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1.
Curr Oncol ; 30(5): 4861-4870, 2023 05 08.
Article En | MEDLINE | ID: mdl-37232824

Background: The utilization of neoadjuvant chemotherapy (NAC) remains highly variable in clinical practice. The implementation of NAC requires coordination of handoffs between a multidisciplinary team (MDT). This study aims to assess the outcomes of an MDT in the management of early-stage breast cancer patients undergoing neoadjuvant chemotherapy at a community cancer center. Methods: We conducted a retrospective case series on patients receiving NAC for early-stage operable or locally advanced breast cancer coordinated by an MDT. Outcomes of interest included the rate of downstaging of cancer in the breast and axilla, time from biopsy to NAC, time from completion of NAC to surgery, and time from surgery to radiation therapy (RT). Results: Ninety-four patients underwent NAC; 84% were White and mean age was 56.5 yrs. Of them, 87 (92.5%) had clinical stage II or III cancer, and 43 (45.8%) had positive lymph nodes. Thirty-nine patients (42.9%) were triple negative, 28 (30.8%) were human epidermal growth factor receptor (HER-2)+, and 24 (26.2%) were estrogen receptor (ER) +HER-2-. Of 91 patients, 23 (25.3%) achieved pCR; 84 patients (91.4%) had downstaging of the breast tumor, and 30 (33%) had axillary downstaging. The median time from diagnosis to NAC was 37.5 days, the time from completion of NAC to surgery was 29 days, and the time from surgery to RT was 49.5 days. Conclusions: Our MDT provided timely, coordinated, and consistent care for patients with early-stage breast cancer undergoing NAC as evidenced by time to treatment outcomes consistent with recommended national trends.


Breast Neoplasms , Humans , Middle Aged , Female , Breast Neoplasms/pathology , Neoadjuvant Therapy , Retrospective Studies , Chemotherapy, Adjuvant , Patient Care Team
2.
Syst Biol ; 67(1): 49-60, 2018 Jan 01.
Article En | MEDLINE | ID: mdl-29253296

Scientists building the Tree of Life face an overwhelming challenge to categorize phenotypes (e.g., anatomy, physiology) from millions of living and fossil species. This biodiversity challenge far outstrips the capacities of trained scientific experts. Here we explore whether crowdsourcing can be used to collect matrix data on a large scale with the participation of nonexpert students, or "citizen scientists." Crowdsourcing, or data collection by nonexperts, frequently via the internet, has enabled scientists to tackle some large-scale data collection challenges too massive for individuals or scientific teams alone. The quality of work by nonexpert crowds is, however, often questioned and little data have been collected on how such crowds perform on complex tasks such as phylogenetic character coding. We studied a crowd of over 600 nonexperts and found that they could use images to identify anatomical similarity (hypotheses of homology) with an average accuracy of 82% compared with scores provided by experts in the field. This performance pattern held across the Tree of Life, from protists to vertebrates. We introduce a procedure that predicts the difficulty of each character and that can be used to assign harder characters to experts and easier characters to a nonexpert crowd for scoring. We test this procedure in a controlled experiment comparing crowd scores to those of experts and show that crowds can produce matrices with over 90% of cells scored correctly while reducing the number of cells to be scored by experts by 50%. Preparation time, including image collection and processing, for a crowdsourcing experiment is significant, and does not currently save time of scientific experts overall. However, if innovations in automation or robotics can reduce such effort, then large-scale implementation of our method could greatly increase the collective scientific knowledge of species phenotypes for phylogenetic tree building. For the field of crowdsourcing, we provide a rare study with ground truth, or an experimental control that many studies lack, and contribute new methods on how to coordinate the work of experts and nonexperts. We show that there are important instances in which crowd consensus is not a good proxy for correctness.


