Nazih Zuhdi Transplant Institute

Oklahoma City, OK, United States

Nazih Zuhdi Transplant Institute

Oklahoma City, OK, United States
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Guiteau J.J.,Baylor College of Medicine | Cotton R.T.,Baylor College of Medicine | Washburn W.K.,University of Texas Health Science Center at San Antonio | Harper A.,United Network for Organ Sharing UNOS | And 8 more authors.
American Journal of Transplantation | Year: 2010

The Milan Criteria (MC) showed that orthotopic liver transplantation (OLT) was an effective treatment for patients with nonresectable, nonmetastatic HCC. There is growing evidence that expanding the MC does not adversely affect patient or allograft survival following OLT. The adult OLT programs in UNOS Region 4 reached an agreement allowing lesions outside MC (one lesion <6 cm, ≤3 lesions, none >5 cm and total diameter <9 cm-[R4 T3]) to receive the same exception points as MC lesions. Kaplan-Meier curves and log-rank tests were used to compare survival data. Chi-squared and Mann-Whitney U tests were used to compare patient data. A p-value of <0.05 was considered significant. All statistical analyses were performed on SPSS 15 (SPSS, Chicago, IL). Four hundred and forty-five patients were transplanted for HCC (363-MC and 82-R4 T3). Patient demographics were found to be similar between the two groups. Three year patient, allograft and recurrence free survival between MC and R4 T3 were found to be 72.9% and 77.1%, 71% and 70.2% and 90.5% and 86.9%, respectively (all p > 0.05). We report the first regionalized multicenter, prospective study showing benefit of OLT in patients exceeding MC based on preoperative imaging. © 2010 The American Society of Transplantation and the American Society of Transplant Surgeons.


Singhal A.,Nazih Zuhdi Transplant Institute | Sezginsoy B.,The University of Oklahoma Health Sciences Center | Ghuloom A.E.,Nazih Zuhdi Transplant Institute | Hutchinson I.V.,University of Southern California | And 2 more authors.
Experimental and Clinical Transplantation | Year: 2010

Objectives: Observations of minimal pathophysiological changes in the liver with healthy aging represent the rationale for expanding the donor pool with older donors. However, a debate exists for their upper age limit. The aim of this study is to examine the outcomes of orthotopic liver transplants from older patients (≥ 60 years). Materials and Methods: Using the Organ Procurement and Transplant Network/United Network for Organ Sharing (OPTN/UNOS) data, we retrospectively analyzed graft and patient survivals of orthotopic liver transplants done with octogenarian grafts (n=197) and compared them with orthotopic liver transplants done with donors aged between 60 and 79 years (n=4003) and < 60 years (n=21 290) during 2003 to 2007. Results: One- and 3-year graft and patient survival rates among recipients of hepatic allografts from donors < 60 years of age were significantly superior to recipients of octogenarian grafts (graft: 84% vs 75.5% at 1 year; 74.2% vs 61.2% at 3 years;P< .001; patient: 87.8% vs 81.0% at 1-year; 79.3% vs 69.1% at 3 years;P<.001). However, there was no survival difference between recipients of allografts from donors aged > 80 years and 60-79 years (graft: 75.5% vs 77.4% at 1 year; 61.2% vs 64.2% at 3 years;P = .564; patient: 81.0% vs 83.8% at 1 year; 69.1% vs 71.8% at 3 years;P = .494). It correlates well with hepatitis C virus-seronegativity and relatively lower model for end-stage liver disease score among recipients of octogenarian grafts (P < .001). Conclusions: Careful donor evaluation, avoidance of additional donor risk factors, and their pairing with appropriate recipients offer acceptable functional recovery, even with donors > 80 years. © Başkent University 2010.


