Biomedical subjects

Alberto Vieira

Publications and source records attributed to Alberto Vieira.

3 recordsLinked to original sources

PubMed2005

Abdominal tuberculosis: imaging features.

LEARNING OBJECTIVES: Radiological findings of abdominal tuberculosis can mimic those of many different diseases. A high level of suspicion is required, especially in high-risk population. In this article, we will describe barium studies, ultrasound (US) and computed tomography (CT) findings of abdominal tuberculosis (TB), with emphasis in the latest. We will illustrate CT findings that can help in the diagnosis of abdominal tuberculosis and describe imaging features that differentiate it from other inflammatory and neoplastic diseases, particularly lymphoma and Crohn's disease. As tuberculosis can affect any organ in the abdomen, emphasis is placed to ileocecal involvement, lymphadenopathy, peritonitis and solid organ disease (liver, spleen and pancreas). A positive culture or hystologic analysis of biopsy is still required in many patients for definitive diagnosis.

Diagnosis, Differential↗

PubMed2004

[Synovial lipoma arborescens].

Lipoma arborescens is a rare intraarticular lesion of unknown etiology. The disorder usually presents as painless swelling and recurrent joint effusion. It is typically located in the knee (especially the suprapatellar bursa), though it has also been described in other joints. Laboratory test results are normal, as well as aspirated synovial fluid. Synovectomy is curative in most cases. The authors report a review of the literature, highlighting the importance of magnetic resonance imaging in the diagnosis of this pathology. Although it is a rare lesion, synovial lipoma arborescens should be included in the differential diagnosis of patients with a chronic swollen joint or recurrent joint effusions.

Bursa, Synovial↗

PubMed2003

Cervical aortic arch and 22q11 deletion--the role of MRI in diagnosis.

Aortic arch anomalies are relatively common, occurring in 0.5-3% of the population. In recent years, they have been recognized as being among the cardiovascular malformations found in chromosome 22q11 deletion. MRI is now an alternative method of diagnosing aortic arch anomalies since it accurately defines aortic anatomy and its relation with the trachea and esophagus, with some advantages in comparison with echocardiography and conventional angiography. The authors present two cases of cervical aortic arch and VSD associated with DiGeorge syndrome (CATCH22+), diagnosed by conventional angiography and magnetic resonance imaging, respectively.

Adolescent↗