Ms Tamara Glyn, Our people, University of Otago, Christchurch

Senior Lecturer
General Surgeon

MB ChB(Auc) FRACS

Tamara Glyn is a general and colorectal surgeon with a particular interest in inflammatory bowel disease and colorectal cancer. She completed a Bachelor of Science (Psychology) followed by a Postgraduate Diploma (Pharmacology) before undertaking medical training, graduating with an MB ChB from the University of Auckland in 2007. Tamara trained in general surgery in South Auckland, Palmerston North and Whangarei, being awarded her FRACS in 2014.

She completed the International Fellowship in Colon and Rectal Surgery at the Mayo Clinic (Rochester MN, USA) in 2015 and subsequently spent two further years as a CSSANZ fellow at St Vincent's Hospital (Melbourne, Australia) and St James Teaching Hospital (Leeds, UK).

Publications

Waddell, O., McCombie, A., Keenan, J., Frizelle, F., Glyn, T., & Pearson, J. (2025). Early-onset colorectal cancer: Diagnostic pathways and their impact on outcomes. ANZ Journal of Surgery, 95(Suppl. 1), CR071P. doi: 10.1111/ans.70063 Conference Contribution - Published proceedings: Abstract

Kumar, S., McCombie, A., Richards, S., Bone, E., Glyn, T., & Eglinton, T. (2025). CT colonography performs poorly in detection of sessile serrated lesions. ANZ Journal of Surgery, 95(Suppl. 1), CR059P. doi: 10.1111/ans.70063 Conference Contribution - Published proceedings: Abstract

Waddell, O., McCombie, A., Keenan, J., Pearson, J., Glyn, T., & Frizelle, F. (2025). A prospective cohort study of quality of life in early-onset colorectal cancer. ANZ Journal of Surgery, 95(Suppl. 1), CR029P. doi: 10.1111/ans.70063 Conference Contribution - Published proceedings: Abstract

Joshi, S., Hanna, L., Cho, D. H., Garg, P., Glyn, T., Gurland, B., … Tozer, P. J. (2025). The Songdo consensus: Development of minimum reporting standards for studies of intervention in idiopathic anal fistula using a modified nominal group technique. Colorectal Disease, 27, e17300. doi: 10.1111/codi.17300 Journal - Research Article

Glyn, T. (2024). Inflammatory bowel disease associated colorectal cancer (PhD). University of Otago, Dunedin, New Zealand. Retrieved from https://hdl.handle.net/10523/44034 Awarded Doctoral Degree

2025

Journal - Research Article

Conference Contribution - Published proceedings: Abstract

2024

Journal - Research Article

Thompson, N., Waddell, O., McCombie, A., Frizelle, F., & Glyn, T. (2024). Treatment patterns in metastatic early-onset rectal cancer. ANZ Journal of Surgery. Advance online publication. doi: 10.1111/ans.19329

Thompson, N., Glyn, T., Kerridge, D., & Koea, J. (2024). Fostering collaboration: An exploration of knowledge exchange between Rongoā Māori practitioners and surgical clinicians. ANZ Journal of Surgery. Advance online publication. doi: 10.1111/ans.19238

Bone, E., Kumar, S., Richards, S., McCombie, A., Chalmers-Watson, T., Glyn, T., & Eglinton, T. (2024). Current sessile serrated lesion incidence: Implications for future clinical practice. ANZ Journal of Surgery. Advance online publication. doi: 10.1111/ans.19200

Wall, C. L., Bensley, R., Glyn, T., Haines, M., Rowbotham, D., Bissett, I., Eglinton, T., & Gearry, R. B. (2024). Preoperative Crohn's disease exclusion diet and exclusive enteral nutrition in adults with Crohn's disease: A feasibility randomised controlled trial. Nutrients, 16, 2105. doi: 10.3390/nu16132105

TASMAN Collaborative, including Wright, D., Jeffery, F., Al-Busaidi, I. S., Divinagracia, J., Liu, Y., Glyn, T., Divekar, T., Gernhoefer, E., Chou, J., Lin, A., Richter, K., & Soliman, N. B. (2024). Patterns of opioid use after surgical discharge: A multicentre, prospective cohort study in 25 countries. Anaesthesia, 79(9), 924-936. doi: 10.1111/anae.16297

