Table 3.

Comparison of neuroendocrine tumour grade for tissue samples and resection specimens by tissue sampling method and location

Sample subgroup	n	Tissue sample grading relative to resection specimen
		Underestimated	Same	Overestimated
Method
Core biopsy	29	8 (27.6%)	17 (58.6%)	4 (13.8%)
Fine needle aspiration	7	2 (28.6%)	5 (71.4%)	0 (0%)
Total	36	10 (27.8%)	22 (61.1%)	4 (11.1%)
Site
Primary tumour	31	9 (29.0%)	18 (58.1%)	4 (12.9%)
Metastasis	5	1 (20.0%)	4 (80.0%)	0 (0%)
Total	36	10 (27.8%)	22 (61.1%)	4 (11.1%)