Sonography in Budd-Chiari syndrome.

Objective: The objective of this presentation is to provide an overview of sonographic manifestations of Budd-Chiari syndrome (BCS).

Methods: Patients were scanned with ultrasound systems using mainly a 2- to 5-MHz curvilinear transducer and in some patients a 5- to 12-MHz linear transducer. The patients were asked to fast from the previous night or for at least 6 hours.

Sonographic diagnosis of placental teratoma.

Placental teratomas are very rare, and the features that distinguish them on sonography and allow their differentiation from other placental tumors have not been fully described. Prenatal recognition of this tumor is prognostically useful because, unlike other neoplasms, placental teratoma is benign and almost never associated with congenital deformities in the fetus. We describe the case of a 27-year-old pregnant woman in whom prenatal color Doppler sonographic examination performed during early-stage labor revealed a heterogeneous mass at the placental margin.

Antenatal detection of idiopathic arterial calcification with hydrops fetalis.

Idiopathic arterial calcification of infancy, or occlusive infantile arterial calcification, is a rare cause of arterial calcification. This condition is inherited as an autosomal recessive pattern, which is almost always fatal. In most of the 100 cases described in the literature, the diagnosis was made at autopsy; a few cases have been reported in which an antemortem diagnosis was made on the basis of radiographic or sonographic demonstration of arterial calcification.

Aneurysms of the inferior vena cava.

Two cases of saccular aneurysms of the infrarenal inferior vena cava (IVC) associated with retrohepatic IVC obstruction are described. Ultrasonographic, computerized tomographic and inferior venacavography findings in these cases are presented.

Transvaginal sonographic diagnosis of live monochorionic twin ectopic pregnancy.

Ectopic pregnancy is a leading cause of pregnancy-related deaths; its incidence has progressively increased in recent years. Spontaneous twin ectopic pregnancy, however, is extremely rare. Among more than 100 reported cases of twin tubal pregnancies, only 5 cases in which fetal cardiac motion has been visualized in both embryos have been reported.