Publications by authors named "Danais S"

Vasospasm of intracranial vessels is difficult to diagnose on clinical ground alone. Still, a clear diagnosis is important because it can impact on surgical timing; and also because it can help evaluate new treatments. Fifteen patients with sub-arachnoid hemorrhage secondary to aneurysm rupture were submitted to a total of 26 tomographic technetium-99m-hexamethyl-propyleneamine oxime (99mTc-HM-PAO) brain examinations that were correlated with temporally close (generally less than 24 hr) angiography or transmission computed tomography (TCT).

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Because of numerous reports of false positive results with thallium-201 (Tl-201) stress testing in patients with left bundle branch block, the authors decided to evaluate another mode of coronary vasodilatation, dipyridamole, for the diagnosis of coronary atheromatosis. Nine patients were prospectively studied with stress and dipyridamole Tl-201 scintigraphy; both tests were performed within three to 79 days of one another. Five of the patients also had coronary angiograms (four within one year, one five years earlier).

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Two children had polytetrafluoroethylene (PTFE) arteriovenous thigh grafts for hemodialysis access. In one patient, after renal transplantation, a steal syndrome, which prevented renal graft function, developed. The renal transplant functioned promptly when the vascular graft was ligated.

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Intermittent hydronephrosis is a difficult condition to diagnose because of the mild degree of dilatation encountered in imaging studies. The condition nevertheless is disabling and attempts to reach a precise diagnosis include diuretic excretory urography, ultrasonography and renal scans. The delayed double-peak pattern seen on 99mtechnetium-diethylenetriaminepentaacetic acid diuretic renography shows how the ureteropelvic junction can become self-obstructing with forced diuresis.

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Chondromyxoid fibroma is a relatively rare benign bone tumor whose histologic and radiologic patterns are well known. In this article, we describe a 16-year-old boy with such a tumor in his left tibia. Scintigraphically, this tumor is represented by a "doughnut sign".

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Technetium 99m-labeled diisopropyl iminodiacetic acid (99m Tc-DISIDA) hepatobiliary scintigraphy of 26 patients with pathologically proven infantile obstructive cholangiopathy are retrospectively studied according to two types of criteria. Those of type 1 consider 1) hepatocyte clearance 2) hepatobiliary transit time and 3) visualisation of intestinal activity. For biliary atresia, sensitivity of 88.

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Hydronephrosis secondary to an anomalous ureteropelvic junction was detected antenatally in more than 60 neonatal renal units Those 21 units that exhibited partial obstruction or dilatation without obstruction were selected for this study. They were assessed and followed by serial diuretic isotope renography (99mtechnetium-diethylenetriaminepentaacetic acid augmented with furosemide) and ultrasonography. Excretory urography was used selectively.

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Thirty-one synoviortheses were performed in 22 joints of 14 hemophilic patients (aged 12 to 28 years) with chronic synovitis and for whom "conventional treatments" were considered ineffective. Except for patients with inhibitors, conventional treatments included three to six months of adequate prophylactic therapy with the missing coagulation factors, intensive physiotherapy and, when indicated, antiinflammatory agents and orthosis. Colloidal 32P chromic phosphate was injected intraarticularly in doses of 1.

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A 3-year-old boy with relapsing nephrosis presented with a left sided varicocele. Echographic studies demonstrated enlargement of the left kidney, and there was delayed excretion on renal scintigraphy suggesting the presence of renal vein thrombosis. The varicocele resolved with remission of his nephrosis.

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We have reviewed 39 cases of ruptured spleen in children from 1979 to march 1983 at Ste-Justine Hospital in Montreal. We were mainly interested in the role of ultrasonography, its value and limitations. The practical management is exposed.

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Between 1979 and june 1983, 46 splenic trauma, with or without associated lesions, have been treated at Sainte'-Justine's Hospital. 8 children had a splenectomy, 3 had a laparotomy for other lesions without a splenectomy was done. 35 had a non operative management of splenic trauma.

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Problems of methodology, organization, and evaluation confronting the radiology departments of the university hospitals affiliated with the University of Montreal, the medical students, and the University itself in connection with an elective internship in radiology offered in the fifth year of medicine, resulted in the formation of a committee to reorganize the course of study. In this concise article the authors describe this and other measures taken by the University to solve these problems. The committees' main purpose was to restructure the internship which was made compulsory so that future physicians would be prepared to draw on the resources of diagnostic radiology and nuclear medicine.

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Two patients with infantile cortical hyperostosis (Caffey's disease) are presented in whom radionuclide imaging with 99mTc-MDP and 67Gallium-citrate was performed to eliminate multifocal osteomyelitis as a diagnosis. The scintigraphic appearance of this relatively uncommon disease of children was similar to that obtained in multifocal osteomyelitis; all osseous lesions showed a marked uptake of both radiotracers. However, the distribution of abnormalities (mandible, scapulae) and the degree of extension (mainly diaphyseal) of the lesions are important characteristics in the scintigraphic differential diagnosis but bone radiographs are best used in making the diagnosis.

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