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Biomedical subjects

Isabel Ramos

Publications and source records attributed to Isabel Ramos.

5 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↗
PubMed2005

Genitourinary tuberculosis.

Although uncommon, genitourinary tuberculosis is the most common site of extrapulmonary tuberculosis infection. Its diagnosis is often difficult. This article provides an overview of the pathologic and radiologic findings of this disease process.

Diagnosis, Differential↗
PubMed2004

CD26/DPPIV and response to hepatitis B vaccination.

The prevention of hepatitis B is important, since it is responsible for significant morbidity and mortality around the world. Unfortunately, hepatitis B vaccine does not always induce protective immunity. The lack of immune response to vaccine (non-responders) can depend on individual characteristics. The objective of this study was to correlate the CD26/DPPIV cellular expression and DPPIV serum activity with HBV vaccine response and its possible role as an indicator of immune competence acquisition. We also determined the cellular expression of CD3, CD19, CD56 and CD25 in peripheral blood T lymphocytes. Blood samples were obtained from 28 healthy human volunteers who were enrolled with a vaccination program. There were "responders" (RM = 13) and "non-responders" (NRM = 15), after vaccination. The lymphocyte populations were identified by flow cytometry. DPPIV serum activity was measured fluorimetrically. CD26 expression in responders (55.9 +/- 7.7%) versus in non-responders (51.9 +/- 7.0%) did not show a significant difference. The DPPIV serum activity in responders compared to in non-responder subgroup (59.9 +/- 8.4/50.3 +/- 10.6U/L) showed, however, a significant difference (P < 0.05). The expression of CD3, CD19 and CD56 on peripheral lymphocytes was similar between responders and non-responders. The expression of CD3CD26 (52.2 +/- 8.6%) and CD3CD25 (10.9 +/- 3.8%) in responders versus the expression of CD3CD26 (48.0 +/- 5.7%) and CD3CD25 (8 +/- 4.6%) in non-responders did not show statistically significant difference. CD25 referred as a marker of T lymphocyte activation was increased in responders (15.8 +/- 4.5%) versus in non-responders (10.1 +/- 4.8%), showing a significant difference (P = 0.003). It was, however, impossible to demonstrate an increase in CD3CD25 and CD3CD26 in the responder subgroup. This suggests that different lymphocyte subsets other than T cells are implicated in the response to hepatitis B vaccination.

Journal Article↗
PubMedDate not supplied

[Cardiovascular Nuclear Magnetic Ressonance: present indications and future perspectives].

Nuclear Magnetic Ressonance applied to the cardiovascular area has nowadays a wide range of utilization, in the morphologic and functional assessment of the heart, pericardium, aorta and its major branches. The structure and function of myocardium and its contractility, the anatomy and function of cardiac valves and coronary artery blood flow can be easily and precisely estimated, as well as the diverse pericardial and aortic diseases. Further developments of NMR in cardiovascular area sound promising, mainly in the field of tissue characterization of atherosclerotic plaques, in the intravascular evaluation and endovascular intervention and it is expected that the technique will play a major role in the cardiovascular intervention of the near future.

Forecasting↗