Alan Norman Langnas, DO

  • 10227 Citations
  • 53 h-Index
1989 …2020

Research output per year

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Research Output

2020

Immune function and infectious complications in children with jejunoileal atresia

Prachuapthunyachart, S., Merani, S., Cloonan, M., Langnas, A. N., Quiros-Tejeira, R. E. & Vo, H. D., 2020, (Accepted/In press) In : Journal of pediatric surgery.

Research output: Contribution to journalArticle

Including colon in intestinal transplantation: a focus on post-transplant renal function – a retrospective study

Ewald, C., Swanson, B. J., Vargas, L., Grant, W. J., Mercer, D. F., Langnas, A. N. & Merani, S., Feb 1 2020, In : Transplant International. 33, 2, p. 142-148 7 p.

Research output: Contribution to journalArticle

Pathologic Response to Pretransplant Locoregional Therapy is Predictive of Patient Outcome After Liver Transplantation for Hepatocellular Carcinoma: Analysis From the US Multicenter HCC Transplant Consortium

DiNorcia, J., Florman, S. S., Haydel, B., Tabrizian, P., Ruiz, R. M., Klintmalm, G. B., Senguttuvan, S., Lee, D. D., Taner, C. B., Verna, E. C., Halazun, K. J., Hoteit, M., Levine, M. H., Chapman, W. C., Vachharajani, N., Aucejo, F., Nguyen, M. H., Melcher, M. L., Tevar, A. D., Humar, A. & 20 others, Mobley, C., Ghobrial, M., Nydam, T. L., Amundsen, B., Markmann, J. F., Berumen, J., Hemming, A. W., Langnas, A. N., Carney, C. A., Sudan, D. L., Hong, J. C., Kim, J., Zimmerman, M. A., Rana, A., Kueht, M. L., Jones, C. M., Fishbein, T. M., Markovic, D., Busuttil, R. W. & Agopian, V. G., Apr 1 2020, In : Annals of surgery. 271, 4, p. 616-624 9 p.

Research output: Contribution to journalArticle

3 Scopus citations

Viral enteritis in intestinal transplant recipients

Servais, A. M., Keck, M., Leick, M., Mercer, D. F., Langnas, A. N., Grant, W. J., Vargas, L. M., Merani, S. & Florescu, D. F., Apr 1 2020, In : Transplant Infectious Disease. 22, 2, e13248.

Research output: Contribution to journalArticle

2019

Failure of abdominal wall closure after intestinal transplantation: Identifying high-risk recipients

Cloonan, M. R., Fortina, C. A., Mercer, D. F., Vargas, L. M., Grant, W. J., Langnas, A. N. & Merani, S., Nov 1 2019, In : Clinical Transplantation. 33, 11, e13713.

Research output: Contribution to journalArticle

Gendered Differences in Letters of Recommendation for Transplant Surgery Fellowship Applicants

Hoffman, A., Grant, W., McCormick, M., Jezewski, E., Matemavi, P. & Langnas, A., Mar 1 2019, In : Journal of Surgical Education. 76, 2, p. 427-432 6 p.

Research output: Contribution to journalArticle

12 Scopus citations

Multiorgan transplantation as a viable treatment option in infantile juvenile polyposis syndrome

Chandan, O. C., Reyes-Santiago, E., Vargas, L., Mercer, D., Grant, W., Langnas, A., Quiros-Tejeira, R. E. & Vo, H., May 1 2019, In : Journal of pediatric gastroenterology and nutrition. 68, 5, p. E86-E87

Research output: Contribution to journalArticle

2018
3 Scopus citations

Invasive pneumococcal infections in pediatric liver-small bowel-pancreas transplant recipients

Vo, H. D., Florescu, D. F., Brown, C. R., Chambers, H. E., Mercer, D. F., Vargas, L. M., Grant, W. J., Langnas, A. N. & Quiros, R., May 2018, In : Pediatric Transplantation. 22, 3, e13165.

