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Biomedical subjects

O Dumas

Publications and source records attributed to O Dumas.

13 recordsLinked to original sources
PubMed2001

[Bile duct papillomatosis: unrecognized preoperative diagnosis].

The diffuse biliary or pancreatic papillomatosis is a rare pathology. Reported cases in the literature underscore the difficulties of preoperative diagnosis of these lesions, their extensive nature, their tendency to relapse, and their malignant potential. The case that we report differs by the isolated involvement of the biliary tract and by the increasing role of imaging (MRCP) for diagnosis and follow-up.

Aged↗
PubMed1993

Endoscopic ultrasonography classification of gastric varices in patients with cirrhosis. Comparison with endoscopic findings.

Endoscopic ultrasonography was performed in 80 cirrhotic patients and 50 control subjects. The aim of the study was to describe and classify the vascular abnormalities of the gastric wall as observed on echoendoscopy in cirrhotic patients and to compare the data with endoscopy. The size of gastric varices was classified into 3 grades: grade 0 (none), grade 1 (small or non-confluent varices < 5 mm), grade 2 (large or confluent varices > or = 5 mm). The abnormalities of the gastric wall were classified into 3 grades: 0 (none), grade 1 (thickening and brilliance of the third hyperechogenic layer with or without fine internal anechogenic structures), grade 2 (visible vessels in the third layer which deform the entire wall, with penetrating varices). Endoscopy provides better visualization of esophageal varices than echoendoscopy but does not detect gastric varices and the first signs of portal hypertension as well. In conclusion echoendoscopy should be a routine examination for screening portal hypertension in cirrhotic patients and could be used in therapeutic follow-up.

Digestive System↗
PubMed1990

[Comparative study of the data of fine-needle aspiration biopsy and echographic aspects of hepatic tumors as a function of the circumstances of discovery. Apropos of 206 patients].

This study was carried out in order to compare the accuracy of ultrasound and ultrasonically guided fine-needle aspiration biopsy in screening for tumoral hepatic syndrome in 206 patients. According to their different clinical presentations, patients were divided into 4 groups: 1: Documented cancer, 2: Hepatic cirrhosis, 3: Fortuitous ultrasonic detection, 4: Clinical hepatic tumor. Cytologic findings were divided into 4 types: benign, primary malignant tumor, secondary malignant tumor (with or without etiologic orientation) non significant result. The ultrasonic and cytologic results were retrospectively compared to definitive diagnosis which was known in 199 patients. No early or delayed complications related to fine-needle aspiration biopsy were recorded. Ultrasonic imaging globally suggested the final diagnosis in 116 patients (diagnostic precision: 58.2 percent) while the cytologic result corresponded to final diagnosis in 183 patients (diagnostic precision: 92.5 percent). Improved results by fine-needle aspiration biopsy with regard to ultrasound was recorded in each group, particularly in group 3; its diagnostic sensitivity was 92 percent for malignant lesions with 100 percent specificity and an excellent value in discriminating between their primitive or secondary nature. Fine-needle aspiration biopsy gave an exact etiologic orientation in half of cases with metastasis and helped to discover the primitive tumor in some patients when this was not known previously. We conclude that fine-needle aspiration biopsy is a simple, moderately invasive and accurate procedure in the diagnosis of hepatic lesions. As ultrasound alone is not suggestive, especially in the case of a fortuitous ultrasonic detection, fine-needle aspiration biopsy improves diagnostic precision.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