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Biomedical subjects

R Ramos

Publications and source records attributed to R Ramos.

162 records · Page 9Linked to original sources
PubMedDate not supplied

Hepatic mass in Budd-Chiari syndrome: CT and MRI findings.

We describe a case of Budd-Chiari syndrome, secondary to a hypercoagulable state, which produced a mass lesion on computerized tomography (CT) and magnetic resonance imaging (MRI) examinations. The mass simulated a tumor, but proved to be an area of hemorrhagic necrosis upon biopsy. The finding of a space occupying lesion may not always indicate a tumor in a patient with the Budd-Chiari syndrome. The causes, pathologic changes, and radiologic findings of Budd-Chiari syndrome are discussed.

Adult↗
PubMedDate not supplied

Transjugular intrahepatic portosystemic shunt: correlation of portal vein velocity measurements and portosystemic pressure gradients.

To assess the relationship between portal vein velocity measurements and portosystemic gradients, color Doppler sonography was performed on 12 patients before and after transjugular intrahepatic portosystemic shunt placement. An additional patient was examined before and after shunt modification. The average maximum portal vein velocity increased from 15.7 cm s-1 before shunt placement to 43.5 cm s-1 after shunt placement, while the average portosystemic gradient decreased from 22.0 mm Hg before shunt placement to 7.9 mm Hg after shunt placement. Flow was observed within the shunt in 11 of the 12 cases. Shunt velocity was measurable in nine patients, with an average value of 115.7 cm s-1. Reversal of intrahepatic portal vein flow was observed in 10 cases following shunt placement. Color Doppler sonography is a useful non-invasive tool in the evaluation of intrahepatic portosystemic shunts, and changes in portal vein velocity correlate well with changes in the portosystemic gradient.

Blood Flow Velocity↗
PubMedDate not supplied

Chimeric cells of maternal origin in juvenile idiopathic inflammatory myopathies. Childhood Myositis Heterogeneity Collaborative Group.

We identified maternal microchimerism by fluorescence in-situ hybridisation in magnetically-separated CD4 or CD8 peripheral blood cells of eight of nine male patients with juvenile idiopathic inflammatory myopathy, compared with two of nine healthy male controls. We also found maternal microchimerism in inflammatory lesions (one skin sample and nine muscle biopsy samples) of all ten patients examined, compared with two of ten biopsy samples from patients with other muscle disorders. These results suggest that maternal cells may be involved in the pathogenesis of juvenile idiopathic inflammatory myopathy.

Adolescent↗
PubMedDate not supplied

Nasopharyngeal melanotic melanoma: MR characteristics.

This report presents a rare case of nasopharyngeal melanoma with maxillary sinus extension and lymph node metastasis. The unusual magnetic resonance signal features and the differential diagnosis are discussed.

Adult↗
PubMedDate not supplied

[Epithelioma of the tip of the tongue. Analysis of a series of 1200 cases].

The authors carried out a survey of information proved by 16 institutions on a series of 1200 cases of epithelioma of the tip of the tongue to present before a meeting of European practitioners of curietherapy. They examined indications for curietherapy using radium and iridium alone or in association with external treatment by telecobaltherapy and gives details of the results -- local cures, cures maintained over three and over five years, necroses -- corresponding to the degree of development of the primary tumour. They indicate the possibilites of curietherapy in lesions of varying size and discuss indications for thorough curettage. They draw attention to the fact that lesions at an advanced stage chiefly require external irradiation (Cobalt 60 and gamma photons) or combined irradiation and chemotherapy.

Humans↗
PubMedDate not supplied

[Silent ischemic heart disease in patient with Wegener's necrotizing glomerulonephritis].

Wegener's granulomatosis is a necrotizing vasculitis disorder that usually presents with clinical involvement of the upper and lower respiratory tract in association with renal disease. Although Wegener's granulomatosis can affect other systems, such as the eye, skin, joints, muscle, nerves, gastrointestinal tract and heart, cardiac involvement is traditionally believed to be rare, even though coronary vasculitis can be demonstrated at postmortem examination. We report a patient who has both respiratory and renal involvement who died unexpectedly following a silent myocardial infarct after a period of clinical improve induced by treatment with cyclophosphamide and prednisone.

Adult↗
PubMedDate not supplied

[Cigarette smoking and its relation to pregnancy and lactation in Arica (Chile)].

Cigarette smoker and non smoker mothers from Africa, Chile, were followed along pregnancy and lactation and the influence of cigarette smoking on infant's birth weight and length of lactation was assessed from a sample of 240 pregnant women, 87 (36.3%) of them were actively smoking mothers and 33 among these (37.9%) smoked throughout all pregnancy and lactation. Mothers who smoked along lactation showed significantly shorter exclusive breast feeding time (2.6 month) in comparison with non smokers (3.5 month, p < 0.05) and their total lactation time was also reduced (4.2 vs. 5.3 months respectively, p < 0.01).

Adult↗
PubMedDate not supplied

The reliability of menses to indicate the return of ovulation in breastfeeding women in Manila, The Philippines.

Demographic studies generally use menses to indicate the return of fertility during breastfeeding. In a prospective study of 40 breastfeeding women in Manila, the resumption of ovarian activity was monitored by urinary hormone assays, and menstrual status was determined by weekly interview. For the women who menstruated before six months postpartum, first menses was not a good indicator of ovulation because there was a high proportion of anovular menses (67 percent), and the lag between anovular first menses and subsequent ovulation was 15.7 (+/- 4.4) weeks. After six months postpartum the proportion of anovular first menses declined to 22 percent, and the lag between anovular first menses and ovulation was 7.3 (+/- 4.6) weeks. If all anovular and ovulatory menstrual episodes are considered, the mean interval between first observed menses and first ovulation was 8.4 weeks during the first six months postpartum and only 0.1 week after six months. Thus, in breastfeeding women, menses is an inaccurate proxy measure for the timing of fertility return before six months postpartum, but a good indicator of the resumption of ovulation after six months.

Amenorrhea↗
PubMedDate not supplied

[Xanthogranulomatous pyelonephritis. Our theory and discussion on the development of such an entity. Report of 9 cases].

The authors present 9 cases of xanthogranulomatous pyelonephritis observed in the "Juan XXIII" Hospital in Tarragona. They emphasize the relationship between lithiasis, chronic urinary infection and antigenic stimulation for the development of this entity, the progressive result of a lesion in the kidney tissue with immobilized infectious calcareous deposits. In the granulomatous lesion they find cells called antigen-antibody quartets, with foamy-type histiocytes, the nodular collections of which constitute the key to X.P. The formation of lymphocytic germinal centres is another antigenic stimulus in some parts of the kidney tissue. These structures are due to the storing of antibodies and therefore the immunoglobulins would not be released towards the blood stream, which would explain changes in the immunoglobulins in these patients' serum.

Adult↗