Research output: Contribution to journalArticle

1 Scopus citations
2 Scopus citations
2017

Impact of Pretransplant Bridging Locoregional Therapy for Patients with Hepatocellular Carcinoma Within Milan Criteria Undergoing Liver Transplantation: Analysis of 3601 Patients from the US Multicenter HCC Transplant Consortium

Agopian, V. G., Harlander-Locke, M. P., Ruiz, R. M., Klintmalm, G. B., Senguttuvan, S., Florman, S. S., Haydel, B., Hoteit, M., Levine, M. H., Lee, D. D., Taner, C. B., Verna, E. C., Halazun, K. J., Abdelmessih, R., Tevar, A. D., Humar, A., Aucejo, F., Chapman, W. C., Vachharajani, N., Nguyen, M. H. & 19 others, Melcher, M. L., Nydam, T. L., Mobley, C., Ghobrial, R. M., Amundsen, B., Markmann, J. F., Langnas, A. N., Carney, C. A., Berumen, J., Hemming, A. W., Sudan, D. L., Hong, J. C., Kim, J., Zimmerman, M. A., Rana, A., Kueht, M. L., Jones, C. M., Fishbein, T. M. & Busuttil, R. W., Sep 1 2017, In : Annals of surgery. 266, 3, p. 525-535 11 p.

Research output: Contribution to journalArticle

44 Scopus citations

Risk of Intestinal Malignancy in Patients with Short Bowel Syndrome

Thompson, J. S., Weseman, R. A., Mercer, D. F., Rochling, F. A., Vargas, L. M., Grant, W. J. & Langnas, A. N., May 1 2017, In : Journal of Parenteral and Enteral Nutrition. 41, 4, p. 562-565 4 p.

Research output: Contribution to journalArticle

2 Scopus citations
2016

Cholecystectomy and Liver Disease in Short Bowel Syndrome

Thompson, J. S., Weseman, R. A., Rochling, F. A., Lyden, E., Grant, W. J., Vargas, L. M., Langnas, A. N. & Mercer, D. F., Feb 1 2016, In : Journal of Gastrointestinal Surgery. 20, 2, p. 322-327 6 p.

Research output: Contribution to journalArticle

3 Scopus citations
2015

AST/ASTS workshop on increasing organ donation in the United States: Creating an "arc of change" from Removing disincentives to testing incentives

Salomon, D. R., Langnas, A. N., Reed, A. I., Bloom, R. D., Magee, J. C. & Gaston, R. S., May 1 2015, In : American Journal of Transplantation. 15, 5, p. 1173-1179 7 p.

Research output: Contribution to journalArticle

38 Scopus citations

Compensating the transplant professional: Time for a model change

Abouljoud, M., Whitehouse, S., Langnas, A. & Brown, K., Mar 1 2015, In : American Journal of Transplantation. 15, 3, p. 601-605 5 p.

Research output: Contribution to journalReview article

4 Scopus citations

Intestinal and Multivisceral Transplantation

Bathla, L. & Langnas, A., Jan 28 2015, Transplantation of the Liver: Third Edition. Elsevier Inc., p. 818-834 17 p.

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Scopus citations

Intestinal transplant registry report: Global activity and trends

Grant, D., Abu-Elmagd, K., Mazariegos, G., Vianna, R., Langnas, A., Mangus, R., Farmer, D. G., Lacaille, F., Iyer, K. & Fishbein, T., Jan 1 2015, In : American Journal of Transplantation. 15, 1, p. 210-219 10 p.

Research output: Contribution to journalArticle

172 Scopus citations
47 Scopus citations
2014

Impact of Anti-Thymocyte Globulin During Immunosuppression Induction in Patients with Hepatitis C After Liver Transplantation

Garcia-Saenz-de-Sicilia, M., Olivera-Martinez, M. A., Grant, W. J., Mercer, D. F., Baojjang, C., Langnas, A. & McCashland, T., Nov 18 2014, In : Digestive Diseases and Sciences. 59, 11, p. 2804-2812 9 p.

Research output: Contribution to journalArticle

7 Scopus citations

Intestinal transplantation in children with multiple intestinal atresias and immunodeficiency

Fischer, R. T., Friend, B., Talmon, G. A., Grant, W. J., Quiros-Tejeira, R. E., Langnas, A. N. & Coccia, P. F., Mar 2014, In : Pediatric Transplantation. 18, 2, p. 190-196 7 p.

Research output: Contribution to journalArticle

13 Scopus citations

Paediatric liver transplantation in Johannesburg revisited: 59 transplants and challenges met

Loveland, J., Britz, R., Joseph, C., Sparaco, A., Zuckerman, M., Langnas, A., Schleicher, G., Strobele, B., Moshesh, P. & Botha, J., 2014, In : South African Medical Journal. 104, 11, p. 799-802 4 p.

Research output: Contribution to journalArticle

6 Scopus citations
4 Scopus citations

Pre-resection gastric bypass reduces post-resection body mass index but not liver disease in short bowel syndrome

Thompson, J. S., Weseman, R. A., Rochling, F. A., Grant, W. J., Botha, J. F., Langnas, A. N. & Mercer, D. F., Jun 2014, In : American journal of surgery. 207, 6, p. 942-948 7 p.

