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Thomas Kowalski

TitleAsst Professor
InstitutionThomas Jefferson University
DepartmentGastroenterology
Address132 S. 10th St.
Philadelphia PA 19107
Phone215-955-8900
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    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.
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    1. Kowalski T, Siddiqui A, Loren D, Mertz HR, Mallat D, Haddad N, Malhotra N, Sadowski B, Lybik MJ, Patel SN, Okoh E, Rosenkranz L, Karasik M, Golioto M, Linder J, Catalano MF, Al-Haddad MA. Management of Patients With Pancreatic Cysts: Analysis of Possible False-Negative Cases of Malignancy. J Clin Gastroenterol. 2016 Sep; 50(8):649-57. PMID: 27332745.
      View in: PubMed
    2. Siddiqui AA, Kowalski TE, Loren DE, Khalid A, Soomro A, Mazhar SM, Isby L, Kahaleh M, Karia K, Yoo J, Ofosu A, Ng B, Sharaiha RZ. Fully covered self-expanding metal stents versus lumen-apposing fully covered self-expanding metal stent versus plastic stents for endoscopic drainage of pancreatic walled-off necrosis: clinical outcomes and success. Gastrointest Endosc. 2016 Aug 24. PMID: 27566053.
      View in: PubMed
    3. Yang JF, Sharaiha RZ, Francis G, Karia K, Kistler CA, Laique SN, Hasan R, Gaidhane M, Tyberg A, Kahaleh M, Kowalski TE, Loren DE, Siddiqui A. Diagnostic accuracy of directed cholangioscopic biopsies and confocal laser endomicroscopy in cytology-negative indeterminate bile duct stricture: a multicenter comparison trial. Minerva Gastroenterol Dietol. 2016 Sep; 62(3):227-33. PMID: 27304199.
      View in: PubMed
    4. Korenblit J, Tholey DM, Tolin J, Loren D, Kowalski T, Adler DG, Davolos J, Siddiqui AA. Effect of the time of day and queue position in the endoscopic schedule on the performance characteristics of endoscopic ultrasound-guided fine-needle aspiration for diagnosing pancreatic malignancies. Endosc Ultrasound. 2016 Mar-Apr; 5(2):78-84. PMID: 27080605.
      View in: PubMed
    5. Loren D, Kowalski T, Siddiqui A, Jackson S, Toney N, Malhotra N, Haddad N. Influence of integrated molecular pathology test results on real-world management decisions for patients with pancreatic cysts: analysis of data from a national registry cohort. Diagn Pathol. 2016; 11(1):5. PMID: 26790950.
      View in: PubMed
    6. Siddiqui AA, Patel D, Kaplan J, Zabolotsky AH, Loren D, Kowalski T, Ghumman SS, Adler DG, Munigala S, Hayat U, Eloubeidi MA. Erratum to: A Trial of Rectal Indomethacin to Prevent Post-ERCP Pancreatitis in Patients with Suspected Type 3 Sphincter of Oddi Dysfunction. Dig Dis Sci. 2015 Nov; 60(11):3497. PMID: 26438337.
      View in: PubMed
    7. Siddiqui AA, Adler DG, Nieto J, Shah JN, Binmoeller KF, Kane S, Yan L, Laique SN, Kowalski T, Loren DE, Taylor LJ, Munigala S, Bhat YM. EUS-guided drainage of peripancreatic fluid collections and necrosis by using a novel lumen-apposing stent: a large retrospective, multicenter U.S. experience (with videos). Gastrointest Endosc. 2016 Apr; 83(4):699-707. PMID: 26515956.
      View in: PubMed
    8. Taunk P, Cosgrove N, Loren DE, Kowalski T, Siddiqui AA. Endoscopic ultrasound-guided gastroenterostomy using a lumen-apposing self-expanding metal stent for decompression of afferent loop obstruction. Endoscopy. 2015; 47 Suppl 1:E395-6. PMID: 26273778.
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    9. Al-Haddad MA, Kowalski T. Reply to barresi et Al. Endoscopy. 2015 Jun; 47(6):563. PMID: 26030893.