Classification/methods , Crowdsourcing/standards , Phylogeny , Animals , Phenotype , Professional Competence , Reproducibility of Results
3.
Oncology (Williston Park) ; 29(6): 446-58, 460-1, 2015 Jun.
Article En | MEDLINE | ID: mdl-26089220

Ductal carcinoma in situ (DCIS) is a breast neoplasm with potential for progression to invasive cancer. Management commonly involves excision, radiotherapy, and hormonal therapy. Surgical assessment of regional lymph nodes is rarely indicated except in cases of microinvasion or mastectomy. Radiotherapy is employed for local control in breast conservation, although it may be omitted for select low-risk situations. Several radiotherapy techniques exist beyond standard whole-breast irradiation (ie, partial-breast irradiation [PBI], hypofractionated whole-breast radiation); evidence for these is evolving. We present an update of the American College of Radiology (ACR) Appropriateness Criteria® for the management of DCIS. The ACR Appropriateness Criteria® are evidence-based guidelines for specific clinical conditions, which are reviewed every 3 years by a multidisciplinary expert panel. The guideline development and review includes an extensive analysis of current medical literature from peer-reviewed journals and the application of a well-established consensus methodology (modified Delphi technique) to rate the appropriateness of imaging and treatment procedures by the panel. In those instances where evidence is lacking or not definitive, expert opinion may be used to recommend imaging or treatment.


Breast Neoplasms/therapy , Carcinoma, Intraductal, Noninfiltrating/therapy , Antineoplastic Agents, Hormonal/therapeutic use , Breast Neoplasms/pathology , Carcinoma, Intraductal, Noninfiltrating/pathology , Carcinoma, Lobular/pathology , Carcinoma, Lobular/therapy , Female , Humans , Magnetic Resonance Imaging , Mammography , Mastectomy , Mastectomy, Segmental , Neoplasm Invasiveness , Radiotherapy Dosage , Radiotherapy, Adjuvant , Sentinel Lymph Node Biopsy , Tamoxifen/therapeutic use
4.
Evol Bioinform Online ; 11: 43-8, 2015.
Article En | MEDLINE | ID: mdl-25861210

The CIPRES Science Gateway is a community web application that provides public access to a set of parallel tree inference and multiple sequence alignment codes run on large computational resources. These resources are made available at no charge to users by the NSF Extreme Science and Engineering Discovery Environment (XSEDE) project. Here we describe the CIPRES RESTful application programmer interface (CRA), a web service that provides programmatic access to all resources and services currently offered by the CIPRES Science Gateway. Software developers can use the CRA to extend their web or desktop applications to include the ability to run MrBayes, BEAST, RAxML, MAFFT, and other computationally intensive algorithms on XSEDE. The CRA also makes it possible for individuals with modest scripting skills to access the same tools from the command line using curl, or through any scripting language. This report describes the CRA and its use in three web applications (Influenza Research Database - www.fludb.org, Virus Pathogen Resource - www.viprbrc.org, and MorphoBank - www.morphobank.org). The CRA is freely accessible to registered users at https://cipresrest.sdsc.edu/cipresrest/v1; supporting documentation and registration tools are available at https://www.phylo.org/restusers.

5.
PLoS Curr ; 52013 Jun 26.
Article En | MEDLINE | ID: mdl-23827969

The phenotype represents a critical interface between the genome and the environment in which organisms live and evolve. Phenotypic characters also are a rich source of biodiversity data for tree building, and they enable scientists to reconstruct the evolutionary history of organisms, including most fossil taxa, for which genetic data are unavailable. Therefore, phenotypic data are necessary for building a comprehensive Tree of Life. In contrast to recent advances in molecular sequencing, which has become faster and cheaper through recent technological advances, phenotypic data collection remains often prohibitively slow and expensive. The next-generation phenomics project is a collaborative, multidisciplinary effort to leverage advances in image analysis, crowdsourcing, and natural language processing to develop and implement novel approaches for discovering and scoring the phenome, the collection of phentotypic characters for a species. This research represents a new approach to data collection that has the potential to transform phylogenetics research and to enable rapid advances in constructing the Tree of Life. Our goal is to assemble large phenomic datasets built using new methods and to provide the public and scientific community with tools for phenomic data assembly that will enable rapid and automated study of phenotypes across the Tree of Life.

