Therapy/economics , Thoracic Neoplasms/radiotherapy , Time-to-Treatment/statistics & numerical data , Adult , Aged , Aged, 80 and over , Female , Humans , Male , Medicare/statistics & numerical data , Middle Aged , Prior Authorization/statistics & numerical data , Proton Therapy/statistics & numerical data , Randomized Controlled Trials as Topic/statistics & numerical data , Regression Analysis , Retrospective Studies , United States , Young Adult
5.
Clin Lung Cancer ; 19(4): e517-e528, 2018 07.
Article in English | MEDLINE | ID: mdl-29685701

ABSTRACT

INTRODUCTION: A previous study showed that use of positron emission tomography (PET)/computed tomography (CT) for surveillance after treatment of non-small-cell lung cancer (NSCLC) does not yield a detection or survival benefit over the use of chest CT. However, PET/CT remains a common method of follow-up imaging. Here we estimated and compared the costs of PET/CT versus CT for surveillance of patients with stage III NSCLC and identified patient and provider demographic characteristics associated with preference for use of PET/CT. PATIENTS AND METHODS: We reviewed 178 patients with stage III NSCLC who had received ≥ 1 PET/CT scan within 6 months of completing radiotherapy (n = 89) or had received CT after radiotherapy (n = 89) from 2000 to 2011. Costs were measured according to Medicare payments converted from institutional billing records. Total and imaging costs were analyzed at 6, 12, 18, and 24 months after the end of treatment. Patient and provider demographic characteristics were also evaluated for potential associations with PET/CT use. RESULTS: Total costs in the PET/CT group were higher during the first 18 months after treatment (P = .002 at 6 months, P = .019 at 12 months, and P = .018 at 18 months) but was marginally significant (P = .05) at 24 months. In univariate analysis of demographic variables, patients who lived in a state different from the treatment center might have been more likely to receive PET/CT (odds ratio [OR], 1.76; P = .051). In multivariate analysis, patients treated in 2007 to 2010 (OR, 29.9; P < .001) or 2003 to 2006 (OR, 11.6; P = .002) were more likely to receive PET/CT than patients treated in 1999 to 2002. In addition, radiation oncologists with > 10 years of experience were more likely to use PET/CT than those with less experience, although this result might be confounded by the small number of providers. CONCLUSION: Use of PET/CT was associated with higher costs for 18 months after treatment, but the difference was at the borderline of statistical significance at 24 months.


Subject(s)
Carcinoma, Non-Small-Cell Lung/diagnostic imaging , Lung Neoplasms/diagnostic imaging , Neoplasm Recurrence, Local/diagnostic imaging , Positron Emission Tomography Computed Tomography/economics , Tomography, X-Ray Computed/economics , Adult , Aged , Carcinoma, Non-Small-Cell Lung/radiotherapy , Costs and Cost Analysis , Female , Humans , Lung Neoplasms/radiotherapy , Male , Middle Aged
6.
Cell ; 173(4): 879-893.e13, 2018 05 03.
Article in English | MEDLINE | ID: mdl-29681456

ABSTRACT

Triple-negative breast cancer (TNBC) is an aggressive subtype that frequently develops resistance to chemotherapy. An unresolved question is whether resistance is caused by the selection of rare pre-existing clones or alternatively through the acquisition of new genomic aberrations. To investigate this question, we applied single-cell DNA and RNA sequencing in addition to bulk exome sequencing to profile longitudinal samples from 20 TNBC patients during neoadjuvant chemotherapy (NAC). Deep-exome sequencing identified 10 patients in which NAC led to clonal extinction and 10 patients in which clones persisted after treatment. In 8 patients, we performed a more detailed study using single-cell DNA sequencing to analyze 900 cells and single-cell RNA sequencing to analyze 6,862 cells. Our data showed that resistant genotypes were pre-existing and adaptively selected by NAC, while transcriptional profiles were acquired by reprogramming in response to chemotherapy in TNBC patients.


Subject(s)
Antineoplastic Agents/therapeutic use , Drug Resistance, Neoplasm/genetics , High-Throughput Nucleotide Sequencing , Triple Negative Breast Neoplasms/drug therapy , Case-Control Studies , Cluster Analysis , DNA Copy Number Variations , Exome/genetics , Female , Gene Frequency , Genotype , Humans , Neoadjuvant Therapy , Sequence Analysis, DNA , Sequence Analysis, RNA , Single-Cell Analysis , Survival Analysis , Transcriptome , Triple Negative Breast Neoplasms/metabolism , Triple Negative Breast Neoplasms/mortality , Triple Negative Breast Neoplasms/pathology
7.
Nat Commun ; 8(1): 228, 2017 08 09.
Article in English | MEDLINE | ID: mdl-28794488