      View in: PubMed
    10. Al-Haddad MA, Kowalski T. Reply: To PMID 25314329. Gastroenterology. 2015 Jul; 149(1):251-2. PMID: 26028429.
      View in: PubMed
    11. Sharaiha RZ, DeFilippis EM, Kedia P, Gaidhane M, Boumitri C, Lim HW, Han E, Singh H, Ghumman SS, Kowalski T, Loren D, Kahaleh M, Siddiqui A. Metal versus plastic for pancreatic pseudocyst drainage: clinical outcomes and success. Gastrointest Endosc. 2015 Nov; 82(5):822-7. PMID: 25936453.
      View in: PubMed
    12. Siddiqui AA, Patel D, Kaplan J, Zabolotsky AH, Loren D, Kowalski T, Ghumman SS, Adler DG, Munigal S, Hayat U, Eloubeidi MA. A Trial of Rectal Indomethacin to Prevent Post-ERCP Pancreatitis in Patients with Suspected Type 3 Sphincter of Oddi Dysfunction. Dig Dis Sci. 2015 Aug; 60(8):2509-15. PMID: 25868629.
      View in: PubMed
    13. Siddiqui AA, Shahid H, Shah A, Khurana T, Huntington W, Ghumman SS, Loren DE, Kowalski TE, Laique S, Hayat U, Eloubeidi MA. High risk of acute pancreatitis after endoscopic ultrasound-guided fine needle aspiration of side branch intraductal papillary mucinous neoplasms. Endosc Ultrasound. 2015 Apr-Jun; 4(2):109-14. PMID: 26020044.
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    14. Al-Haddad MA, Kowalski T, Siddiqui A, Mertz HR, Mallat D, Haddad N, Malhotra N, Sadowski B, Lybik MJ, Patel SN, Okoh E, Rosenkranz L, Karasik M, Golioto M, Linder J, Catalano MF. Integrated molecular pathology accurately determines the malignant potential of pancreatic cysts. Endoscopy. 2015 Feb; 47(2):136-46. PMID: 25314329.
      View in: PubMed
    15. Shah RJ, Shah JN, Waxman I, Kowalski TE, Sanchez-Yague A, Nieto J, Brauer BC, Gaidhane M, Kahaleh M. Safety and efficacy of endoscopic ultrasound-guided drainage of pancreatic fluid collections with lumen-apposing covered self-expanding metal stents. Clin Gastroenterol Hepatol. 2015 Apr; 13(4):747-52. PMID: 25290534.
      View in: PubMed
    16. Shahid H, Korenblit J, Kowalski T, Loren DE, Siddiqui AA. Novel application of electrohydraulic lithotripsy probe in managing a refractory cystic duct bile leak. Gastrointest Endosc. 2014 Oct; 80(4):744-5. PMID: 25220517.
      View in: PubMed
    17. Siddiqui AA, Jones E, Andrade D, Shah A, Kowalski TE, Loren DE, Chipitsyna G, Arafat HA. Osteopontin splice variant as a potential marker for metastatic disease in pancreatic adenocarcinoma. J Gastroenterol Hepatol. 2014 Jun; 29(6):1321-7. PMID: 24548099.
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    18. Moses PL, Alnaamani KM, Barkun AN, Gordon SR, Mitty RD, Branch MS, Kowalski TE, Martel M, Adam V. Randomized trial in malignant biliary obstruction: Plastic vs partially covered metal stents. World J Gastroenterol. 2013 Dec 14; 19(46):8638-46. PMID: 24379581.
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    19. Siddiqui AA, Easler J, Strongin A, Slivka A, Kowalski TE, Muddana V, Chennat J, Baron TH, Loren DE, Papachristou GI. Hydrogen peroxide-assisted endoscopic necrosectomy for walled-off pancreatic necrosis: a dual center pilot experience. Dig Dis Sci. 2014 Mar; 59(3):687-90. PMID: 24282052.
      View in: PubMed
    20. Finkelstein SD, Bibbo M, Kowalski TE, Loren DE, Siddiqui AA, Solomides C, Ellsworth E. Mutational analysis of cytocentrifugation supernatant fluid from pancreatic solid mass lesions. Diagn Cytopathol. 2014 Aug; 42(8):719-25. PMID: 24265269.
      View in: PubMed
    21. Kahaleh M, Talreja JP, Loren DE, Kowalski TE, Poneros JM, Degaetani M, Raijman I, Sejpal DV, Patel S, Rosenkranz L, McNamara KN, Brijbassie A, Wang AY, Gaidhane M, Sethi A, Stevens PD. Evaluation of a fully covered self-expanding metal stent with flared ends in malignant biliary obstruction: a multicenter study. J Clin Gastroenterol. 2013 Nov-Dec; 47(10):e96-100. PMID: 23933803.
