Active research interests include faecal incontinence, the female pelvic floor, and laparoscopic colorectal surgery. Current research activity includes a prospective study on the pelvic floor after childbirth, laparoscopic colorectal resection for carcinoma and quality of life analysis after resection for colon or rectal cancer, as well as active involvement in the  formation of databases for colon and rectal cancer and anal fistula to allow surgeons to benchmark and assess their performance. It is planned for this prospective database to be utilised across the state.  

PUBLICATIONS 

Kichenadasse G, Zakaria J, Rodda DJ, Hewett, PJ, Rieger NA, Stephens JH, Pittman K, Patterson K, Borg M, Price TJ. Squamous cell carcinoma of the anal canal at The Queen Elizabeth Hospital: A local experience. Asia-Pacific Journal of Clinical Oncology 2007; 3:214-218.

Lee JSJ, Rieger NA, Stephens JH, Hewett, PJ, Rodda DJ, Lawrence MJ. Six-year prospective analysis of the rectal bleeding clinic at The Queen Elizabeth Hospital, Adelaide , South Australia . ANZ Journal of Surgery 2007; 77:553-556.

Rieger NA, Barnett FS, Moore JWE, Ananda, SS, Croxford M, Johns J, Gibbs P. Quality of pathology reporting impacts on lymph node yield in colon cancer. Journal of Clinical Oncology 2007; 25(4):463.

Tan PY, Hewett P, Stephens J, Rieger N. Laparoscopic colectomy: a study of open conversion. ANZ Journal of Surgery 2007; 77(Suppl. 1):A18.

Tan PY, Stephens JH, Rieger NA, Hewett PJ. Laparoscopically assisted colectomy: a study of risk factors and predictors of open conversion. Surgical Endoscopy 2007.

Watt AM, Faragher IG, Griffin TT, Rieger, NA, Maddern GJ. Self-expanding metallic stents (SEMS) for relieving malignant colorectal obstruction: a systematic review. Annals of Surgery 2007; 246(1):24-30.

Jamieson G, Anvari M, Rieger N. Colectomy open and laparoscopic approaches; colonic conduits: the anatomy of the colon. In Jamieson G, ed. The Anatomy of General Surgical Operations , 2nd edition: Churchill Livingstone, 2006. pp. 63-71.

Jamieson G, Rieger N. Surgical procedures of the anus: the anatomy of the anal canal and associated structures. In Jamieson G, ed. The Anatomy of General Surgical Operations , 2nd edition: Churchill Livingstone, 2006. pp. 77-80.

Lloyd JM, McIver CM, Stephenson S-A, Hewett, PJ, Rieger N, Hardingham JE. Identification of early-stage colorectal cancer patients at risk of relapse post-resection by immunobead reverse transcription-PCR analysis of peritoneal lavage fluid for malignant cells. Clinical Cancer Research 2006; 12(2): 417-423.