6.
Cladistics ; 27(5): 529-537, 2011 Oct.
Article En | MEDLINE | ID: mdl-34875801

A highly interoperable informatics infrastructure rapidly emerged to handle genomic data used for phylogenetics and was instrumental in the growth of molecular systematics. Parallel growth in software and databases to address needs peculiar to phylophenomics has been relatively slow and fragmented. Systematists currently face the challenge that Earth may hold tens of millions of species (living and fossil) to be described and classified. Grappling with research on this scale has increasingly resulted in work by teams, many constructing large phenomic supermatrices. Until now, phylogeneticists have managed data in single-user, file-based desktop software wholly unsuitable for real-time, team-based collaborative work. Furthermore, phenomic data often differ from genomic data in readily lending themselves to media representation (e.g. 2D and 3D images, video, sound). Phenomic data are a growing component of phylogenetics, and thus teams require the ability to record homology hypotheses using media and to share and archive these data. Here we describe MorphoBank, a web application and database leveraging software as a service methodology compatible with "cloud" computing technology for the construction of matrices of phenomic data. In its tenth year, and fully available to the scientific community at-large since inception, MorphoBank enables interactive collaboration not possible with desktop software, permitting self-assembling teams to develop matrices, in real time, with linked media in a secure web environment. MorphoBank also provides any user with tools to build character and media ontologies (rule sets) within matrices, and to display these as directed acyclic graphs. These rule sets record the phylogenetic interrelatedness of characters (e.g. if X is absent, Y is inapplicable, or X-Z characters share a media view). MorphoBank has enabled an order of magnitude increase in phylophenomic data collection: a recent collaboration by more than 25 researchers has produced a database of > 4500 phenomic characters supported by > 10 000 media. © The Willi Hennig Society 2011.

7.
Med Hypotheses ; 75(2): 192-5, 2010 Aug.
Article En | MEDLINE | ID: mdl-20219289

Epidemiological evidence has pointed to the benefits of physical activity in reducing breast cancer risk, which in turn has prompted the American Cancer Society (ACS) to make specific recommendations for adopting a life style of physical activity as a guideline for cancer protection. There is also evidence for benefits of physical activity during and after cancer treatments of chemotherapy and radiation therapy. The ACS recommendations for exercise as prevention and for exercise during/after cancer treatment are the same: "that adults engage in at least 30 min of moderate to vigorous physical activity, above usual activities, on 5 or more days of the week; 45-60 min of intentional physical activity are preferable." These recommendations suggest participation in aerobic types of physical activity (e.g. brisk walking, biking). Effects of resistance exercise were not addressed specifically by the ACS but have been found to increase lean body mass in patients undergoing cancer treatment. Also, many women preferred resistance exercise over aerobic exercise during breast cancer treatment. In response to strenuous resistance exercise, however, muscle satellite (progenitor) cells are activated to reenter the cell cycle and proliferate. Satellite cells can then contribute their nuclear material into the fiber to facilitate muscle repair, regeneration, and hypertrophy. Cancer therapy damages rapidly dividing cells and thus has the potential to target satellite cells that enter into the cell cycle. Although satellite cells are self-renewing, they are not completely replenished over the lifespan so losses in this progenitor population via resistance exercise and cancer therapy may impair the maintenance of muscle mass with aging. Before recommending resistance training during breast cancer treatment, we must have more information about cancer treatment effects on activated satellite cells in human studies.


Breast Neoplasms/drug therapy , Breast Neoplasms/therapy , Exercise/physiology , Adult , Body Composition , Female , Humans , Life Style , Motor Activity
8.
Int J Radiat Oncol Biol Phys ; 71(1): 107-14, 2008 May 01.
Article En | MEDLINE | ID: mdl-18037585

