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Osler-Rendu-Weber disease, or hereditary hemorrhagic telangiectasia, is a vascular disease with autosomal dominant transmission. The liver is involved in 31% of patients with hereditary hemorrhagic telangiectasia (1). It appears that the lesions uncommonly causes serious disease. We report the imaging findings and the therapy in a case with extensive telangiectasis in the liver.

Accurate differentiation of retro- or intraperitoneal localization of a primary abdominal tumor by US and CT is often difficult. In our case an abdominal mass was incidentally discovered and identified as a typical benign schwannoma, but with a very atypical location in the mesentery. We found that MRI was a valuable adjunct to CT for exact tumor localization.

A 40-year-old woman presented with acute left upper quadrant pain due to torsion of an accessory spleen around its long vascular pedicle, causing infarction. Torsion of an accessory spleen is extremely rare. As far as we known only 14 cases have previously been reported in the literature, and more than half patients were children. MRI can be helpful in the differential diagnosis of infarction by suggesting haemorrhagic necrosis on the T2-weighted images.

Sarcoidosis of the pancreas is a rare entity. We report on the computed tomographic demonstration of multifocal pancreatic involvement in a patient with systemic sarcoidosis.

We report on a patient who presented an abdominal wall abscess two years after percutaneous cholecystectomy. The diagnosis of wall abscess caused by migrating gallstones could be made sonographically, whereas thin-section spiral CT failed to show the cause of the abscess: a non-calcified gallstone.

The authors present the US- and CT-findings in a patient with endometroid cystadenocarcinoma of the right ovary. The importance of detecting a small solid component in an otherwise typical "endometrioma" is stressed. The contribution of MR is discussed.

A case of successful wire coil embolization of a bleeding gastroduodenal pseudoaneurysm secondary to necrotizing pancreatitis with pseudocyst formation is reported. The embolization technique using multiple coils is discussed and compared with other techniques previously described.

The post-delivery evaluation of the obstetric patient presenting with severe abdominal pain can be a challenge to the obstetrician, the internist, and the radiologist. Besides non-pregnancy-related causes of abdominal pain, several pregnancy-related complications should be included in the list of differential diagnoses. Based on pathogenesis, these conditions can be divided in four categories: thromboembolic disease, infectious complications, mechanical complications, and complications of preeclampsia. Most disease processes can be adequately visualized with sonography. CT can be indicated for the evaluation of the extent of ovarian vein thrombosis and for depiction of deep abdominal collections in obese patients or in cases of abundant overlying abdominal gas. MRI can be useful to provide the specific diagnosis of hemorrhagic liver infarction in the clinical setting of a HELLP syndrome.

The advantages of spiral CT mainly reside in the possibility to scan the entire liver volume in a single period of about 20 to 30 seconds, while the patient holds his breath. This high acquisition speed allows to selectively evaluate the entire liver during the arterial and/or portal venous phase. In addition, spiral CT is a true volumetric technique that allows a posteriori calculation of perfectly contiguous or even overlapping slices. These two specifications, high acquisition speed and the absence of data gaps improves the detection of focal liver lesions.

Spiral CT allows rapid acquisition of axial images during a single breath-hold. This results in optimal vascular and parenchymal opacification and eliminates respiratory misregistration. These factors also contribute to high quality multiplanar displays. Double phase spiral CT allows repeated scanning in the vascular (arterial) phase and in the parenchymal phase after contrast injection, resulting in optimal detection of parenchymal as well as vascular lesions. The advantages and applications of spiral scanning for imaging the pancreas are discussed.

Spiral CT angiography (CTA) is a promising technique for the evaluation of vascular lesions. We review some important technical aspects in CTA such as longitudinal resolution, determination of injection scan interval and limitations of three-dimensional rendering techniques. Several current and potential applications are discussed.

Spiral CT angiography has been successfully applied to the detection and grading of renal artery stenoses. In this manuscript the technique, the diagnostic accuracy and the advantages and limitations of this new method are discussed.

Although arthrography of the TMJ is nowadays considered as old-fashioned, the technique remains a valuable alternative in cases where MRI is contraindicated. The authors discuss the technique of inferior joint space arthrography and present a review of typical arthrographic cases of the most common types of TMJ pathology.

A case of large pedunculated gastric leiomyoma with intermittent prolapse into the duodenum, causing a somewhat confusing clinical picture is presented. Ultrasound-, CT- and barium studies clearly showed the origin and extent of the tumor. Sonography was the only imaging method that showed intermittent prolapse of the tumor during examination. Imaging studies did not allow prediction of the benign nature of the tumor.

One of the major disadvantages of sagittal arthrotomography of the temporomandibular joint is its limited capability to detect sideways (medial or lateral) disk displacement. Several arthrographic signs, suggesting sideways disk displacement have been described in recent reports. The most important one is the edge sign. In doubtful cases, arthro-CT can be used for depiction of medial or lateral disk displacement.