Research output: Contribution to journalArticle

2 Scopus citations
4 Scopus citations

Serial transverse enteroplasty allows children with short bowel to wean from parenteral nutrition

Mercer, D. F., Hobson, B. D., Gerhardt, B. K., Grant, W. J., Vargas, L. M., Langnas, A. N. & Quiros-Tejeira, R. E., Jan 2014, In : Journal of Pediatrics. 164, 1, p. 93-98 6 p.

Research output: Contribution to journalArticle

30 Scopus citations
2013

Hepatic fibrosis persists and progresses despite biochemical improvement in children treated with intravenous fish oil emulsion

Mercer, D. F., Hobson, B. D., Fischer, R. T., Talmon, G. A., Perry, D. A., Gerhardt, B. K., Grant, W. J., Botha, J. F., Langnas, A. N. & Quiros-Tejeira, R. E., Apr 2013, In : Journal of pediatric gastroenterology and nutrition. 56, 4, p. 364-369 6 p.

Research output: Contribution to journalArticle

48 Scopus citations

Left lobe liver transplants

Bathla, L., Vargas, L. M. & Langnas, A., Dec 2013, In : Surgical Clinics of North America. 93, 6, p. 1325-1342 18 p.

Research output: Contribution to journalReview article

1 Scopus citations

Opportunistic viral infections in intestinal transplantation

Florescu, D. F., Langnas, A. N. & Sandkovsky, U., Apr 2013, In : Expert Review of Anti-Infective Therapy. 11, 4, p. 367-381 15 p.

Research output: Contribution to journalReview article

7 Scopus citations
21 Scopus citations

Successful rehabilitation in pediatric ultrashort small bowel syndrome

Infantino, B. J., Mercer, D. F., Hobson, B. D., Fischer, R. T., Gerhardt, B. K., Grant, W. J., Langnas, A. N. & Quiros-Tejeira, R. E., Nov 2013, In : Journal of Pediatrics. 163, 5, p. 1361-1366 6 p.

Research output: Contribution to journalArticle

43 Scopus citations
2012

Bloodstream infections during the first year after pediatric small bowel transplantation

Florescu, D. F., Qiu, F., Langnas, A. N., Mercer, D. F., Chambers, H., Hill, L. A., Qaragholi, N. & Kalil, A. C., Jul 2012, In : Pediatric Infectious Disease Journal. 31, 7, p. 700-704 5 p.

Research output: Contribution to journalReview article

27 Scopus citations

Diastolic dysfunction in patients with end-stage liver disease is associated with development of heart failure early after liver transplantation

Dowsley, T. F., Bayne, D. B., Langnas, A. N., Dumitru, I., Windle, J. R., Porter, T. R. & Raichlin, E., Sep 27 2012, In : Transplantation. 94, 6, p. 646-651 6 p.

Research output: Contribution to journalArticle

47 Scopus citations

Incentives for organ donation: Proposed standards for an internationally acceptable system

Working Group on Incentives for Living Donation, Feb 1 2012, In : American Journal of Transplantation. 12, 2, p. 306-312 7 p.

Research output: Contribution to journalArticle

60 Scopus citations

Incidence, risk factors, and outcomes associated with cytomegalovirus disease in small bowel transplant recipients

Florescu, D. F., Langnas, A. N., Grant, W., Mercer, D. F., Botha, J., Qiu, F., Shafer, L. & Kalil, A. C., May 2012, In : Pediatric Transplantation. 16, 3, p. 294-301 8 p.

Research output: Contribution to journalArticle

25 Scopus citations

Preresection obesity increases the risk of hepatobiliary complications in short bowel syndrome

Thompson, J. S., Weseman, R. A., Rochling, F. A., Grant, W. J., Botha, J. F., Langnas, A. N. & Mercer, D. F., Oct 2012, In : Nutrients. 4, 10, p. 1358-1366 9 p.

Research output: Contribution to journalReview article

4 Scopus citations
2 Scopus citations

Risk factors for systemic Candida infections in pediatric small bowel transplant recipients

Florescu, D. F., Qiu, F., Mercer, D. F., Langnas, A. N., Shafer, L. R. & Kalil, A. C., Feb 2012, In : Pediatric Infectious Disease Journal. 31, 2, p. 120-123 4 p.

Research output: Contribution to journalArticle

9 Scopus citations

Risk of cytomegalovirus disease in high-risk liver transplant recipients on valganciclovir prophylaxis: A systematic review and meta-Analysis

Kalil, A. C., Mindru, C., Botha, J. F., Grant, W. J., Mercer, D. F., Olivera, M. A., McCartan, M. A., McCashland, T. M., Langnas, A. N. & Florescu, D. F., Dec 2012, In : Liver Transplantation. 18, 12, p. 1440-1447 8 p.