Brown, K. G. M., Solomon, M. J., Koh, C. E., Sutton, P. A., Aguiar, S., Jr, Bezerra, T. S., … Frizelle, F., … Glyn, T., … Steffens, D. (2024). Defining benchmarks for pelvic exenteration surgery: A multicentre analysis of patients with locally advanced and recurrent rectal cancer. Annals of Surgery. Advance online publication. doi: 10.1097/sla.0000000000006348

Waddell, O., Teo, Y., Thompson, N., McCombie, A., Glyn, T., & Frizelle, F. (2024). Do treatment patterns differ in those with early-onset colorectal cancer? Expert Review of Anticancer Therapy, 24(5), 313-323. doi: 10.1080/14737140.2024.2341731

Waddell, O., Pearson, J., McCombie, A., Marshall, H., Purcell, R., Keenan, J., Glyn, T., & Frizelle, F. (2024). The incidence of early onset colorectal cancer in Aotearoa New Zealand: 2000–2020. BMC Cancer, 24, 456. doi: 10.1186/s12885-024-12122-y

Glyn, T., Williams, S., Whitehead, M., Eglinton, T., West, N., & Purcell, R. V. (2024). Digital spatial profiling identifies molecular changes involved in development of colitis-associated colorectal cancer. Frontiers in Oncology, 14, 1247106. doi: 10.3389/fonc.2024.1247106

TASMAN Collaborative, including Wright, D., Al-Busaidi, I. S., Divinagracia, J., Glyn, T., Choi, H., Divekar, T., Chou, J., Lin, A., Richter, K., & Soliman, N. B. (2024). Impact of opioid-free analgesia on pain severity and patient satisfaction after discharge from surgery: Multispecialty, prospective cohort study in 25 countries. British Journal of Surgery, 111(1), znad421. doi: 10.1093/bjs/znad421

Pal, A., Chittleborough, T., McCombie, A., Glyn, T., & Frizelle, F. A. (2024). Human factors in pelvic exenteration: Themes in high-performing teams. Colorectal Disease, 26, 95-101. doi: 10.1111/codi.16825

Jain, A., Gormly, K. L., Glyn, T., Sammour, T., Koay, E. J., Oar, A., … Vatandoust, S. (2024). Management of rectal cancer in the era of total neoadjuvant therapy and watch and wait: A multidisciplinary team discussion at the Australasian Gastro-Intestinal Trials Group (AGITG) Annual Scientific Meeting 2022. Asia-Pacific Journal of Clinical Oncology, 20(1), 71-80. doi: 10.1111/ajco.13974

Journal - Research Other

Thompson, N., Morley-Bunker, A., McLauchlan, J., Glyn, T., & Eglinton, T. (2024). Use of artificial intelligence for the prediction of lymph node metastases in early-stage colorectal cancer: Systematic review. BJS Open, 8(2), zrae033. doi: 10.1093/bjsopen/zrae033

Conference Contribution - Published proceedings: Abstract

Joshi, S., on behalf of Songdo Consensus, Hanna, L., Cho, D.-H., Garg, P., Glyn, T., … Tozer, P. (2024). The Songdo Consensus: Minimum reporting standards for studies of intervention in idiopathic anal fistula. Colorectal Disease, 26(Suppl. 2), (pp. 262-263). doi: 10.1111/codi.17125

Waddell, O., Pearson, J., McCombie, A., Marshall, H., Glyn, T., Purcell, R., Keenan, J., & Frizelle, F. (2024). The rising incidence of early onset colorectal cancer in Aotearoa New Zealand: Changing trends from 2000 to 2020. ANZ Journal of Surgery, 94(Suppl. 1), GS003. doi: 10.1111/ans.18951

Teo, Y., Waddell, O., McCombie, A., Glyn, T., & Frizelle, F. (2024). Early onset colorectal cancer: Retrospective review of treatment patterns at Christchurch. ANZ Journal of Surgery, 94(Suppl. 1), CR044P. doi: 10.1111/ans.18951