PURPOSE: To present a retrospective multi-institutional experience of patients treated with the MammoSite radiation therapy system (RTS). METHODS AND MATERIALS: Nine institutions participated in a pooled analysis of data evaluating the clinical experience of the MammoSite RTS for delivering accelerated partial breast irradiation. Between 2000 and 2004, 483 patients were treated with the MammoSite RTS to 34 Gy delivered in 10 fractions. Treatment parameters were analyzed to identify factors affecting outcome. RESULTS: Median follow-up was 24 months (minimum of 1 year). Overall, infection was documented in 9% of patients, but the rate was only 4.8% if the catheter was placed after lumpectomy. Six patients (1.2%) experienced an in-breast failure; four failures occurred remote from the lumpectomy site (elsewhere failure). Cosmetic results were good/excellent in 91% of patients. Treatment parameters identified as significant on univariate analysis were tested in multivariate regression analysis. The closed-cavity placement technique significantly reduced the risk of infection (p = 0.0267). A skin spacing of <6 mm increased the risk of severe acute skin reaction (p = 0.0178) and telangiectasia (p = 0.0280). The use of prophylactic antibiotics reduced the risk of severe acute skin reaction (p < 0.0001). The use of multiple dwell positions reduced the risk of severe hyperpigmentation (p = 0.0278). Infection was associated with an increased risk of fair or poor overall cosmesis (p = 0.0009). CONCLUSIONS: In this series of patients, the MammoSite RTS seems to have acceptable toxicity rates and cosmetic outcomes, comparable to those with whole-breast radiotherapy. On the basis of these data, the closed-cavity placement technique, use of prophylactic antibiotics, use of multiple dwell positions, and a minimum skin spacing of 6 mm seem to improve patient outcome.


Brachytherapy/instrumentation , Breast Neoplasms/radiotherapy , Analysis of Variance , Brachytherapy/adverse effects , Brachytherapy/methods , Breast Neoplasms/surgery , Female , Follow-Up Studies , Humans , Infections/etiology , Mastectomy, Segmental , Radiodermatitis/etiology , Retrospective Studies , Treatment Outcome
9.
Brachytherapy ; 6(4): 286-92, 2007.
Article En | MEDLINE | ID: mdl-17991625

PURPOSE: To present an updated analysis of survival, recurrence rate, and toxicity for a cohort of women with early-stage breast cancer treated with high-dose-rate interstitial brachytherapy for accelerated partial breast irradiation. METHODS AND MATERIALS: From August 1997 to July 2001, a total of 32 women with 33 breast cancers were treated with interstitial high-dose-rate brachytherapy after breast-conserving surgery as part of a Phase I/II protocol. All patients had T1-2 tumors with < or b=3 axillary nodes positive, nonlobular histology, negative surgical margins, and no evidence of extracapsular lymph node extension. Multiple brachytherapy catheters were used and radiation was delivered with a high activity (3-10Ci) (192)Ir source placed via remote after loader. Dose was prescribed to the tumor bed plus a 2 cm margin. A total of 3400 cGy was delivered in 10 fractions of 340 cGy each given twice daily over 5 days. Toxicities (skin, subcutaneous tissue, pain, fat necrosis) were evaluated by Radiation Therapy Oncology Group criteria; cosmesis was assessed using a previously published scale. Toxicity scores were separated into four followup intervals: < or =6 months, >6 months and < or =2 years, >2 and < or =5 years, and >5 years. RESULTS: The actuarial local recurrence rate was 6.1% at 5 years with the last measured event at 70.5 months. A total of three treatment failures were observed at 25.8, 39.9, and 70.5 months of followup. All three were elsewhere failures within the treated breast. One patient died after 90.0 months of followup secondary to a subsequently diagnosed small-cell lung cancer. For the purpose of analysis, toxicity scores were assigned to each of four followup intervals: < or =6 months, >6 but < or =24 months, >24 but < or =60 months, and >60 months. Fat necrosis was not seen in the first 6 months after treatment, then appeared in 27.3% of patients from 6 to 24 months, 28.1% from 24 to 60 months, and 17.9% beyond 60 months. Skin toxicity appeared to stabilize with longer followup: the percentage of patients showing any degree of skin toxicity was 69.7%, 33.3%, 40.6%, and 28.6% at each successive time interval. Subcutaneous toxicity increased beyond 60 months: moderate to severe subcutaneous toxicity was seen in 15.2%, 18.2%, 18.8%, and 35.7% of patients successively. The percentage of patients with less than excellent cosmetic outcome improved beyond 60 months (21.2%, 21.2%, 21.9%, and 11.1% successively). Only 1 patient experienced more than mild pain at any time. The percentage of patients experiencing any degree of pain improved over time (30.3%, 33.3%, 18.8%, 17.9%). CONCLUSIONS: Our series showed a local recurrence rate of 6.1% at 5 years, which is comparable to that seen in conventional whole breast series. Fat necrosis was found in more than half the cohort. Fat necrosis, pain, and cosmesis appeared to improve with longer followup, whereas subcutaneous toxicity worsened and skin toxicity stabilized.


