High-resolution transabdominal ultrasound done by experienced examiners has an excellent diagnostic accuracy in the diagnosis of complications in patients with Crohn's disease. Thus, it can be recommended as one of the primary investigative procedures for evaluation of Crohn's disease.

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Transabdominal B-mode sonography in combination with colour Doppler, pulsed wave Doppler and contrast-enhanced ultrasound is a very important tool to detect hepatic vascular malformations. It is an excellent procedure for the screening of patients with an iron deficiency anaemia. For the first time, we have demonstrated CEUS as an additional approach in the diagnosis of liver involvement in patients with Osler's disease.

This case report demonstrates that percutaneous ultrasonography should be used as the first imaging procedure in the diagnosis of acute abdominal pain. This procedure makes it possible to detect a gallstone ileus. It is important also to define various intestinal structures accurately.