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Dive into the research topics where Allan Pickens is active.

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Featured researches published by Allan Pickens.


The Annals of Thoracic Surgery | 2009

Analysis of Cervical Esophagogastric Anastomotic Leaks After Transhiatal Esophagectomy: Risk Factors, Presentation, and Detection

David T. Cooke; Giant C. Lin; Christine L. Lau; Linda Zhang; Ming Sing Si; Julia Lee; Andrew C. Chang; Allan Pickens; Mark B. Orringer

BACKGROUNDnTranshiatal esophagectomy with cervical esophagogastric anastomosis is a common approach in patients requiring esophagectomy. Factors for developing cervical esophagogastric anastomosis leaks (CEGAL), their presentation, and the value of a routine postoperative screening barium swallow in detecting CEGALs and other complications were analyzed.nnnMETHODSnThis single-institution retrospective study used medical records and an esophagectomy database to assess results in 1,133 patients who underwent transhiatal esophagectomy and a cervical esophagogastric anastomosis, 241 for benign disease and 892 for cancer, between January 1996 and December 2006.nnnRESULTSnEsophagectomy patients who experienced CEGALs included 127 (14.2%) with cancer and 23 (9.5%) with benign disease. Logistic regression analysis identified increasing number of preoperative comorbidities (p < 0.001), active smoking history (p = 0.044), and postoperative arrhythmia (p = 0.002) as risk factors for CEGALs, and a side-to-side stapled cervical esophagogastric anastomosis compared with a manually sewn one as protective (p < 0.001). For cancer patients, higher pathologic stage disease (p = 0.050) was a risk factor for CEGALs. For patients with benign disease, a higher number of prior esophagogastric operations (p = 0.007) is a risk factor for CEGALs. Of the 90.7% of CEGALs that occurred on or before postoperative day 10, cervical wound drainage (63.3%) was the most common presenting symptom. Screening barium swallow identified postoperative complications and influenced outcome in 39 patients (3.8%).nnnCONCLUSIONSnHigher number of preoperative comorbidities, advanced pathologic stage, postoperative arrhythmia, an increased number of prior esophagogastric surgeries, and active smoking history are risk factors for developing CEGAL, and a side-to-side stapled cervical esophagogastric anastomosis is protective. Screening barium swallow identifies few postoperative complications, but provides quality control.


International Journal of Radiation Oncology Biology Physics | 2010

Comparative survival in patients with postresection recurrent versus newly diagnosed non-small-cell lung cancer treated with radiotherapy.

Xu Wei Cai; L. Xu; Li Wang; James A. Hayman; Andrew C. Chang; Allan Pickens; Kemp B. Cease; Mark B. Orringer; Feng Ming Kong

PURPOSEnTo compare the survival of postresection recurrent vs. newly diagnosed non-small-cell lung cancer (NSCLC) patients treated with radiotherapy or chemoradiotherapy.nnnMETHODS AND MATERIALSnThe study population consisted of 661 consecutive patients with NSCLC registered in the radiation oncology databases at two medical centers in the United States between 1992 and 2004. Of the 661 patients, 54 had postresection recurrent NSCLC and 607 had newly diagnosed NSCLC. Kaplan-Meier and Cox regression models were used for the survival analyses.nnnRESULTSnThe distribution of relevant clinical factors between these two groups was similar. The median survival time and 5-year overall survival rates were 19.8 months (95% confidence interval [CI], 13.9-25.7) and 14.8% (95% confidence interval, 5.4-24.2%) vs. 12.2 months (95% CI, 10.8-13.6) and 11.0% (95% CI, 8.5-13.5%) for recurrent vs. newly diagnosed patients, respectively (p = .037). For Stage I-III patients, no significant difference was observed in the 5-year overall survival (p = .297) or progression-free survival (p = .935) between recurrent and newly diagnosed patients. For the 46 patients with Stage I-III recurrent disease, multivariate analysis showed that chemotherapy was a significant prognostic factor for 5-year progression-free survival (hazard ratio, 0.45; 95% CI, 0.224-0.914; p = .027).nnnCONCLUSIONnOur institutional data have shown that patients with postresection recurrent NSCLC achieved survival comparable to that of newly diagnosed NSCLC patients when they were both treated with radiotherapy or chemoradiotherapy. These findings suggest that patients with postresection recurrent NSCLC should be treated as aggressively as those with newly diagnosed disease.


