Abstract
Ileal neuroendocrine tumours are one of the most common gastro-enteropancreatic neuroendocrine tumours (GEP-NETs), making up to 28% of all GEP-NETs. Small bowel NETs are the most common type of small bowel tumour; 45% of these lesions occur in the distal ileum. Small bowel neuroendocrine tumours commonly present in the sixth to seventh decade; however, they can occur at any time of life. In up to 30% of cases, these lesions are multiple, with some case series reporting this to be as high as 40%. When diagnosed, ileal NETs are frequently larger than 2 cm and have spread to regional lymph nodes.
In this article, we will review the different staging methods of GEP-NETs and incorporate the tumour, node and metastases (TNM) staging systems developed by the European Neuroendocrine Tumour Society (ENETS) and American Joint committee on Cancer (AJCC). The importance of radiology in staging will be discussed extensively, including the difficulties with each resource and the challenges in accurately staging and locating the primary site of disease. We will look at the role of histology in the grading of tumours, with focus on the mitotic and proliferation indices.
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Akbar, T., Srirajaskanthan, R., Ramage, J.K. (2018). Tumour Staging: Ileum. In: Colao, A., Faggiano, A., de Herder, W. (eds) Neuroendocrine Tumors in Real Life. Springer, Cham. https://doi.org/10.1007/978-3-319-59024-0_14
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