Harthun N.L.,Johns Hopkins Medical Institutes |
Lau C.L.,University of Virginia
Journal of Vascular Surgery | Year: 2011
Objectives: Serial computed tomography (CT) scanning is routinely used to follow up endovascular exclusion of abdominal aortic aneurysms (AAAs). Nonvascular diseases can be identified, and these exams include images of the lung bases, which can provide information that leads to the diagnosis of pulmonary neoplasms. This study was conducted to determine the rate and type of pulmonary-based oncologic diseases identified by serial CT scanning of patients with endovascular repair of AAAs. Methods: A retrospective review of 138 consecutive patients receiving endovascular AAA exclusion during an 8-year period was performed. Length of follow-up and number of CT scans performed was recorded. CT characteristics of the lesion (size, character, and suspicion of malignancy), type of biopsy procedure performed, and final pathologic diagnosis were collected. Oncologic treatments and survival length were also evaluated. Results: Pulmonary lesions were found in 25 patients (18%), of whom 5 (4%) died during follow-up, and 13 (9%) had stable, subcentimeter lesions and continue to have surveillance from vascular specialists only. Seven patients (5%) with pulmonary lesions were referred for evaluation by thoracic surgeons. Six patients (4%) underwent biopsy of the lesion and were diagnosed with cancer. One patient refused a biopsy and is being monitored with serial CT scans. Four lung cancers (1 small cell and 3 non-small cell), one primary pulmonary carcinoid tumor, and one B-cell lymphoma were discovered. No changes were noted in the lesions in the patient receiving CT surveillance. More than half of the cancers were diagnosed in stage I, with a mean lesion diameter of 11 mm at biopsy. Of 25 patients with pulmonary nodules, 24 were men. The patients diagnosed with cancer are all still alive, with a mean survival length of 2.5 years (range, 0.5-6 years) after oncologic treatment. Conclusions: Serial CT scans may reveal a high rate of pulmonary malignancies in a population with AAAs. Attention to the incidental finding of pulmonary nodules on CT scans and arrangement of appropriate follow-up by the vascular surgeon is important for patients undergoing surveillance after endovascular AAA repair. These results indicate that aggressive management of these lesions (early thoracic surgery consultation and biopsy) is appropriate in this high-risk population and may offer early diagnosis and improved long-term survival. © 2011 Society for Vascular Surgery.
Harthun N.L.,Johns Hopkins Medical Institutes |
Gahtan V.,Syracuse University
American Journal of Surgery | Year: 2011
Vascular surgery has undergone a minimally invasive revolution in the past 15 years. The subspecialty emerged with many changes to its training paradigms that have made this field more attractive to both medical student and general surgery resident candidates. Commitment to diagnosis and treatment of arterial, venous, and lymphatic systems disorders remains the cornerstone of this profession, but an entirely new generation of endovascular treatments has been added to the staple of open surgical procedures used to treat these diseases. A wide variety of practice options are available, ranging from high-stress, technologically demanding complex arterial repairs to low-risk, outpatient, venous insufficiency treatment and all combinations in-between. Many online resources are available to allow an interested candidate to stay current with all the exciting changes in the field. This information is maintained by strong national organizations of vascular surgeons. Copyright © 2011 Published by Elsevier Inc.
Kadin M.E.,Boston University |
Pavlov I.Y.,University of Utah |
Delgado J.C.,University of Utah |
Vonderheid E.C.,Johns Hopkins Medical Institutes
Journal of Investigative Dermatology | Year: 2012
Histopathology alone cannot predict the outcome of patients with CD30+ primary cutaneous lymphoproliferative disorders (CD30CLPD) and early mycosis fungoides (MF). To test the hypothesis that serum cytokines/cytokine receptors provide prognostic information in these disorders, we measured soluble CD30 (sCD30), sCD25, and selected cytokines in cell cultures and sera of 116 patients with CD30CLPD and 96 patients with early MF followed up to 20 years. Significant positive correlation was found between sCD30 levels and sCD25, CD40L, IL-6, and IL-8, suggesting that CD30+ neoplastic cells secrete these cytokines, but not Th2 cytokines. In vitro studies confirmed that sCD30, sCD25, IL-6, and IL-8 are secreted by CD30CLPD-derived cell lines. CD30CLPD patients with above normal sCD30 and sCD25 levels had worse overall and disease-related survivals, but only sCD30 retained significance in Cox models that included advanced age. High sCD30 also identified patients with worse survival in early MF. Increased IL-6 and IL-8 levels correlated with poor disease-related survival in CD30CLPD patients. We conclude that (1) neoplastic cells of some CD30CLPD patients do not resemble Th2 cells, and that (2) high serum sCD30, sCD25, IL-6, and perhaps IL-8 levels may provide prognostic information useful for patient management. © 2012 The Society for Investigative Dermatology.