The Annals of Thoracic Surgery | 2010

Outcomes After Esophagectomy in Patients With Prior Antireflux or Hiatal Hernia Surgery

Andrew C. Chang; Julia S. Lee; Konrad T. Sawicki; Allan Pickens; Mark B. Orringer

BACKGROUNDnEsophagectomy is indicated occasionally for the treatment of patients with refractory gastroesophageal reflux disease (GERD) or recurrent hiatus hernia. The purpose of this study was to evaluate the impact of previous gastroesophageal operations on outcomes after esophagectomy for recurrent GERD or hiatus hernia.nnnMETHODSnUsing a prospectively accumulated database, a retrospective review was performed to identify patients undergoing esophagectomy for complicated GERD or hiatus hernia. Mortality, perioperative and functional outcomes, and need for reoperation were evaluated, assessing esophagectomy patients who had undergone prior operations for GERD or hiatus hernia.nnnRESULTSnOf 258 patients with GERD or hiatus hernia undergoing esophagectomy, 104 had undergone a previous operation, with a median interval to esophagectomy of 28 months. Transhiatal resection was accomplished in fewer patients undergoing reoperation (87 of 104 versus 151 of 154; p<0.005). A gastric conduit was used as an esophageal replacement in fewer patients with previous operation(s) (89 of 104 versus 150 of 154; p<0.005). Esophagectomy patients with a history of prior gastroesophageal surgery, as compared with those without, sustained more blood loss and were more likely to require reoperation, and fewer reported good to excellent swallowing function (p<0.05). There was no difference in the occurrence of anastomotic leak.nnnCONCLUSIONSnEsophagectomy in patients who have undergone prior operations for either GERD or hiatus hernia can be accomplished without thoracotomy and with satisfactory intermediate-term quality of life. Such patients should be evaluated and prepared for the use of alternative conduits should the remobilized stomach prove to be an unsatisfactory esophageal substitute at the time of esophagectomy.


Archive | 2009

Site-directed therapy for lung cancer metastases

Kevin S. Oh; Baskaran Sundaram; Venkataramu N. Krishnamurthy; Allan Pickens; Malini Venkatram; Ella A. Kazerooni; Charlie Pan; James A. Hayman

At the time of diagnosis, 40% of patients with non-small cell lung cancer (NSCLC) and nearly 70% of patients with small cell lung cancer (SCLC) have advanced metastatic disease. The prognosis of patients with advanced lung cancer is dismal, with a 5-year overall survival rate of 1–2%. The primary treatment of advanced disease is supportive care and palliative chemotherapy. However, there is a growing body of evidence suggesting that highly selected patients with oligometastatic disease can achieve long-term survival with ablative forms of site-directed therapy, including surgical resection, external beam radiation therapy (EBRT), stereotactic radiosurgery (SRS), stereotactic body radiation therapy (SBRT), and radiofrequency ablation (RFA). This chapter summarizes the experience with site-directed therapy in the management of metastatic lung cancer in the most commonly involved sites: brain, adrenal gland, liver, lung, and bone.


The Annals of Thoracic Surgery | 2003

Geographical distribution and racial disparity in esophageal cancer

Allan Pickens; Mark B. Orringer


The Annals of Thoracic Surgery | 2007

Fast-Tracking After Video-Assisted Thoracoscopic Surgery Lobectomy, Segmentectomy, and Pneumonectomy

Robert J. McKenna; Ali Mahtabifard; Allan Pickens; Donato A. Kusuanco; Clark Fuller


The Annals of Thoracic Surgery | 2007

Surgical treatment of epiphrenic diverticula: a 30-year experience.

Thomas K. Varghese; Becky Marshall; Andrew C. Chang; Allan Pickens; Christine L. Lau; Mark B. Orringer


American Surgeon | 2005

VATS anatomic pulmonary resection in octogenarians.

Carie Mcvay; Allan Pickens; Clark Fuller; Ward V. Houck; Robert J. McKenna


The Annals of Thoracic Surgery | 2007

Transhiatal Esophagectomy in the Profoundly Obese: Implications and Experience

Christopher N. Scipione; Andrew C. Chang; Allan Pickens; Christine L. Lau; Mark B. Orringer


American Journal of Respiratory Cell and Molecular Biology | 2007

Diversity of the angiogenic phenotype in non-small cell lung cancer.

Marc R. McClelland; Shannon Carskadon; Liujian Zhao; Eric S. White; David G. Beer; Mark B. Orringer; Allan Pickens; Andrew C. Chang; Douglas A. Arenberg

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Clark Fuller

Cedars-Sinai Medical Center

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