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    22. Kahaleh M, Brijbassie A, Sethi A, Degaetani M, Poneros JM, Loren DE, Kowalski TE, Sejpal DV, Patel S, Rosenkranz L, McNamara KN, Raijman I, Talreja JP, Gaidhane M, Sauer BG, Stevens PD. Multicenter trial evaluating the use of covered self-expanding metal stents in benign biliary strictures: time to revisit our therapeutic options? J Clin Gastroenterol. 2013 Sep; 47(8):695-9. PMID: 23442836.
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    23. Siddiqui A, Shahid H, Sarkar A, Cox K, Kowalski TE, Loren DE, Sharma A, Laing P, Birch M, Adler DG. Stage of hilar cholangiocarcinoma predicts recurrence of biliary obstruction in patients with metal stents. Clin Gastroenterol Hepatol. 2013 Sep; 11(9):1169-73. PMID: 23811239.
      View in: PubMed
    24. Siddiqui AA, Dewitt JM, Strongin A, Singh H, Jordan S, Loren DE, Kowalski T, Eloubeidi MA. Outcomes of EUS-guided drainage of debris-containing pancreatic pseudocysts by using combined endoprosthesis and a nasocystic drain. Gastrointest Endosc. 2013 Oct; 78(4):589-95. PMID: 23660566.
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    25. Beltz S, Sarkar A, Loren DE, Andrel J, Kowalski T, Siddiqui AA. Risk Stratification for the Development of Post-ERCP Pancreatitis by Sphincter of Oddi Dysfunction Classification. South Med J. 2013 May; 106(5):298-302. PMID: 23644636.
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    26. Siddiqui AA, Kowalski TE, Kedika R, Roy A, Loren DE, Ellsworth E, Adler D, Finkelstein SD. EUS-guided pancreatic fluid aspiration for DNA analysis of KRAS and GNAS mutations for the evaluation of pancreatic cystic neoplasia: a pilot study. Gastrointest Endosc. 2013 Apr; 77(4):669-70. PMID: 23498145.
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    27. Petersen BT, Kahaleh M, Kozarek RA, Loren D, Gupta K, Kowalski T, Freeman M, Chen YK, Branch MS, Edmundowicz S, Gluck M, Binmoeller K, Baron TH, Shah RJ, Kinney T, Ross W, Jowell P, Carr-Locke D. A multicenter, prospective study of a new fully covered expandable metal biliary stent for the palliative treatment of malignant bile duct obstruction. Gastroenterol Res Pract. 2013; 2013:642428. PMID: 23606835.
      View in: PubMed
    28. Patel D, Loren D, Kowalski T, Siddiqui AA. Pancreatic tuberculosis mimicking malignancy diagnosed with endoscopic ultrasound-guided fine needle aspiration. Endosc Ultrasound. 2013 Jan; 2(1):38-40. PMID: 24949364.
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    29. Siddiqui AA, Mehendiratta V, Loren D, Kowalski T, Fang J, Hilden K, Adler DG. Self-Expanding Metal Stents (SEMS) for Preoperative Biliary Decompression in Patients with Resectable and Borderline-Resectable Pancreatic Cancer: Outcomes in 241 Patients. Dig Dis Sci. 2013 Jun; 58(6):1744-50. PMID: 23179157.
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    30. Lewis JJ, Kowalski TE. Endoscopic ultrasound and fine needle aspiration in pancreatic cancer. Cancer J. 2012 Nov; 18(6):523-9. PMID: 23187838.
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    31. Siddiqui AA, Chaaya A, Shelton C, Marmion J, Kowalski TE, Loren DE, Heller SJ, Haluszka O, Adler DG, Tokar JL. Utility of the Short Double-Balloon Enteroscope to Perform Pancreaticobiliary Interventions in Patients with Surgically Altered Anatomy in a US Multicenter Study. Dig Dis Sci. 2013 Mar; 58(3):858-64. PMID: 22975796.
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    32. Siddiqui AA, Tholey D, Kedika R, Loren DE, Kowalski TE, Eloubeidi MA. Low but significant yield of endosonography in patients with suspected Sphincter of Oddi Dysfunction Type III with normal imaging studies. J Gastrointestin Liver Dis. 2012 Sep; 21(3):271-5. PMID: 23012668.