Brachytherapy/adverse effects , Brachytherapy/methods , Breast Neoplasms/radiotherapy , Adult , Aged , Breast Neoplasms/mortality , Female , Humans , Middle Aged , Neoplasm Recurrence, Local , Survival Analysis , Time Factors
10.
Cancer Res ; 67(13): 6136-45, 2007 Jul 01.
Article En | MEDLINE | ID: mdl-17616670

Invasive breast cancer has a high risk of recurrence to incurable disease and needs improved prognostic and therapeutic tools. Our work combines clinical and molecular analyses to show that the transcriptional repressor HBP1 may be a new target for invasive breast cancer. Previous work indicated that HBP1 regulated proliferation and senescence and inhibited Wnt signaling. Two of these functions have been associated with invasive breast cancer. In 76 breast tumors, we identified 10 HBP1 mutations/variants that were associated with fully invasive breast cancer. In a separate analysis, we found that a subset of invasive breast cancer specimens also had reduced HBP1 mRNA levels. These clinical correlations suggested that mutation or reduction of HBP1 occurs in invasive breast cancer and that HBP1 might regulate the proliferation and invasiveness of this breast cancer type. Analysis of the HBP1 mutants showed they were functionally defective for suppressing Wnt signaling. To test the consequences of reduced HBP1 levels, we used RNA interference to knock down HBP1 and observed increased Wnt signaling, tumorigenic proliferation, and invasiveness in cell and animal breast cancer models. Lastly, statistical analysis of a breast cancer patient database linked reduced HBP1 expression to breast cancer recurrence. In considering two-gene criteria for relapse potential, reduced expression of HBP1 and SFRP1, which is another Wnt inhibitor that was recently linked to invasive breast cancer, strikingly correlated with recurrence. Together, these data indicate that HBP1 may be a molecularly and clinically relevant regulator of breast cancer transitions that eventually lead to poor prognosis.


Breast Neoplasms/metabolism , Gene Expression Regulation, Neoplastic , High Mobility Group Proteins/biosynthesis , High Mobility Group Proteins/genetics , Repressor Proteins/biosynthesis , Repressor Proteins/genetics , Transcription, Genetic , Animals , Female , Humans , Mice , Mice, SCID , Mutation , NIH 3T3 Cells , Neoplasm Invasiveness , Neoplasm Metastasis , Neoplasm Transplantation , Treatment Outcome
12.
Emerg Med Clin North Am ; 24(2): 339-70, vi, 2006 May.
Article En | MEDLINE | ID: mdl-16584961

Already the major cause of mortality in the United States, cardio-vascular emergencies will become increasingly prevalent in the future as the geriatric population doubles. This article discusses five cardiovascular emergencies: acute coronary syndrome, congestive heart failure, dysrythmias, aortic dissection, and ruptured abdominal aortic aneurysm. The discussion focuses on the differences in presentation, management, and outcomes that characterize each disease amongst the elderly. As a rule, the elderly have significantly worse outcomes than younger patients.


Cardiovascular Diseases/epidemiology , Emergencies/epidemiology , Aged , Cardiovascular Diseases/therapy , Health Services for the Aged , Humans , Incidence , United States/epidemiology
13.
Int J Radiat Oncol Biol Phys ; 65(2): 333-9, 2006 Jun 01.
Article En | MEDLINE | ID: mdl-16545918