Paterson, C., Nikolic, A., Hill, A., Singh, P., Glyn, T., & Eglinton, T. (2024). Do perioperative probiotics/synbiotics reduce postoperative infection rates following elective colorectal surgery? A systematic review and meta-analysis. ANZ Journal of Surgery, 94(Suppl. 1), CR013. doi: 10.1111/ans.18951

Awarded Doctoral Degree

Glyn, T. (2024). Inflammatory bowel disease associated colorectal cancer (PhD). University of Otago, Dunedin, New Zealand. Retrieved from https://hdl.handle.net/10523/44034

2023

Chapter in Book - Research

Glyn, T., Wood, V., & Frizelle, F. (2023). Multivisceral and management of recurrent colorectal cancer. In S. R. Steele (Ed.), Steele's colon and rectal surgery. (pp. 460-470). Wolters Kluwer.

Journal - Research Article

To, Y. H., Gibbs, P., Tie, J., Loree, J., Glyn, T., & Degeling, K. (2023). Circulating tumour DNA guided adjuvant chemotherapy decision making in stage II colon cancer: A clinical vignette study. Cancers, 15, 5227. doi: 10.3390/cancers15215227

Thompson, N., Gatenby, G., Waddell, O., Purcell, R., Keenan, J., Pearson, J. F., Frizelle, F., & Glyn, T. (2023). Early onset colorectal cancer in Canterbury, New Zealand. ANZ Journal of Surgery, 93, 2148-2154. doi: 10.1111/ans.18357

Lee, M. S., Thomas, A., Pearson, J. F., Purcell, R., Frizelle, F., & Glyn, T. (2023). Risk of colorectal cancer in patients with appendicitis over the age of 40 years. Colorectal Disease, 25, 624-630. doi: 10.1111/codi.16429

Journal - Research Other

Waddell, O., Glyn, T., & Frizelle, F. (2023). Is it time to reduce the age of screening for colorectal cancer? New Zealand Medical Journal/Te ara tika o te hauora hapori, 136(1580), 8-11. Retrieved from https://journal.nzma.org.nz/

Glyn, T., Oar, A., Vatandoust, S., Heriot, A., & Jain, A. (2023). Rectal cancer treatment: An embarrassment of riches? ANZ Journal of Surgery, 93, 2293-2294. doi: 10.1111/ans.18634

Waddell, O., McLauchlan, J., McCombie, A., Glyn, T., & Frizelle, F. (2023). Quality of life in early-onset colorectal cancer patients: Systematic review. BJS Open, 7(3), zrad030. doi: 10.1093/bjsopen/zrad030

Glyn, T., & Lightner, A. L. (2023). Inflammatory bowel disease and colorectal cancer. Digestive Disease Interventions, 7(1), 51-57. doi: 10.1055/s-0042-1760425

Conference Contribution - Published proceedings: Abstract

Lee, M. S., Pearson, J., Purcell, R., Frizelle, F., & Glyn, T. (2023). Risk of colorectal cancer in patients with appendicitis over the age of 40 years. ANZ Journal of Surgery, 93(Suppl. 1), (pp. 43). doi: 10.1111/ans.18394

Wall, C., Glyn, T., Rowbotham, D., Haines, M., Bissett, I., Eglinton, T., & Gearry, R. (2023). Randomised feasibility study of preoperative medical nutrition therapy in adults undergoing surgery for Crohn's disease. Journal of Crohn's & Colitis, 17(Suppl. 1), (pp. i899). doi: 10.1093/ecco-jcc/jjac190.0899

Conference Contribution - Verbal presentation and other Conference outputs

Pearson, J., Waddell, O., McCombie, A., Marshall, H., Purcell, R., Keenan, J., Glyn, T., & Frizelle, F. (2023, November-December). The incidence of early-onset colorectal cancer in Aotearoa: 2000-2020. Verbal presentation at the International Biometric Society Australasian Region (IBS-AR) and the Statistical Ecology and Environmental Monitoring (SEEM) Joint Conference, Waitangi, New Zealand.

2022

Chapter in Book - Research

Glyn, T., & Frizelle, F. (2022). Small bowel mesenchymal tumours. In J. A. Windsor, S. Pandanaboyana & A. A. Agarwal (Eds.), Duodenum and small bowel. Oxford, UK: Oxford University Press.