Singhal A.,Nazih Zuhdi Transplant Institute | Jayaraman M.,University of Oklahoma | Dhanasekaran D.N.,University of Oklahoma | Kohli V.,Nazih Zuhdi Transplant Institute
Critical Reviews in Oncology/Hematology | Year: 2012

With increased understanding of cancer biology, a multitude of pathological, genetic, and molecular events that drive hepatocarcinogenesis, including angiogenesis, invasion, and metastasis, has been identified. Lately, they are being aggressively evaluated due to challenges involved in establishing early diagnosis, optimizing therapy for cancer inducing hepatotrophic viruses, minimizing the emergence of new tumors, and preventing recurrence after surgical resection or liver transplantation. This comprehensive review examines and critiques the evidence from published manuscripts reporting various tissue and serum biomarkers involved in hepatocellular carcinoma. These markers not only help in prediction of prognosis or recurrence, but may also assist in deciding appropriate modality of therapy and represent novel targets for potential therapeutic agents. © 2011.


Singhal A.,Nazih Zuhdi Transplant Institute | Kanagala R.,Nazih Zuhdi Transplant Institute | Wright H.I.,Nazih Zuhdi Transplant Institute | Kohli V.,Nazih Zuhdi Transplant Institute
Journal of Gastrointestinal Surgery | Year: 2010

Bile duct hamartomas (von Meyenburg complex) are the rare benign neoplasm of the liver due to dysembryogenesis; constituted historically, cystic dilatations of the bile duct encompassed by fibrous stroma. Usually, they are asymptomatic and are not detected on routine radiological examinations including ultrasound or CT scan. Magnetic resonance cholangiography has been suggested as the best investigation for their imaging diagnosis. Their presence can cause diagnostics confusion and complicate the patient's management. We report a 45-year-old female with symptomatic cholelithiasis, whose liver on laparoscopy mimicked multiple hepatic metastases. © 2010 The Society for Surgery of the Alimentary Tract.


Gurakar A.,Nazih Zuhdi Transplant Institute | Wright H.,Nazih Zuhdi Transplant Institute | Camci C.,Nazih Zuhdi Transplant Institute | Jaboour N.,Nazih Zuhdi Transplant Institute
Turkish Journal of Gastroenterology | Year: 2010

Background/aims: Peroral cholangioscopy with its limitations led to further research regarding development of SpyScope® technology. The aim of this retrospective study was to investigate the efficacy of a new device and the application of this device in our Liver Transplant Center. Methods: Charts of patients who had undergone evaluation with SpyScope® were retrospectively reviewed. Indications included pre-transplant as well as post-transplant evaluation of biliary strictures. If strictures or filling defects were noted by cholangiogram, SpyScope® was performed. Biopsy was obtained under direct visualization if necessary with SpyBite® biopsy forceps. Demographic features, indications for SpyScope® evaluation, results, and histopathological diagnoses were recorded. Results: Ten patients (6 male, 4 female; median age: 55) had undergone SpyScope® procedure between August 2007 and January 2008. Six out of 10 cases were in the pre-transplant work-up period, referred to as Group I, while the remaining four were post-transplant patients, referred to as Group II. In Group I, 4 of 6 cases had undergone the procedure for work-up of primary sclerosing cholangitis prior to orthotopic liver transplantation. In Group II, indications were either strictures noted during the previous endoscopic retrograde cholangiopancreatography (n=2) or common bile duct stones with elevated total bilirubin levels and stones with long segment biliary stricture (n=2). In the patient with anastomotic stricture, the biliary lithiasis was eventually exposed just above the anastomotic stricture, after abundant lavage was applied at that level. All SpyBite® biopsy specimens were reported to be adequate samples for histopathological examination. No malignancy was detected among 4 patients with primary sclerosing cholangitis and patients with elevated CA 19-9. Conclusions: SpyScope® allows direct visualization of biliary strictures and SpyScope®/SpyBite® were found to be technically superior to conventional cholangiogram with better sampling than brushing obtained by endoscopic retrograde cholangiopancreatography. Prospective, multicenter, large volume studies are warranted to identify its sensitivity and specificity.