PURPOSE: To investigate the incidence of, and possible factors associated with, seroma formation after intraoperative placement of the MammoSite catheter for accelerated partial breast irradiation. METHODS AND MATERIALS: This study evaluated 38 patients who had undergone intraoperative MammoSite catheter placement at lumpectomy or reexcision followed by accelerated partial breast irradiation with 34 Gy in 10 fractions. Data were collected regarding dosimetric parameters, including the volume of tissue enclosed by the 100%, 150%, and 200% isodose shells, dose homogeneity index, and maximal dose at the surface of the applicator. Clinical and treatment-related factors were analyzed, including patient age, patient weight, history of diabetes and smoking, use of reexcision, interval between surgery and radiotherapy, total duration of catheter placement, total excised specimen volume, and presence or absence of postprocedural infection. Seroma was verified by clinical examination, mammography, and/or ultrasonography. Persistent seroma was defined as seroma that was clinically detectable >6 months after radiotherapy completion. RESULTS: After a median follow-up of 17 months, the overall rate of any detectable seroma was 76.3%. Persistent seroma (>6 months) occurred in 26 (68.4%) of 38 patients, of whom 46% experienced at least modest discomfort at some point during follow-up. Of these symptomatic patients, 3 required biopsy or complete cavity excision, revealing squamous metaplasia, foreign body giant cell reaction, fibroblasts, and active collagen deposition. Of the analyzed dosimetric, clinical, and treatment-related variables, only body weight correlated positively with the risk of seroma formation (p = 0.04). Postprocedural infection correlated significantly (p = 0.05) with a reduced risk of seroma formation. Seroma was associated with a suboptimal cosmetic outcome, because excellent scores were achieved in 61.5% of women with seroma compared with 83% without seroma. CONCLUSION: Intraoperative placement of the MammoSite catheter for accelerated partial breast irradiation is associated with a high rate of clinically detectable seroma that adversely affects the cosmetic outcome. The seroma risk was positively associated with body weight and negatively associated with postprocedural infection.


Brachytherapy/adverse effects , Breast Neoplasms/radiotherapy , Carcinoma, Ductal, Breast/radiotherapy , Carcinoma, Intraductal, Noninfiltrating/radiotherapy , Seroma/etiology , Adult , Aged , Aged, 80 and over , Brachytherapy/instrumentation , Breast Neoplasms/surgery , Carcinoma, Ductal, Breast/surgery , Carcinoma, Intraductal, Noninfiltrating/surgery , Female , Humans , Intraoperative Period , Mastectomy, Segmental , Middle Aged , Radiography , Radiotherapy Dosage , Recurrence , Regression Analysis , Seroma/diagnostic imaging , Seroma/pathology , Seroma/surgery , Statistics, Nonparametric
14.
Int J Radiat Oncol Biol Phys ; 64(2): 489-95, 2006 Feb 01.
Article En | MEDLINE | ID: mdl-16246495

PURPOSE: To perform a detailed analysis of variables associated with late tissue effects of high-dose-rate (HDR) interstitial brachytherapy accelerated partial breast irradiation (APBI) in a large cohort of patients with prolonged follow-up. METHODS AND MATERIALS: Beginning in 1995, 75 women with Stage I/II breast cancer were enrolled in identical institutional trials evaluating APBI as monotherapy after lumpectomy. Patients eligible included those with T1-2, N0-1 (

Brachytherapy/adverse effects , Breast Neoplasms/radiotherapy , Adipose Tissue/drug effects , Adipose Tissue/pathology , Adipose Tissue/radiation effects , Adult , Aged , Aged, 80 and over , Antibiotics, Antineoplastic/administration & dosage , Antibiotics, Antineoplastic/adverse effects , Brachytherapy/methods , Breast Neoplasms/drug therapy , Breast Neoplasms/surgery , Carcinoma, Ductal, Breast/drug therapy , Carcinoma, Ductal, Breast/radiotherapy , Carcinoma, Ductal, Breast/surgery , Combined Modality Therapy , Doxorubicin/administration & dosage , Doxorubicin/adverse effects , Fat Necrosis/chemically induced , Fat Necrosis/etiology , Female , Follow-Up Studies , Humans , Iridium Radioisotopes/therapeutic use , Middle Aged , Radiodermatitis/pathology , Radiotherapy Dosage
15.
Cancer ; 104(5): 906-12, 2005 Sep 01.
Article En | MEDLINE | ID: mdl-16047330