Journal - Research Article

The POSTVenTT Study Collaborative, including Wright, D., Brown, A. W., Allen-Brough, C., Kieser, D. C., Roake, J., Lyons, O., Lim, E. T., Glyn, T., Roberts, E., Siggins, L., Gandhi, K., Huang, J., Hart, A., & Amer, M. (2022). The management of peri-operative anaemia in patients undergoing major abdominal surgery in Australia and New Zealand: A prospective cohort study. Medical Journal of Australia, 217(9), 487-493. doi: 10.5694/mja2.51725

COVIDSurg Collaborative, and GlobalSurg Collaborative, including, Wright, D., Benson, R., Kieser, D., Clifford, Z., Frizelle, F., Glyn, T., Lim, E., Lyons, O., O'Grady, M., Roake, J., Ailabouni, R., Alqassab, M., Amer, M., Egbuji, J., Haddow, J., Hawkins, R., Oliver, T., Saw, K. S., & Lahood, Z. (2022). SARS-CoV-2 infection and venous thromboembolism after surgery: An international prospective cohort study. Anaesthesia, 77(1), 28-39. doi: 10.1111/anae.15563

Kim, E., Fernando, C., McCombie, A., Bailey, W., Frizelle, F., Glyn, T., Porter, C., Wakeman, C., & Creagh, T. (2022). Abdominal and perineal hernia rates following vertical rectus abdominis myocutaneous (VRAM) flap reconstruction : A supraregional experience. Journal of Plastic, Reconstructive & Aesthetic Surgery, 75, 1158-1163. doi: 10.1016/j.bjps.2021.11.002

Journal - Research Other

Shine, R. J., Glyn, T., & Frizelle, F. (2022). Pelvic exenteration: A review of current issues/controversies. ANZ Journal of Surgery, 92, 2822-2828. doi: 10.1111/ans.17734

Glyn, T., & Purcell, R. (2022). Circulating bacterial DNA: A new paradigm for cancer diagnostics [Mini review]. Frontiers in Medicine, 9, 831096. doi: 10.3389/fmed.2022.831096

Conference Contribution - Published proceedings: Abstract

Wall, C., Glyn, T., Bissett, I., Rowbotham, D., Haines, M., Gearry, R., & Eglinton, T. (2022). Perioperative nutrition optimisation in nourished Crohn's disease patients: A feasibility randomised controlled trial. Colorectal Disease, 24(Suppl. 1), (pp. 144). doi: 10.1111/codi.16048

Kim, E., Fernando, C., McCombie, A., Bailey, W., Frizelle, F., Glyn, T., Wakeman, C., & Creagh, T. (2022). Abdominal and perineal hernia rates following vertical rectus abdominus myocutaneous (VRAM) flap reconstruction: A supraregional experience. Colorectal Disease, 24(Suppl. 1), (pp. 19). doi: 10.1111/codi.16048

Thompson, N., Gatenby, G., Waddell, O., Keenan, J., Frizelle, F., & Glyn, T. (2022). Characteristics of early-onset colorectal cancer in the Canterbury population. ANZ Journal of Surgery, 92(Suppl. 1), (pp. 34). doi: 10.1111/ans.17609

Conference Contribution - Verbal presentation and other Conference outputs

Glyn, T. (2022, February). Dysplasia in UC: Optimal diagnostic approach and monitoring. Verbal presentation at the Tripartite Colorectal Meeting, Auckland, New Zealand.

Glyn, T. (2022, June-July). Case discussion: Bony exenterations. Verbal presentation at the PelvEx Collaborative Annual Meeting, Amsterdam, The Netherlands.

Glyn, T. (2022, November). Christchurch approach to locally advanced rectal cancer. Keynote presentation at the Australasian Gastro-Intestinal Cancer Trials Group (AGITG) 24th Annual Scientific Meeting, Melbourne, Australia.

Koay, E., Smyth, L., Glyn, T., Jameson, M., Oar, A., & Sammour, T. (2022, November). Locally advanced rectal cancer [Multidisciplinary workshop]. Panel discussion at the Australasian Gastro-Intestinal Cancer Trials Group (AGITG) 24th Annual Scientific Meeting, Melbourne, Australia.