Singhal A.,Nazih Zuhdi Transplant Institute | Stokes K.,Baptist Medical Center | Sebastian A.,Nazih Zuhdi Transplant Institute | Wright H.I.,Nazih Zuhdi Transplant Institute | Kohli V.,Nazih Zuhdi Transplant Institute
Transplant International | Year: 2010

Hepatic artery thrombosis (HAT) is the most frequent vascular complication following orthotopic liver transplantation. Urgent retransplantation has been considered as the mainstay therapy. Surgical revascularization is an effective alternative in asymptomatic patients. Endovascular therapies including intra-arterial thrombolysis, percutaneous transluminal angioplasty (PTA), and stent placement have shown encouraging results in recent years; however, their use remains controversial because of potential risk of hemorrhage. Until June 2009, 69 cases were published in 16 reports describing therapeutic potential of endovascular modalities. Interventions were performed as early as within 4 h to as late as 120 days in patients ranging from 4 months to 64 years of age. Majority of published reports suggested the use of urokinase. Thrombolysis was successful in 47 out of 69 (68%) patients. Bleeding was the most common complication including fatal intra-abdominal hemorrhage in three patients. Twenty-nine out of 47 (62%) patients underwent further intervention in the form of PTA, stenting, or both. The follow-up patency ranged from 1 month to 26 months. In conclusion, whenever possible, efforts should be made to rescue the liver grafts through urgent revascularization (surgical and/or endovascular) depending on patient's condition and interventional expertise at the transplant center; reserving the option of retransplantation for failure, complications, and cases with severe clinical symptoms or allograft dysfunction. © 2009 European Society for Organ Transplantation.


Kohli V.,Nazih Zuhdi Transplant Institute | Singhal A.,Temple University | Elliott L.,Nazih Zuhdi Transplant Institute | Jalil S.,Nazih Zuhdi Transplant Institute
Transplant International | Year: 2012

Summary Recurrence of hepatocellular carcinoma (HCC) is one of the major concerns following liver transplantation (LT). With the potential antitumor properties of interferon (IFN), their role in prevention of HCC recurrence is to be defined. We retrospectively reviewed 46 patients who underwent LT for hepatitis C virus (HCV)-related HCC between January 2004 and December 2008. Twenty-four (52.2%) patients with biopsy-proven HCV recurrence received antiviral therapy (IFN group); their outcomes were compared with 22 patients (control group). There was no significant difference for tumor size, number, and type of neo-adjuvant therapy between the two groups. The 1- and 3-year overall patient survival (100% vs. 90.9% and 87.3% vs. 71.8%; P = 0.150) and tumor-free survival (100% vs. 72.7% and 83.1% vs. 67.5%; P = 0.214) between IFN and control group were comparable. HCC recurrence was the most common cause of death (n = 6 of 12, 50%), all in the control group. During follow-up, seven (15.2%) patients developed HCC recurrence: one (4.1%) in the IFN group and six (27.3%) in the control group (P < 0.05). In conclusions, HCC recurrence rate and related deaths were significantly lower in patients that received post-transplant antiviral therapy for recurrent HCV. © 2011 European Society for Organ Transplantation.


Singhal A.,Nazih Zuhdi Transplant Institute | Huang Y.,Nazih Zuhdi Transplant Institute | Kohli V.,Nazih Zuhdi Transplant Institute
Hepatobiliary and Pancreatic Diseases International | Year: 2011

