Primary retroperitoneal teratoma in the adult: correlation of MRI features with CT and pathology.

Primary benign teratoma of the retroperitoneum is a rare tumor in the adult population. Only one case with an MRI examination has been reported in the English literature. This paper describes the CT and MRI features of a retroperitoneal teratoma in a 24-year-old male and discusses the value of MRI in the diagnosis and the preoperative imaging of such a tumor.

[MRI of the normal portal system: the artefacts. Apropos of 45 cases].

The protal system of 45 normal patients have been retrospectively studied on spin echo MRI sequences (interleaved cuts): multiple artifacts have been evaluated and 24% of them were visualized at the portal system level. Thus, partial volume effect responsible for almost 25% of the artifacts is not always easily seen on a single sequence. Respiratory and aortic artifacts can deteriorate the visualization of the vascular lumen but cannot be confused with a thrombosis.

[Rectosigmoid hemangioma. Specific aspects in x-ray computed tomography. Apropos of a case].

This observation illustrates the use of CT in the diagnosis of rectosigmoid hemangiomas and the assessment of their extension. The CT appearance of hemangiomas is very specific and therefore allows confirming a diagnosis that is often difficult to make with other radiological techniques and with endoscopy: phleboliths within the thickened rectal wall are a characteristic sign. CT is primarily required when radical surgery is contemplated due to disabling repeated proctorrhagia: it provides a better delineation of trans- and extraparietal hemangioma extension, knowing that adhesion (.

MR imaging of adult Wilms' tumor: correlation with US, CT, and pathology.

The magnetic resonance (MR) features of an adult nephroblastoma are presented. The MR appearance is correlated with ultrasound (US), computed tomographic (CT) and pathology. The tumor appeared heterogeneous with calcifications and areas of necrosis and hemorrhage.

[The value of pulsed Doppler for the follow-up of the transplanted kidney in the first 3 months of transplantation].

This prospective study was conducted in 34 consecutive renal transplant patients. Pulsed doppler was used to evaluate the peripheral resistance (PR) in the transplant vessels. Under normal conditions, the PR of the graft is low, resulting in a continuous diastolic blood flow.