2021

Journal - Research Article

COVIDSurg Collaborative, and GlobalSurg Collaborative, including, Wright, D., Benson, R., Kieser, D., Rennie, S., Clifford, Z., Frizelle, F., Glyn, T., Lim, E., Lyons, O., O'Grady, M., Roake, J., Ailabouni, R., Alqassab, M., Amer, M., Haddow, J., Hawkins, R., Oliver, T., Saw, K. S., Gaston, M., & Haimona, M. (2021). Effects of pre-operative isolation on postoperative pulmonary complications after elective surgery: An international prospective cohort study. Anaesthesia, 76, 1454-1464. doi: 10.1111/anae.15560

Gatenby, G., Glyn, T., Pearson, J., Gearry, R., & Eglinton, T. (2021). The long-term incidence of dysplasia and colorectal cancer in a Crohn’s colitis population-based cohort. Colorectal Disease, 23, 2399-2406. doi: 10.1111/codi.15756

COVIDSurg Collaborative, and GlobalSurg Collaborative, including, Wright, D., Benson, R., Kieser, D., Rennie, S., Clifford, Z., Frizelle, F., Glyn, T., Lyons, O., O'Grady, M., Roake, J., Ailabouni, R., Alqassab, M., Amer, M., Haddow, J., Hawkins, R., Oliver, T., Saw, K. S., Gaston, M., & Haimona, M. (2021). Timing of surgery following SARS-CoV-2 infection: An international prospective cohort study. Anaesthesia, 76, 748-758. doi: 10.1111/anae.15458

COVIDSurg Collaborative, and GlobalSurg Collaborative, including, Wright, D., Benson, R., Kieser, D., Rennie, S., Clifford, Z., Frizelle, F., Glyn, T., Lim, E., Lyons, O., O'Grady, M., Roake, J., Ailabouni, R., Alqassab, M., Amer, M., Haddow, J., Hawkins, R., Oliver, T., Saw, K. S., Gaston, M., & Haimona, M. (2021). SARS-CoV-2 vaccination modelling for safe surgery to save lives: Data from an international prospective cohort study. British Journal of Surgery, 108, 1056-1063. doi: 10.1093/bjs/znab101

Journal - Research Other

REACCT Collaborative, including Frizelle, F., & Glyn, T. (2021). Characteristics of early-onset vs late-onset colorectal cancer: A review. JAMA Surgery, 156(9), 865-874. doi: 10.1001/jamasurg.2021.2380

Glyn, T., Sagar, P., & Frizelle, F. (2021). Re: Malignant transformation of tailgut cysts is significantly higher than previously reported: Systematic review of cases in the literature. Colorectal Disease, 23(11), 3027. doi: 10.1111/codi.15908

2020

Journal - Research Article

Hawkins, A. T., Wise, P. E., Chan, T., Lee, J. T., Glyn Mullaney, T., Wood, V., Eglinton, T., Frizelle, F., … Lightner, A. L. (2020). Diverticulitis: An update from the age old paradigm. Current Problems in Surgery, 57, 100862. doi: 10.1016/j.cpsurg.2020.100862

Glyn Mullaney, T., & Frizelle, F. (2020). Quality of life outcomes in patients undergoing surgery for locally recurrent rectal cancer. Seminars in Colon & Rectal Surgery, 31, 100767. doi: 10.1016/j.scrs.2020.100767

Glyn Mullaney, T., McCombie, A., Wakeman, C., Eglinton, T., & Gearry, R. (2020). Surveillance for dysplasia in patients with inflammatory bowel disease: An updated national survey of colonoscopic practice in New Zealand. New Zealand Medical Journal, 133(1517), 56-65. Retrieved from https://www.nzma.org.nz/journal

Tranter-Entwistle, I., Mullaney, T. G., Noah, K., Pearson, J., Falvey, J., Gearry, R., & Eglinton, T. (2020). Long-term incidence of dysplasia and colorectal cancer in an ulcerative colitis population-based cohort. ANZ Journal of Surgery, 90, 821-825. doi: 10.1111/ans.15686

Journal - Research Other

Espiner, E., Hart, S., Poole, G., Glyn Mullaney, T., & Hoh, S. M. (2020). Beyond COVID-19: Five actions which would improve the health of all New Zealanders. New Zealand Medical Journal, 133(1515), 125-127. Retrieved from https://www.nzma.org.nz/journal

Other Research Output

Glyn, T. (2020, November). IBD associate neoplasia. UOC Research Seminar Series, University of Otago, Christchurch, New Zealand. [Research Presentation].