ABSTRACT

Single cell RNA sequencing has emerged as a powerful tool for resolving transcriptional diversity in tumors, but is limited by throughput, cost and the ability to process archival frozen tissue samples. Here we develop a high-throughput 3' single-nucleus RNA sequencing approach that combines nanogrid technology, automated imaging, and cell selection to sequence up to ~1800 single nuclei in parallel. We compare the transcriptomes of 485 single nuclei to 424 single cells in a breast cancer cell line, which shows a high concordance (93.34%) in gene levels and abundance. We also analyze 416 nuclei from a frozen breast tumor sample and 380 nuclei from normal breast tissue. These data reveal heterogeneity in cancer cell phenotypes, including angiogenesis, proliferation, and stemness, and a minor subpopulation (19%) with many overexpressed cancer genes. Our studies demonstrate the utility of nanogrid single-nucleus RNA sequencing for studying the transcriptional programs of tumor nuclei in frozen archival tissue samples.Single cell RNA sequencing is a powerful tool for understanding cellular diversity but is limited by cost, throughput and sample preparation. Here the authors use nanogrid technology with integrated imaging to sequence thousands of cancer nuclei in parallel from fresh or frozen tissue.


Subject(s)
Carcinoma, Ductal, Breast/metabolism , Microfluidic Analytical Techniques , Triple Negative Breast Neoplasms/metabolism , Cell Line, Tumor , Gene Expression Profiling , Humans , Phenotype , Sequence Analysis, RNA , Single-Cell Analysis
8.
Breast Cancer Res ; 19(1): 93, 2017 Aug 15.
Article in English | MEDLINE | ID: mdl-28810913

ABSTRACT

BACKGROUND: Selinexor (KPT-330) is an oral agent that has been shown to inhibit the nuclear exporter XPO1. Given the pressing need for novel therapies for triple-negative breast cancer (TNBC), we sought to determine the antitumor effects of selinexor in vitro and in vivo. METHODS: Twenty-six breast cancer cell lines of different breast cancer subtypes were treated with selinexor in vitro. Cell proliferation assays were used to measure the half-maximal inhibitory concentration (IC50) and to test the effects in combination with chemotherapy. In vivo efficacy was tested both as a single agent and in combination therapy in TNBC patient-derived xenografts (PDXs). RESULTS: Selinexor demonstrated growth inhibition in all 14 TNBC cell lines tested; TNBC cell lines were more sensitive to selinexor (median IC50 44 nM, range 11 to 550 nM) than were estrogen receptor (ER)-positive breast cancer cell lines (median IC50 > 1000 nM, range 40 to >1000 nM; P = 0.017). In multiple TNBC cell lines, selinexor was synergistic with paclitaxel, carboplatin, eribulin, and doxorubicin in vitro. Selinexor as a single agent reduced tumor growth in vivo in four of five different TNBC PDX models, with a median tumor growth inhibition ratio (T/C: treatment/control) of 42% (range 31 to 73%) and demonstrated greater antitumor efficacy in combination with paclitaxel or eribulin (average T/C ratios of 27% and 12%, respectively). CONCLUSIONS: Collectively, these findings strongly suggest that selinexor is a promising therapeutic agent for TNBC as a single agent and in combination with standard chemotherapy.


Subject(s)
Antineoplastic Combined Chemotherapy Protocols/administration & dosage , Cell Proliferation/drug effects , Hydrazines/administration & dosage , Triazoles/administration & dosage , Triple Negative Breast Neoplasms/drug therapy , Animals , Antineoplastic Combined Chemotherapy Protocols/adverse effects , Apoptosis/drug effects , Doxorubicin/administration & dosage , Female , Furans/administration & dosage , Furans/adverse effects , Humans , Hydrazines/adverse effects , Ketones/administration & dosage , Ketones/adverse effects , MCF-7 Cells , Mice , Triazoles/adverse effects , Triple Negative Breast Neoplasms/pathology , Xenograft Model Antitumor Assays
9.
Clin Lung Cancer ; 18(2): 141-148, 2017 03.
Article in English | MEDLINE | ID: mdl-27913215

