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Biomedical subjects

J D Picard

Publications and source records attributed to J D Picard.

At least 37 records · Page 2Linked to original sources
PubMed1983

[Tomodensitometry in pheochromocytomas].

An atlas of the various appearances of pheochromocytoma on CAT scanning demonstrates the value of this method. Most diagnostic problems can be resolved whatever the presenting signs. This investigation locates the tumour(s) and determines their extension, so constituting an essential part of the preoperative work-up.

Adrenal Gland Neoplasms↗
PubMed1982

[Angioplasty of the arteries of the extremities. Early and mid-term results (up to 3 years) in 492 cases].

Results of iliac, femoral and/or iliac artery percutaneous transluminal angioplasty (P.T.A.) in 492 cases are presented, and the latest technical improvements in the procedure reviewed. Short and medium-term results in iliac artery stenoses were excellent (98 and 96% respectively), obstructions in this region not being treated. The advantage of P.T.A. over surgery is the lack of exposure of patients to the risk of circulatory insufficiency. Very good results were obtained in stenosis of the distal femoral artery, the method being much less effective in cases of long thrombosis. The essential indications are all types of stenosis of limb arteries, while contraindications can be summarized as iliac artery obstructions (because of possible severe retroperitoneal hematomas) and massive atheromatous calcifications. Aortic and graft stenoses are particular indications. Complications are mainly hematomas and thromboses, but these can be reduced in incidence by increasing experience of radiologists in the use of P.T.A. and by improved selection of patients. Progress will also depend on improved control of anticoagulant and thrombolytic treatments. The question is raised as to the need to treat early claudication due to femoral artery stenosis following detection by the Doppler effect test. The essential argument in favor of P.T.A. is the simplicity and safety of the method to the compared reconstructive surgery, a method involving too high a risk.

Aged↗
PubMed1981

Visibility and thickening of the renal fascia on computed tomograms.

The renal fascia can be seen on CT scans (using appropriate window settings) in most patients except those with very little fat. CT confirms current anatomical concepts; however, contrary to the illustrations shown in the literature, it clearly demonstrates that the anterior pararenal space normally exists only at the level of the retroperitoneal organs. A lesion would distend the space. While visualization of the renal fascia on normal urograms may be an indication of renal disease, a thin renal fascia on CT scans has no pathological significance. Thickening is nonspecific: it is not pathognomonic of tumor, nor is it helpful in differentiating pancreatitis from neoplasm. On the other hand, lack of fascial thickening may be helpful in ruling out renal extension of a neighboring lesion.

Carcinoma, Hepatocellular↗
PubMed1981

Computed tomography of multilocular cystic nephroma.

Three cases of multilocular cystic nephroma (MNC) tht were demonstrated by computed tomography (CT) are described. In two cases a correct preoperative diagnosis was made. In the third case, however, the mass did not fit exactly the histologic criteria for MCN. MCN appears on CT scans as a well-marginated, rounded, or polycyclic cortical mass that extends beyond the normal renal outline. This mass contains cysts that vary in size and number. It may be a cluster of a few large cysts with thick walls and septa, or it may be a denser mass composed of tiny cysts. This CT pattern is suggestive of MCN, but is not sufficient to obviate surgery. However, as part of a complete preoperative evaluation including arteriography, CT provides information that may be valuable in limiting the surgical procedure, perhaps avoiding unnecessary nephrectomy.

Angiography↗