Research output: Contribution to journalReview article

24 Scopus citations

Rurality and other factors associated with adherence to immunosuppressant medications in community-dwelling solid-organ transplant recipients

Sankaranarayanan, J., Collier, D., Furasek, A., Reardon, T., Smith, L. M., McCartan, M. & Langnas, A. N., May 2012, In : Research in Social and Administrative Pharmacy. 8, 3, p. 228-239 12 p.

Research output: Contribution to journalArticle

16 Scopus citations

Staphylococcus aureus infections after liver transplantation

Florescu, D. F., McCartney, A. M., Qiu, F., Langnas, A. N., Botha, J., Mercer, D. F., Grant, W. & Kalil, A. C., Jun 2012, In : Infection. 40, 3, p. 263-269 7 p.

Research output: Contribution to journalArticle

15 Scopus citations

Surgical treatment of intra-abdominal desmoid tumors resulting in short bowel syndrome

Wheeler, M., Mercer, D., Grant, W., Botha, J., Langnas, A. & Thompson, J., Mar 2012, In : Cancers. 4, 1, p. 31-38 8 p.

Research output: Contribution to journalReview article

7 Scopus citations
2011

Implementation of vascularized composite allografts in the United States: Recommendations from the ASTS VCA Ad Hoc committee and the executive committee

Cendales, L., Granger, D., Henry, M., Jones, J., Langnas, A., Levi, D., Magee, J., Merion, R., Olthoff, K., Pruett, T., Roberts, J. & Abecassis, M., Jan 2011, In : American Journal of Transplantation. 11, 1, p. 13-17 5 p.

Research output: Contribution to journalArticle

25 Scopus citations

Massive small bowel resection during pregnancy causing short bowel syndrome

Boland, E., Thompson, J. S., Grant, W. J., Botha, J., Langnas, A. N. & Mercer, D. F., Dec 2011, In : American Surgeon. 77, 12, p. 1589-1592 4 p.

Research output: Contribution to journalArticle

5 Scopus citations

Radiation therapy increases the risk of hepatobiliary complications in short bowel syndrome

Thompson, J. S., Weseman, R., Rochling, F., Grant, W., Botha, J., Langnas, A. & Mercer, D., Aug 2011, In : Nutrition in Clinical Practice. 26, 4, p. 474-478 5 p.

Research output: Contribution to journalReview article

11 Scopus citations

Stool calprotectin monitoring after small intestine transplantation

Mercer, D. F., Vargas, L., Sun, Y., Moreno, A. M. A., Grant, W. J., Botha, J. F., Langnas, A. N. & Sudan, D. L., May 27 2011, In : Transplantation. 91, 10, p. 1166-1171 6 p.

Research output: Contribution to journalArticle

19 Scopus citations
2010

Adenovirus infections in pediatric small bowel transplant recipients

Florescu, D. F., Islam, M. K., Mercer, D. F., Grant, W., Langnas, A. N., Freifeld, A. G., Sudan, D., Basappa, R., Dimaio, D. & Kalil, A. C., Jul 27 2010, In : Transplantation. 90, 2, p. 198-204 7 p.

Research output: Contribution to journalArticle

41 Scopus citations

Incidence and outcome of fungal infections in pediatric small bowel transplant recipients

Florescu, D. F., Islam, K. M., Grant, W., Mercer, D. F., Langnas, A., Botha, J., Nielsen, B. & Kalil, A. C., Dec 2010, In : Transplant Infectious Disease. 12, 6, p. 497-504 8 p.

Research output: Contribution to journalArticle

20 Scopus citations

Intestinal Lengthening in Adult Patients with Short Bowel Syndrome

Yannam, G. R., Sudan, D. L., Grant, W., Botha, J., Langnas, A. & Thompson, J. S., Dec 2010, In : Journal of Gastrointestinal Surgery. 14, 12, p. 1931-1936 6 p.

Research output: Contribution to journalArticle

36 Scopus citations

Intestine transplantation in the United States, 1999-2008: Special feature

Mazariegos, G. V., Steffick, D. E., Horslen, S., Farmer, D., Fryer, J., Grant, D., Langnas, A. & Magee, J. C., Apr 2010, In : American Journal of Transplantation. 10, 4 PART 2, p. 1020-1034 15 p.

Research output: Contribution to journalReview article

91 Scopus citations