Beaulieu R.J.,Johns Hopkins Medical Institutes |
Arnaoutakis K.D.,Johns Hopkins Medical Institutes |
Abularrage C.J.,Johns Hopkins Hospital |
Efron D.T.,Johns Hopkins Hospital |
And 2 more authors.
Journal of Vascular Surgery | Year: 2014
Introduction Acute mesenteric ischemia (AMI) is a commonly fatal result of inadequate bowel perfusion that requires immediate evaluation by both vascular and general surgeons. Treatment often involves vascular repair as well as bowel resection and the possible need for parenteral nutrition. Little data exist regarding the rates of bowel resection following endovascular vs open repair of AMI. Methods Using the National Inpatient Sample database, admissions from 2005 through 2009 were identified according to International Classification of Diseases, Ninth Revision codes correlating to both AMI (557.0) and subsequent vascular intervention (39.26, 38.16, 38.06, 39.9, 99.10). Patients with a diagnosis of AMI but no intervention or nonemergent admission status were excluded. Patient level data regarding age, gender, and comorbidities were also examined. Outcome measures included mortality, length of stay, the need for bowel resection (45.6, 45.71-9, 45.8), or infusion of total parenteral nutrition (TPN; 99.10) during the same hospitalization. Statistical analysis was conducted by χ2 tests and Wilcoxon rank-sum comparisons. Results Of 23,744 patients presenting with AMI, 4665 underwent interventional treatment from 2005 through 2009. Of these patients, 57.1% were female, and the mean age was 70.5 years. A total of 679 patients underwent vascular intervention; 514 (75.7%) underwent open surgery and 165 (24.3%) underwent endovascular treatment overall during the study period. The proportion of patients undergoing endovascular repair increased from 11.9% of patients in 2005 to 30.0% in 2009. Severity of comorbidities, as measured by the Charlson index, did not differ significantly between the treatment groups. Mortality was significantly more commonly associated with open revascularization compared with endovascular intervention (39.3% vs 24.9%; P =.01). Length of stay was also significantly longer in the patient group undergoing open revascularization (12.9 vs 17.1 days; P =.006). During the study time period, 14.4% of patients undergoing endovascular procedures required bowel resection compared with 33.4% for open revascularization (P <.001). Endovascular repair was also less commonly associated with requirement for TPN support (13.7% vs 24.4%; P =.025). Conclusions Endovascular intervention for AMI had increased significantly in the modern era. Among AMI patients undergoing revascularization, endovascular treatment was associated with decreased mortality and shorter length of stay. Furthermore, endovascular intervention was associated with lower rates of bowel resection and need for TPN. Further research is warranted to determine if increased use of endovascular repair could improve overall and gastrointestinal outcomes among patients requiring vascular repair for AMI. Copyright © 2014 by the Society for Vascular Surgery.
Marvel C.L.,Johns Hopkins Medical Institutes |
Desmond J.E.,Johns Hopkins Medical Institutes
Cortex | Year: 2010
Contributions of cerebro-cerebellar function to executive verbal working memory were examined using event-related functional magnetic resonance imaging (fMRI) while 16 subjects completed two versions of the Sternberg task. In both versions subjects were presented with two or six target letters during the encoding phase, which were held in memory during the maintenance phase. A single probe letter was presented during the retrieval phase. In the " match condition" , subjects decided whether the probe matched the target letters. In the " executive condition" , subjects created a new probe by counting two alphabetical letters forward (e.g., f → h) and decided whether the new probe matched the target letters. Neural activity during the match and executive conditions was compared during each phase of the task. There were four main findings. First, cerebro-cerebellar activity increased as a function of executive load. Second, the dorsal cerebellar dentate co-activated with the supplementary motor area (SMA) during encoding. This likely represented the formation of an articulatory (motor) trajectory. Third, the ventral cerebellar dentate co-activated with anterior prefrontal regions Brodmann Area (BA) 9/46 and the pre-SMA during retrieval. This likely represented the manipulation of information and formation of a response. A functional dissociation between the dorsal " motor" dentate and " cognitive" ventral dentate agrees with neuroanatomical tract tracing studies that have demonstrated separate neural pathways involving each region of the dentate: the dorsal dentate projects to frontal motor areas (including the SMA), and the ventral dentate projects to frontal cognitive areas (including BA 9/46 and the pre-SMA). Finally, activity during the maintenance phase in BA 9, anterior insula, pre-SMA and ventral dentate predicted subsequent accuracy of response to the probe during the retrieval phase. This finding underscored the significant contribution of the pre-SMA/ventral dentate pathway - observed several seconds prior to any motor response to the probe - to executive verbal working memory. © 2009 Elsevier Srl.