2019

Journal - Research Article

Mullaney, T. G., Lam, D., Kluger, R., & D’Souza, B. (2019). Randomized controlled trial of probiotic use for post‐colonoscopy symptoms. ANZ Journal of Surgery, 89, 234-238. doi: 10.1111/ans.14883

Journal - Research Other

Mullaney, T., & Eglinton, T. (2019). The cost of colorectal complications in New Zealand. New Zealand Medical Journal, 132(1497), 6-8. Retrieved from https://www.nzma.org.nz/journal

Mullaney, T. G., & D’Souza, B. (2019). Mesenteric cyst: An uncommon cause of acute abdomen. ANZ Journal of Surgery, 89(3), E98-E99. doi: 10.1111/ans.14067

Mullaney, T., & Frizelle, F. (2019). Where are we going with cancer treatment in New Zealand? New Zealand Medical Journal, 132(1491), 7-10. Retrieved from https://www.nzma.org.nz/journal

Journal - Professional & Other Non-Research Articles

Kubovy, J., & Mullaney, T. G. (2019). Gastrointestinal: A case of a monster enterolith in a Crohn's disease patient. Journal of Gastroenterology & Hepatology, 39, 1672. doi: 10.1111/jgh.14687

2018

Journal - Research Article

Mullaney, T. G., Lightner, A. L., Johnston, M., Kelley, S. R., Larson, D. W., & Dozois, E. J. (2018). A systematic review of minimally invasive surgery for retrorectal tumors. Techniques in Coloproctology, 22(4), 255-263. doi: 10.1007/s10151-018-1781-6

Duchalais, E., Glyn Mullaney, T., Spears, G. M., Kelley, S. R., Mathis, K., Harmsen, W. S., & Larson, D. W. (2018). Prognostic value of pathological node status after neoadjuvant radiotherapy for rectal cancer. British Journal of Surgery, 105(11), 1501-1509. doi: 10.1002/bjs.10867

Segal, J. P., Penez, L., Elkady, S. M., Worley, G. H. T., McLaughlin, S. D., Mullish, B. H., … Glyn, T., … Hart, A. L. (2018). Long term outcomes of initial infliximab therapy for inflammatory pouch pathology: A multi-Centre retrospective study. Scandinavian Journal of Gastroenterology, 53(9), 1051-1058. doi: 10.1080/00365521.2018.1496271

Journal - Research Other

Mullaney, T. G., Lightner, A. L., Johnston, M., Keck, J., & Wattchow, D. A. (2018). ‘Watch and wait’ after chemoradiotherapy for rectal cancer. ANZ Journal of Surgery, 88(9), 836-841. doi: 10.1111/ans.14352

Burke, J. R., Armstrong, G., Mullaney, T., & Jayne, D. (2018). Intra‐operative fluorescence angiography facilitates tailored resection in ischaemic colitis: A video vignette. Colorectal Disease, 20(11), 1050. doi: 10.1111/codi.14403

2012

Conference Contribution - Published proceedings: Full paper

Poole, G. H., Glyn, T., Srinivasa, S., & Hill, A. G. (2012). Modular acute system for general surgery: Hand over the operation, not the patient. ANZ Journal of Surgery, 82(3), (pp. 156-160). doi: 10.1111/j.1445-2197.2011.05963.x

2011

Conference Contribution - Published proceedings: Abstract

Poole, G., Glyn, T., & Hill, A. (2011). Modular processing of acute general surgical admissions in a high-volume unit over 8 years: The 12 point GSA plan is being followed. ANZ Journal of Surgery, 81(Suppl. 1), (pp. A37). doi: 10.1111/j.1445-2197.2011.05733.x