BACKGROUND: The MammoSite catheter is a brachytherapy device used for accelerated partial breast irradiation. Currently, it is available as 2 spherically shaped balloons meant to fill 70-cc and 120-cc cavity volumes. This study was designed to define the relation of these excision volumes to the likelihood of microscopically detectable, residual disease based on tumor size, margin status, patient age, and histology. METHODS: The study data base was comprised of 531 patients with Stage 0, I, and II breast carcinoma (using American Joint Committee on Cancer staging criteria) who received breast-conserving therapy and underwent surgical reexcision. Patients in the data base were stratified based on the volume of their initial excision: < or = 70 cc versus > 70 cc and < or = 120 cc versus > 120 cc. RESULTS: Surgical margin size was found to be a strong predictor of residual disease both for patients with smaller excision volumes (P = 0.0014) and patients with larger excision volumes (P = 0.0003); histology (extensive intraductal component [EIC] or pure ductal carcinoma in situ [DCIS]) also was a strong predictor. Tumor size was significant only for the larger volume group (P = 0.029). On multivariate analysis, only histology and initial margin status were significant correlates with residual disease. The adjusted odds ratio for residual disease with pure DCIS was 0.79, and the adjusted odds ratio for invasive ductal or lobular carcinoma (IDC/ILC) without EIC was 0.44 relative to IDC/ILC with EIC (P = 0.008). The adjusted odds ratio for residual disease with a positive initial margin versus a negative initial margin was 2.65 (P < or = 0.0001). CONCLUSIONS: For excisions amenable to use of the MammoSite catheter, a margin > or = 1.0 mm appeared to afford at most a 35% risk of microscopically detectable residual tumor. Evidence of EIC on excision of IDC/ILC connoted a significantly higher risk. Age did not appear to be predictive for residual disease.


Brachytherapy/instrumentation , Breast Neoplasms/radiotherapy , Adult , Aged , Aged, 80 and over , Breast Neoplasms/pathology , Female , Humans , Middle Aged , Multivariate Analysis , Neoplasm Staging
16.
Cancer ; 101(4): 727-34, 2004 Aug 15.
Article En | MEDLINE | ID: mdl-15305402

BACKGROUND: In interstitial brachytherapy (IB), cosmesis and toxicity correlate with volume of tissue irradiated, dose homogeneity index (DHI), and adjuvant doxorubicin/cyclophosphamide based chemotherapy (ACCT). MammoSite brachytherapy (MSB) irradiates smaller volumes than IB, and lower dose homogeneity does not appear to affect toxicity. However, clinical experience suggests that other factors may also play an important role in cosmesis and toxicity with MSB. We reviewed our prospectively maintained data base of women who underwent accelerated partial breast irradiation (APBI) to assess this issue. METHODS: Beginning in September 1995, 115 women were enrolled in a trial evaluating APBI as monotherapy after lumpectomy. The first 75 eligible patients received IB, and the most recent 28 eligible patients received MSB. All patients received 34 gray (Gy) in 10 twice-daily fractions through high-dose rate iridium-192 brachytherapy; 19% of patients in the IB group and 0% of patients in the MSB group received ACCT. RESULTS: At 1 year after treatment, MSB caused significantly less Grade 2-4 subcutaneous fibrosis (as graded by a radiation oncologist according to the Radiation Therapy Oncology Group/Eastern Cooperative Oncology Group system) compared with IB (10.7% vs. 32%; P = 0.04). However, when only ACCT-naïve patients in the IB group were compared with patients in the MSB group, this finding became nonsignificant. Among the patients who received MSB, significantly smaller volumes were irradiated, and the DHI was lower. CONCLUSIONS: Current studies suggest an improved toxicity profile with MSB compared with IB that is attributed to lower irradiated volumes with MSB. When only chemotherapy-naïve patients were compared, however, toxicity and cosmesis were found to be similar between MSB and IB, suggesting a more complex interplay between irradiated volumes, DHI, and chemotherapy. The relation of ACCT to toxicity in this scenario is intriguing and warrants further investigation.