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    33. Finkelstein SD, Bibbo M, Loren DE, Siddiqui AA, Solomides C, Kowalski TE, Ellsworth E. Molecular analysis of centrifugation supernatant fluid from pancreaticobiliary duct samples can improve cancer detection. Acta Cytol. 2012; 56(4):439-47. PMID: 22846349.
      View in: PubMed
    34. Siddiqui AA, Sarkar A, Beltz S, Lewis J, Loren D, Kowalski T, Fang J, Hilden K, Adler DG. Placement of fully covered self-expandable metal stents in patients with locally advanced esophageal cancer before neoadjuvant therapy. Gastrointest Endosc. 2012 Jul; 76(1):44-51. PMID: 22726465.
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    35. Siddiqui AA, Fein M, Kowalski TE, Loren DE, Eloubeidi MA. Comparison of the influence of plastic and fully covered metal biliary stents on the accuracy of EUS-FNA for the diagnosis of pancreatic cancer. Dig Dis Sci. 2012 Sep; 57(9):2438-45. PMID: 22526586.
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    36. Hong SK, Loren DE, Rogart JN, Siddiqui AA, Sendecki JA, Bibbo M, Coben RM, Meckes DP, Kowalski TE. Targeted cyst wall puncture and aspiration during EUS-FNA increases the diagnostic yield of premalignant and malignant pancreatic cysts. Gastrointest Endosc. 2012 Apr; 75(4):775-82. PMID: 22317883.
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    37. Siddiqui AA, Mehendiratta V, Jackson W, Loren DE, Kowalski TE, Eloubeidi MA. Identification of cholangiocarcinoma by using the Spyglass Spyscope system for peroral cholangioscopy and biopsy collection. Clin Gastroenterol Hepatol. 2012 May; 10(5):466-71; quiz e48. PMID: 22178463.
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    38. Orfanidis NT, Loren DE, Santos C, Kennedy EP, Siddiqui AA, Lavu H, Yeo CJ, Kowalski TE. Extended follow-up and outcomes of patients undergoing pancreaticoduodenectomy for nonmalignant disease. J Gastrointest Surg. 2012 Jan; 16(1):80-7; discussion 87-8. PMID: 22058043.
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    39. Siddiqui AA, Mehendiratta V, Loren D, Hong SK, Kowalski T. Fully covered self-expandable metal stents are effective and safe to treat distal malignant biliary strictures, irrespective of surgical resectability status. J Clin Gastroenterol. 2011 Oct; 45(9):824-7. PMID: 21921846.
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    40. Siddiqui AA, Kowalski TE, Shahid H, O'Donnell S, Tolin J, Loren DE, Infantolino A, Hong SK, Eloubeidi MA. False-positive EUS-guided FNA cytology for solid pancreatic lesions. Gastrointest Endosc. 2011 Sep; 74(3):535-40. PMID: 21737075.
      View in: PubMed
    41. Siddiqui AA, Brown LJ, Hong SK, Draganova-Tacheva RA, Korenblit J, Loren DE, Kowalski TE, Solomides C. Relationship of pancreatic mass size and diagnostic yield of endoscopic ultrasound-guided fine needle aspiration. Dig Dis Sci. 2011 Nov; 56(11):3370-5. PMID: 21688127.
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    42. Petersen BT, Chennat J, Cohen J, Cotton PB, Greenwald DA, Kowalski TE, Krinsky ML, Park WG, Pike IM, Romagnuolo J. Multisociety guideline on reprocessing flexible GI endoscopes: 2011. Infect Control Hosp Epidemiol. 2011 Jun; 32(6):527-37. PMID: 21558764.
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    43. Multisociety guideline on reprocessing flexible gastrointestinal endoscopes: 2011. Gastrointest Endosc. 2011 Jun; 73(6):1075-84. PMID: 21628008.
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    44. Rogart JN, Loren DE, Singu BS, Kowalski TE. Cyst wall puncture and aspiration during EUS-guided fine needle aspiration may increase the diagnostic yield of mucinous cysts of the pancreas. J Clin Gastroenterol. 2011 Feb; 45(2):164-9. PMID: 20818233.