ABSTRACT

BACKGROUND: There are few data to support the use of varying imaging modalities in evaluating recurrence in non-small-cell lung cancer (NSCLC). We compared the efficacy of surveillance positron emission tomography (PET)/computed tomography (CT) versus CT scans of the chest in detecting recurrences after definitive radiation for NSCLC. MATERIALS AND METHODS: We retrospectively analyzed 200 patients treated between 2000 and 2011 who met the inclusion criteria of stage III NSCLC, completion of definitive radiation treatment, and absence of recurrence within the initial 6 months. These patients were then grouped on the basis of the use of PET/CT imaging during postradiation surveillance. Patients who received ≥ 1 PET/CT scans within 6 months of the end of radiation treatment were placed in the PET group whereas all others were placed in the CT group. We compared survival times from the end of treatment to the date of death or last follow-up using log rank tests. Multivariate analysis was conducted to identify factors associated with decreased survival. RESULTS: In the entire cohort, median event-free survival (EFS) was 26.7 months, and median overall survival (OS) was 41.2 months. The CT group had a median EFS of 21.4 months versus 29.4 months for the PET group (P = .59). There was no difference in OS between the CT and PET groups (median OS of 41.2 and 41.3 months, respectively; P = .59). There was also no difference in local recurrence-free survival or distant metastases-free survival between the CT-only and PET/CT groups (P = .92 and P = .30, respectively). Similarly, in multivariate analysis, stratification into the PET group was not associated with improved EFS (hazard ratio [HR], 0.90; 95% confidence interval [CI], 0.61-1.34; P = .60) or OS (HR, 1.2; 95% CI, 0.83-1.7; P = .34). CONCLUSIONS: In stage III NSCLC patients treated with definitive radiation and without early recurrence, PET/CT scan surveillance did not result in decreased time to detection of locoregional or distant recurrence or improved survival.


Subject(s)
Adenocarcinoma/radiotherapy , Carcinoma, Non-Small-Cell Lung/radiotherapy , Carcinoma, Squamous Cell/radiotherapy , Lung Neoplasms/radiotherapy , Neoplasm Recurrence, Local/diagnostic imaging , Neoplasm Recurrence, Local/diagnosis , Positron Emission Tomography Computed Tomography/methods , Adenocarcinoma/pathology , Adult , Aged , Aged, 80 and over , Carcinoma, Non-Small-Cell Lung/pathology , Carcinoma, Squamous Cell/pathology , Female , Follow-Up Studies , Humans , Lung Neoplasms/pathology , Male , Middle Aged , Neoplasm Staging , Prognosis , Radiotherapy Dosage , Retrospective Studies , Survival Rate
10.
BMJ Case Rep ; 20162016 Oct 26.
Article in English | MEDLINE | ID: mdl-27797838

ABSTRACT

The use of immune checkpoint inhibitors is revolutionising the treatment of cancer. However, their unique toxicity profile is substantially different from what has been observed with traditional chemotherapy, resulting in a novel learning curve for medical oncologists. Early recognition of these toxicities can make a substantial impact in ameliorating these side effects in the oncological and medical-surgical fields. Here, we present a case of Lofgren syndrome sarcoidosis, which first manifested in a tattoo in a patient with metastatic urothelial cancer on therapy with anti-CTLA-4 (ipilimumab) and anti-PD1 (nivolumab).


Subject(s)
Antibodies, Monoclonal/adverse effects , Antineoplastic Agents/adverse effects , Sarcoidosis/chemically induced , Sarcoidosis/immunology , Tattooing , Urinary Bladder Neoplasms/drug therapy , Fatal Outcome , Humans , Ipilimumab , Lymphadenopathy/diagnostic imaging , Lymphadenopathy/drug therapy , Male , Middle Aged , Nivolumab
11.
Nat Protoc ; 11(2): 214-235, 2016 Feb.
Article in English | MEDLINE | ID: mdl-26741407

ABSTRACT

Single-cell DNA sequencing methods are challenged by poor physical coverage, high technical error rates and low throughput. To address these issues, we developed a single-cell DNA sequencing protocol that combines flow-sorting of single nuclei, time-limited multiple-displacement amplification (MDA), low-input library preparation, DNA barcoding, targeted capture and next-generation sequencing (NGS). This approach represents a major improvement over our previous single nucleus sequencing (SNS) Nature Protocols paper in terms of generating higher-coverage data (>90%), thereby enabling the detection of genome-wide variants in single mammalian cells at base-pair resolution. Furthermore, by pooling 48-96 single-cell libraries together for targeted capture, this approach can be used to sequence many single-cell libraries in parallel in a single reaction. This protocol greatly reduces the cost of single-cell DNA sequencing, and it can be completed in 5-6 d by advanced users. This single-cell DNA sequencing protocol has broad applications for studying rare cells and complex populations in diverse fields of biological research and medicine.


