Table 3.

Technical details of the included studies.

Reference, first author	Histological specimen	Examined intestine	Ex vivo/pre-operatively	Control group/comparison with healthy tissue	USE assessment	Histologic assessment
Stidham RW17	Surgical resection	Small bowel	Trans-abdominal, pre-operatively	Yes	Semi-quantitative	Semi-quantitative
Havre RF18	Surgical resection	Small- and large-bowel	Ex vivo	Yes	Semi-quantitative	Semi-quantitative
Dillman JR19	Surgical resection	Small- and large-bowel	Ex vivo	No	Quantitative	Semi-quantitative
Baumgart DC20	Surgical resection	Small- and large-bowel	Pre-operatively and ex vivo	Yes	Semi-quantitative	Semi-quantitative
Fraquelli M21	Surgical resection	Small- and large-bowel	Trans-abdominal, pre-operatively	Yes	Semi-quantitative and quantitative	Semi-quantitative
Giannetti A27	Surgical resection	Small bowel	Trans-abdominal, pre-operatively	No	Qualitative	Qualitative
Lu C22	Surgical resection	Small- and large-bowel	Trans-abdominal, pre-operatively	No	Quantitative	Semi-quantitative
Serra C23	Surgical resection	Small- and large-bowel	Trans-abdominal, pre-operatively	No	Quantitative	Semi-quantitative
Chen YJ24	Surgical resection	Small- and large-bowel	Trans-abdominal, pre-operatively	Yes	Quantitative	Semi-quantitative
Quaia E25	Endoscopic biopsies or surgical resection	Small bowel	Trans-abdominal, pre-operatively	No	Semi-quantitative	Semi-quantitative
Ding SS26	Endoscopic biopsies or surgical resection	Small- and large-bowel	Trans-abdominal, pre-operatively	No	Semi-quantitative and quantitative	Semi-quantitative
Thimm MA28	Surgical resection	Small bowel	Trans-abdominal, pre-operatively	No	Quantitative	Qualitative

USE, ultrasound elastography.