No abstract

Gastrointestinal tract perforations can occur for various causes such as peptic ulcer, inflammatory disease, blunt or penetrating trauma, iatrogenic factors, foreign body or a neoplasm that require an early recognition and, often, a surgical treatment.Ultrasonography could be useful as an initial diagnostic test to determine, in various cases the presence and, sometimes, the cause of the pneumoperitoneum.The main sonographic sign of perforation is free intraperitoneal air, resulting in an increased echogenicity of a peritoneal stripe associated with multiple reflection artifacts and characteristic comet-tail appearance.It is best detected using linear probes in the right upper quadrant between the anterior abdominal wall, in the prehepatic space.Direct sign of perforation may be detectable, particularly if they are associated with other sonographic abnormalities, called indirect signs, like thickened bowel loop and air bubbles in ascitic fluid or in a localized fluid collection, bowel or gallbladder thickened wall associated with decreased bowel motility or ileus.Neverthless, this exam has its own pitfalls. It is strongly operator-dependant; some machines have low-quality images that may not able to detect intraperitoneal free air; furthermore, some patients may be less cooperative to allow for scanning of different regions; sonography is also difficult in obese patients and with those having subcutaneous emphysema. Although CT has more accuracy in the detection of the site of perforation, ultrasound may be particularly useful also in patient groups where radiation burden should be limited notably children and pregnant women.

US-guided aspiration and sclerotherapy with 95% ethanol provides a valid alternative to surgery in treating endometrial cysts.

The almost complete overlap between mammographic and US parameters of fibroadenomas and phyllodes tumours and the absence of pathognomonic features preclude the differential diagnosis between the two histological types. US-guided CNB is a valuable tool in the differential diagnosis between fibroadenoma and phyllodes tumour.

Intestinal intussusception in adults is a rare condition, accounting for about 0.003-0.02% of all hospital admissions. This condition in adults represents only 5% of all cases of intussusceptions and is different from paediatric intussusception, which is usually idiopathic. In contrast, almost 90% of cases in adults are secondary to various pathologies that serve as a lead point, such as polyps, Meckel's diverticulum, colonic diverticulum, or malignant or benign neoplasm. The aim of the present study was to assess the capabilities of multislice computed tomography (MSCT) in the diagnosis and correct characterisation of intussusception, especially in distinguishing between intussusceptions with a lead point and those without. Indeed, although the MSCT findings that help to differentiate between lead point and non-lead point intussusceptions have not been well studied, abdominal MSCT remains the most sensitive radiological tool to confirm bowel intussusceptions. Moreover, differentiating intussusceptions with a lead point condition from those without is crucial for directing the patient towards the most appropriate treatment, avoiding surgery when not necessary.