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Biomedical subjects

D Bielen

Publications and source records attributed to D Bielen.

9 recordsLinked to original sources
PubMed2006

Ovarian torsion in a premenarcheal girl: MRI findings.

Adnexal torsion is an uncommon cause of severe lower abdominal pain in women and is often difficult to distinguish from other acute abdominal conditions. However, adnexal torsion should be considered in premenarcheal girls admitted with acute abdominal pain and evidence of an ovarian mass. Accurate and early radiological diagnosis is mandatory immediately after onset of clinical symptoms in order to preserve the viability of the ovary. Ultrasound (US) is usually the first line examination performed in an emergency setting, but computed tomography (CT) and magnetic resonance imaging (MRI) can be useful in case of ambiguous US findings, especially in patients with sub-acute symptoms and a suspected adnexal mass. This case report describes the additional value of MRI in a premenarcheal girl with sub-acute right fossa pain.

Abdomen, Acute↗
PubMed2006

Value of carbon dioxide wedged venography and transvenous liver biopsy in the definitive diagnosis of Abernethy malformation.

We report a 25-year-old man who presented with congenital absence of the portal vein, or Abernethy malformation, a rare congenital disorder in which the mesenteric and splenic venous drainages bypass the liver and directly drain into the inferior vena cava through an extrahepatic portosystemic shunt. Magnetic resonance imaging, which showed multiple nodular lesions in both liver lobes that were associated with an absence of intrahepatic portal venous branches, strongly suggested the diagnosis of the Abernethy malformation. Carbon dioxide wedged venography and transvenous liver biopsy, which were performed in the same session by a right jugular approach, confirmed these findings. This technique can be considered a valuable alternative diagnostic tool to catheter arteriography and percutaneous transhepatic liver biopsy.

Adult↗
PubMed2002

Patient acceptance for CT colonography: what is the real issue?

The aim of this study was to evaluate the discomfort associated with CT colonography compared with colonoscopy and bowel purgation cleansing, and to evaluate patient preference between CT colonography and colonoscopy. In a total of 124 patients, scheduled for multidetector virtual CT colonography and diagnostic colonoscopy, patient acceptance and future preference were assessed during the different steps of the procedure (colon preparation, CT examination, and conventional colonoscopy). Patients who described contradictory findings between the degree of discomfort and their preference regarding follow-up examinations were retrospectively reinterviewed regarding the reason for this discrepancy. Colonoscopy was graded slightly more uncomfortable than virtual CT colonography, but the preparation was clearly the most uncomfortable part of the procedure. Concerning their preference regarding follow-up examinations, 71% of the patients preferred virtual CT colonography, 24% preferred colonoscopy, and 5% had no preference. Twenty-eight percent of the patients preferred virtual CT colonography despite that they thought it was equally or even more uncomfortable than colonoscopy. This was mainly due to the faster procedure (17 patients), the lower physical challenge (14 patients), and the lack of sedation (12 patients) of virtual CT colonography. Factors other than the discomfort related to the examinations play an important role in the patient's preference for virtual CT colonography, namely the faster procedure, the lower physical challenge, and the lack of sedation. Since the preparation plays a major decisive factor in the patient acceptance of virtual CT colonography, more attention should be given to fecal tagging.

Adult↗
PubMed2001

Virtual colonoscopy: a new screening tool for colorectal cancer?

One of the new forays into the field of medical imaging is the 3-D computer imaging. Thanks to new and more performant computer processing and 3-D rendering methods it is nowadays possible to generate high resolution images of the inner surface of the colon based on CT and MR images. This article reviews the current status and research directions of virtual colonoscopy and its possible eligibility of becoming a new tool for colorectal screening.

Colonography, Computed Tomographic↗
PubMedDate not supplied

Delivery related rupture of the gravid uterus: imaging findings.

Rupture of the gravid uterus is a rare, life-threatening obstetric complication. Major symptoms are hypovolemic shock and abdominal pain during late pregnancy or after vaginal delivery. Immediate surgical therapy is required. We report a case of uterine rupture after vaginal delivery diagnosed by means of ultrasonography and computed tomography.

Abdominal Pain↗
PubMedDate not supplied

Small bowel obstruction secondary to disseminated candidiasis in an immunocompromised patient: radiologic-pathologic correlation.

Immunosuppression for therapeutic reasons (e.g. post transplantation, post chemotherapy), as well as pathologic immunodeficiency due to certain pathologic conditions (e.g. AIDS, leukemia), is increasingly encountered in daily medical practice. As a result, the concomitant risk for opportunistic infections is higher and immunocompromised patients may present with uncommon clinical and radiologic conditions. We report on a case of a 33-year-old immunocompromised woman with a history of recurrent T-cell lymphoblastic lymphoma, which presented with abdominal pain. Computed tomography (CT) images demonstrated significant small bowel dilatation, wall thickening, and high-density intestinal content, with a focal point of transition in the pelvis. Extensive fungal enteritis due to Candida Albicans with partial small bowel obstruction was found on autopsy.

Adult↗
PubMedDate not supplied

Left ovarian Brenner tumor.

Ovarian Brenner tumors are uncommon neoplasms of the ovary, representing approximately 2% of all ovarian neoplasms. Nowadays there is general agreement that Brenner tumors are derived from the surface epithelium of the ovary or the pelvic mesothelium through transitional cell metaplasia. Association with other surface-derived neoplasms, either in the ipsilateral or contralateral ovary, is reported in 30% of the cases. We report a case of benign ovarian Brenner tumor and discuss the typical features on magnetic resonance imaging (MRI) and computed tomography (CT) scan as well as the differential diagnosis.

Aged↗