Subject(s)
Cell Nucleus , High-Throughput Nucleotide Sequencing/methods , Sequence Analysis, DNA/methods , Single-Cell Analysis/methods , Time Factors
12.
Front Syst Neurosci ; 8: 250, 2014.
Article in English | MEDLINE | ID: mdl-25653599

ABSTRACT

The ventral prefrontal cortex is an integral part of the neural circuitry that is dysregulated in mood and anxiety disorders. However, the contribution of its distinct sub-regions to the regulation of negative emotion are poorly understood. Recently we implicated both the ventrolateral prefrontal cortex (vlPFC) and anterior orbitofrontal cortex (antOFC) in the regulation of conditioned fear and anxiety responses to a social stimulus, i.e., human intruder, in the marmoset monkey. In the present study we extend our investigations to determine the role of these two regions in regulating innate responses and coping strategies to a predator stimulus, i.e., a model snake. Both the vlPFC and antOFC lesioned groups exhibited enhanced anxiety-related responses to the snake in comparison to controls. Both groups also showed a reduction in active coping behavior. These results indicate that the vlPFC and antOFC contribute independently to the regulation of both innate fear and, as previously reported, conditioned fear, and highlight the importance of these regions in producing stimulus-appropriate coping responses. The finding that dysregulation in two distinct prefrontal regions produces the apparently similar behavioral phenotype of heightened negative emotion provides insight into the varied etiology that may underlie this symptom across a wide variety of neuropsychiatric conditions with implications for personalized treatment strategies.

13.
J Neurosci ; 33(9): 4105-9, 2013 Feb 27.
Article in English | MEDLINE | ID: mdl-23447618

ABSTRACT

The orbitofrontal cortex (OFC) and basolateral amygdala (BLA) constitute part of a neural circuit important for adaptive, goal-directed learning. One task measuring flexibility of response to changes in reward is discrimination reversal learning. Damage to OFC produces well documented impairments on various forms of reversal learning in rodents, monkeys, and humans. Recent reports show that BLA, though highly interconnected with OFC, may be differentially involved in reversal learning. In the present experiment, we compared the effects of bilateral, ibotenic acid lesions of OFC or BLA (or SHAM) on visual discrimination and reversal learning. Specifically, we used pairwise visual discrimination methods, as is commonly administered in non-human primate studies, and analyzed how animals use positive and negative trial-by-trial feedback, domains not previously explored in a rat study. As expected, OFC lesions displayed significantly slower reversal learning than SHAM and BLA rats across sessions. Rats with BLA lesions, conversely, showed facilitated reversal learning relative to SHAM and OFC groups. Furthermore, a trial-by-trial analysis of the errors committed showed the BLA group benefited more from incorrectly performed trials (or negative feedback) on future choices than either SHAM or OFC rats. This provides evidence that BLA and OFC are involved in updating responses to changes in reward contingency and that the roles are distinct. Our results are discussed in relation to a competitive framework model for OFC and BLA in reward processing.


Subject(s)
Amygdala/physiology , Choice Behavior/physiology , Conditioning, Operant/physiology , Feedback , Reward , Amygdala/injuries , Analysis of Variance , Animals , Discrimination Learning/drug effects , Discrimination Learning/physiology , Excitatory Amino Acid Agonists/toxicity , Feedback/drug effects , Food Preferences/drug effects , Food Preferences/physiology , Ibotenic Acid/toxicity , Male , Photic Stimulation , Prefrontal Cortex/injuries , Prefrontal Cortex/physiology , Rats , Rats, Long-Evans , Reversal Learning
14.
Behav Neurosci ; 125(3): 350-9, 2011 Jun.
Article in English | MEDLINE | ID: mdl-21639604

ABSTRACT

The orbitofrontal cortex (OFC) and basolateral nucleus of the amygdala (BLA) are important neural regions in responding adaptively to changes in the incentive value of reward. Recent evidence suggests these structures may be differentially engaged in effort and cue-guided choice behavior. In 2 T-maze experiments, we examined the effects of bilateral lesions of either BLA or OFC on (1) effortful choices in which rats could climb a barrier for a high reward or select a low reward with no effort and (2) effortful choices when a visual cue signaled changes in reward magnitude. In both experiments, BLA rats displayed transient work aversion, choosing the effortless low reward option. OFC rats were work averse only in the no cue conditions, displaying a pattern of attenuated recovery from the cue conditions signaling reward unavailability in the effortful arm. Control measures rule out an inability to discriminate the cue in either lesion group.


Subject(s)
Amygdala/physiology , Choice Behavior/physiology , Cues , Frontal Lobe/physiology , Physical Exertion/physiology , Reward , Amygdala/drug effects , Animals , Choice Behavior/drug effects , Discrimination Learning/drug effects , Discrimination Learning/physiology , Frontal Lobe/drug effects , Ibotenic Acid/administration & dosage , Ibotenic Acid/toxicity , Male , Maze Learning/drug effects , Maze Learning/physiology , Microinjections , Physical Exertion/drug effects , Rats , Rats, Long-Evans
SELECTION OF CITATIONS
SEARCH DETAIL
...