Biomedical subjects
Publications and source records attributed to D Matter.
Suprapubic ultrasonography is now routinely used for prostatic examination as it is simple, non-invasive and accurate. Differential diagnosis between benign hypertrophy and cancer is often possible. Evaluation of the size of the prostate is accurate and is a satisfactory means of monitoring the effect of treatment for prostatic cancer.
Real time ultrasonography is routinely used for guidance of percutaneous punctures towards small targets, with three goals: 1. Aspiration biopsies for analysis of an abnormality detected with ultrasonography. 2. Injection of contrast media inside normal structures (urinary, biliary or pancreatic tract) or abnormal collection (cysts, pseudocysts). 3. Treatment by percutaneous sclerosis, aspiration, decompression, drainage.
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Percutaneous needle aspiration was carried out in one case of suprarenal cysts which had already been evaluated by pyelography, echography and angiography. The characteristics of the aspirated liquid pointed towards a benign lesion, and enabled conservative treatment to be initiated. More generally, diagnosis of suprarenal tumors benefits from the direct approach already applied to other abdominal tumors.
A technique for percutaneous puncture is described which employs sectorial scanning real time ultrasonography without a mechanical system for needle control. The method has given satisfactory results in 200 punctures, including one case in which a liver metastasis 13 mm in diameter was detected and another case with a wirsung's duct of 4 mm diameter.
Abdominal pain, ascites and diarrhea revealed acute portal hypertension in a young woman. Ultrasonography and angiography demonstrated the causative congenital arterio-venous fistula of the splenic vessels. Surgery was successfully performed.
Angiography of renal tumors confirms the suspected diagnosis and permits an assessment of regional and metastatic spread during the same procedure, thus providing more information as to operability. Furthermore, preoperative tumor embolisation can be done if applicable -- a technique routinely done by us in cases of large tumors.
Severe hematuria after pyelonephrotomy was controlled by the selective injection of noradrenaline into the renal artery. The indications for this conservative therapeutic technique are defined as well as its place in relation to hemostatic surgical procedures.
This retrospective study was undertaken to assess the place and efficacy of ultrasonography, and ultrasound-guided biopsy in the diagnosis of hepatocellular carcinoma in a series of 34 patients. The sonographic signs were not specific, as tumor patterns were very different from one case to another; there were no pathognomonic signs of hepatocellular carcinoma in comparison with hepatic metastases. Tissue characterization of the liver abnormalities was obtained by percutaneous ultrasound-guided biopsies. In our experience, ultrasonography has a double role: demonstration of hepatic nodules, particularly in high risk patients (cirrhosis); histologic identification of the nodules by ultrasound-guided biopsy.