“…The ultrasound conventional greyscale image allows the visualisation of the five layers of the bowel: the border between the lumen and mucous membrane – hyperechogenic, the mucous membrane – hypoechogenic, the submucous membrane – hyperechogenic, the muscle layer (or the muscle membrane proper) – hypoechogenic, the serous membrane – hyperechogenic [ 7 , 8 , 10 , 12 ]. The main ultrasound criteria used in the evaluation of the bowel inflammation is the thickness of the intestinal wall, which according to different studies should be in normal condition up to 3–4 mm in the small intestine and up to 4–5 mm in the colon [ 2 , 4 , 7 , 8 , 12 ]. The thickening of the intestinal wall is present in many pathological conditions, such as: Crohn’s disease, ulcerative colitis, intestinal ischaemia, neoplastic lesions, or amyloidosis [ 7 , 8 ].…”