BACKGROUND: Laparoscopic liver resection is one of the most complex procedures in hepatobiliary surgery. In the last two decades, laparoscopic liver surgery has emerged as an option at major academic institutions. The purpose of this study is to describe the initial experience of minimally invasive liver resections at a non-academic institution. METHODS: We retrospectively reviewed medical records of patients undergoing laparoscopic liver resections between June 2006 and December 2009 at our center. Indications, technical aspects, and outcomes of these patients are described. RESULTS: Laparoscopic liver resection was attempted in 28 patients. Of these, 27 patients underwent laparoscopic liver resection (22 total laparoscopic and 5 hand assisted) and one needed conversion to open surgery. Twenty patients had a benign lesion and 8 had malignant lesions. Three patients had multiple lesions in different segments requiring separate resections. The lesions were located in segments II-III (n=18), IV (n=3), V-VI (n=9), and VII (n=1). Tumor size ranged from 1.5 cm to 8.5 cm. The surgical procedures included left lateral sectionectomy (n=17), left hepatectomy (n=2), sectionectomy (n=8), and local resections (n=4). Median operative time was 110 minutes (range 55-210 minutes), and the median length of hospital stay was 2.5 days (range 1-7 days). There was no perioperative mortality. One patient developed hernia at the site of tumor extraction requiring repair at 3 months. CONCLUSIONS: Laparoscopic liver resections can be safely performed in selected patients with benign and malignant liver tumors. With increasing experience, laparoscopic liver resections are likely to become a favorable alternative to open resection. © 2011, Hepatobiliary Pancreat Dis Int. All rights reserved.


Jabbour N.,Nazih Zuhdi Transplant Institute
Progress in transplantation (Aliso Viejo, Calif.) | Year: 2010

Given the complexity of solid organ transplantation, it is reasonable to believe that numerous factors are at play in achieving the enviable outcomes reported. The aim of this study is to examine the role of an organizational structure in maintaining the outcomes of a multiorgan transplant program at a nonacademic center. A retrospective analysis of 2378 solid organ transplants at Nazih Zuhdi Transplant Institute between March 1985 and December 2008 was performed. The 1-year and 3-year patient and graft survival rates, rate of retransplantation, and median length of hospital stay were compared with US national data released by the Scientific Registry of Transplant Recipients in January 2009. The 1-year patient survival rates were 87.5% for heart, 95.1% for kidney, 75.8% for lung, 89.6% for liver, and 100.0% for pancreas. The 3-year patient survival rates were 73.5% for heart, 89.7% for kidney, 57.8% for lung, 87.7% for liver, and 100.0% for pancreas. A well-structured transplant program along with competent medical, administrative, and ancillary support can achieve comparable patient and graft survival rates independent of volume.


Singhal A.,Nazih Zuhdi Transplant Institute | Shrago S.S.,Baptist Medical Center | Li S.-F.,Nazih Zuhdi Transplant Institute | Huang Y.,Nazih Zuhdi Transplant Institute | Kohli V.,Nazih Zuhdi Transplant Institute
Hepatobiliary and Pancreatic Diseases International | Year: 2010

BACKGROUND: Giant cell tumors are rare and highly malignant tumors of the pancreas. Based on two distinct cell populations, they have been divided into two subtypes corresponding to the osteoclast-like giant cell tumor and the pleomorphic giant cell carcinoma of the pancreas. Distinctive imaging features of the tumors remain uncharacterized. Surgical removal is the only appropriate treatment for them, but responses to chemotherapy or radiotherapy remain undocumented. METHODS: Clinical, radiological, histopathologic, and immuno-histochemical features of two cases of giant cell tumor of the pancreas are presented along with a brief review of the literature. RESULTS: En-bloc resection was done successfully in both cases. The patient with an osteoclast-like giant cell tumor remained disease-free with no clinical or radiological evidence of recurrence at 6 months after surgery. However, the patient with the pleomorphic type died 4 months later due to diffuse pulmonary metastasis. CONCLUSIONS: En-bloc surgical resection is the only appropriate treatment for giant cell tumors. The overall prognosis of these tumors is poorer than that of pancreatic ductal adenocarcinoma, especially the pleomorphic type. More studies are required to document the management and outcomes of the tumors. © 2010, Hepatobiliary Pancreat Dis Int.

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