Brachytherapy/adverse effects , Brachytherapy/methods , Breast Neoplasms/radiotherapy , Radiation Injuries/prevention & control , Aged , Breast Neoplasms/surgery , Databases, Factual , Dose Fractionation, Radiation , Female , Fibrosis/etiology , Humans , Mastectomy, Segmental , Middle Aged , Retrospective Studies , Skin/pathology
17.
Pediatr Neurol ; 28(5): 342-6, 2003 May.
Article En | MEDLINE | ID: mdl-12878294

Basal ganglia abnormalities on magnetic resonance imaging predict neurodevelopmental impairment in newborns with perinatal depression. We determined the value of a clinical encephalopathy score as a predictor of abnormal magnetic resonance imaging results in newborns with perinatal depression. We assigned a neonatal encephalopathy score to 101 newborns. The encephalopathy score, based on alertness, feeding, tone, respiratory status, reflexes, and seizure activity, was assigned once daily. The maximum score from the first 3 days of life was compared with abnormal magnetic resonance imaging results present globally or solely in the basal ganglia.Eighty-one percent of patients manifested abnormalities on any magnetic resonance imaging sequence, and 37% manifested abnormalities in the basal ganglia alone. The encephalopathy score correlated well with magnetic resonance imaging abnormalities in the basal ganglia (Spearman Rho = 0.335, P < 0.0001). Newborns with mild and severe encephalopathy had likelihood ratios of 0.41 and 7.4, respectively, for abnormal basal ganglia magnetic resonance imaging results. Newborns with moderate encephalopathy (composing 47% of the cohort) manifested basal ganglia abnormalities with a likelihood ratio of 0.785. Severe clinical encephalopathy correlates with abnormal basal ganglia magnetic resonance imaging results, and mild encephalopathy correlates with a normal magnetic resonance imaging result. However, standard clinical criteria do not alter the prior risk of abnormal basal ganglia magnetic resonance imaging results for newborns with moderate encephalopathy.


Asphyxia Neonatorum/diagnosis , Hypoxia, Brain/diagnosis , Magnetic Resonance Imaging/methods , Asphyxia Neonatorum/complications , Basal Ganglia/pathology , Female , Humans , Hypoxia, Brain/complications , Infant, Newborn , Male , Predictive Value of Tests , Prospective Studies , Statistics, Nonparametric
18.
Am J Clin Oncol ; 25(6): 606-11, 2002 Dec.
Article En | MEDLINE | ID: mdl-12478010

Malignant gliomas are usually refractory to aggressive combined-modality therapy, and the incidence of recurrence and death after treatment is very high. State-of-the-art techniques such as stereotactic intensity-modulated radiation therapy (IMRT) are now available to deliver a high dose of radiation to the tumor with relative preservation of surrounding tissues to achieve optimal tumor coverage with minimal toxicity. We report 10 patients (median age 48 years) with recurrent malignant gliomas that were treated with stereotactic directed IMRT. Initial tumor histologies included one low grade glioma (upgraded to anaplastic astrocytoma at recurrence), four anaplastic astrocytomas, and four glioblastomas multiforme. One patient was originally presumed to have a brain metastasis secondary to renal cell carcinoma but was pathologically confirmed as having glioblastoma multiforme at the time of recurrence. Before recurrence, all patients had been treated with external beam radiation therapy (median 59.7 Gy). All recurrences were confirmed by a subtotal resection (5/10) or by imaging (5/10). The median Karnofsky performance score at the time of IMRT was 80. The median tumor volume was 34.69 cm. Treatment was delivered on a 10-MV linear accelerator with a mini-multileaf collimator, MIMiC, and planned with Peacock/Corvus software. Radiation was delivered in daily fractions of 5 Gy, to a total median dose of 30 Gy at the 71% to 93% median isodose line. Median overall survival time was 10.1 months from the date of stereotactic treatment, with 1- and 2-year survival rates of 50% and 33.3%, respectively. Fractionated stereotactic intensity modulated radiation therapy is a novel technique used in the treatment of recurrent malignant gliomas, which produces results comparable to other currently used stereotactic techniques.


Central Nervous System Neoplasms/radiotherapy , Cranial Irradiation/methods , Glioma/radiotherapy , Neoplasm Recurrence, Local/radiotherapy , Stereotaxic Techniques , Adult , Aged , Aged, 80 and over , Dexamethasone/therapeutic use , Female , Glucocorticoids/therapeutic use , Humans , Male , Middle Aged , Radiotherapy Dosage , Retrospective Studies , Salvage Therapy , Survival Analysis
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