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    45. Toll AD, Kowalski T, Loren D, Bibbo M. The added value of molecular testing in small pancreatic cysts. JOP. 2010; 11(6):582-6. PMID: 21068490.
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    46. Kowalski T, Nathwani RA, Assis D, Salese L, Banwait K, Loren D. Post-sphincterotomy transampullary balloon dilation is a safe and effective technique. Dig Dis Sci. 2009 Mar; 54(3):670-4. PMID: 18594970.
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    47. Nathwani RA, Kenyon L, Kowalski T. Rosai-Dorfman disease of the colon. Gastrointest Endosc. 2008 Jul; 68(1):194-6. PMID: 18291397.
      View in: PubMed
    48. Nathwani RA, Kowalski T. Endoscopic stenting of esophageal cancer: the clinical impact. Curr Opin Gastroenterol. 2007 Sep; 23(5):535-8. PMID: 17762559.
      View in: PubMed
    49. Training in patient monitoring and sedation and analgesia. Gastrointest Endosc. 2007 Jul; 66(1):7-10. PMID: 17591466.
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    50. Sanaka MR, Kowalski TE, Brotz C, Yeo CJ, McCue P, Palazzo J. Solid serous adenoma of the pancreas: a rare form of serous cystadenoma. Dig Dis Sci. 2007 Nov; 52(11):3154-6. PMID: 17393319.
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    51. Sanaka MR, Kowalski TE. Cystic lymphangioma of the pancreas. Clin Gastroenterol Hepatol. 2007 Mar; 5(3):e10-1. PMID: 17368224.
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    52. Siddiqui AA, Loren D, Dudnick R, Kowalski T. Expandable polyester silicon-covered stent for malignant esophageal strictures before neoadjuvant chemoradiation: a pilot study. Dig Dis Sci. 2007 Mar; 52(3):823-9. PMID: 17253137.
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    53. Siddiqui AA, Kowalski T, Cohen S. Closure of a nonhealing gastrocutaneous fistula using an endoscopic clip. South Med J. 2007 Jan; 100(1):75-6. PMID: 17269533.
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    54. Cotton PB, Barkun A, Ginsberg G, Hawes RH, Atkin W, Bjorkman DJ, Dykes C, Elta G, Farrell J, Fleischer D, Ganz R, Glenn T, Janowski D, Johnson D, Kochman M, Kowalski T, Megibow AJ, McQuaid K, Sasa H, Thompson CC, Vargo J, Woods K. Diagnostic endoscopy: 2020 vision. Gastrointest Endosc. 2006 Sep; 64(3):395-8. PMID: 16923489.
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    55. Kowalski T, Edmundowicz S, Vacante N. Endoscopy unit form and function. Gastrointest Endosc Clin N Am. 2004 Oct; 14(4):657-66, viii. PMID: 15363770.
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    56. Fayad LM, Holland GA, Bergin D, Iqbal N, Parker L, Curcillo PG, Kowalski TE, Park P, Intenzo C, Mitchell DG. Functional magnetic resonance cholangiography (fMRC) of the gallbladder and biliary tree with contrast-enhanced magnetic resonance cholangiography. J Magn Reson Imaging. 2003 Oct; 18(4):449-60. PMID: 14508782.
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    57. Kowalski T, Kanchana T, Pungpapong S. Perceptions of gastroenterology fellows regarding ERCP competency and training. Gastrointest Endosc. 2003 Sep; 58(3):345-9. PMID: 14528206.
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    58. Fayad LM, Kowalski T, Mitchell DG. MR cholangiopancreatography: evaluation of common pancreatic diseases. Radiol Clin North Am. 2003 Jan; 41(1):97-114. PMID: 12630688.
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    59. tenBerge J, Hoffman BJ, Hawes RH, Van Enckevort C, Giovannini M, Erickson RA, Catalano MF, Fogel R, Mallery S, Faigel DO, Ferrari AP, Waxman I, Palazzo L, Ben-Menachem T, Jowell PS, McGrath KM, Kowalski TE, Nguyen CC, Wassef WY, Yamao K, Chak A, Greenwald BD, Woodward TA, Vilmann P, Sabbagh L, Wallace MB. EUS-guided fine needle aspiration of the liver: indications, yield, and safety based on an international survey of 167 cases. Gastrointest Endosc. 2002 Jun; 55(7):859-62. PMID: 12024141.
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