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C Matos

Publications and source records attributed to C Matos.

At least 73 records · Page 4Linked to original sources
PubMed1990

Hyaline membrane disease in the newborn: diagnosis by ultrasound.

The authors report a new method of diagnosing hyaline membrane disease (HMD) in newborns: ultrasound. Babies with HMD display a specific pattern with retrohepatic hyperechogenicity on abdominal ultrasound. The specificity of the pattern was verified in 40 prematures with respiratory distress syndrome. The sign was present in 24, and in 22 of these the final diagnosis was moderate or marked HMD. In the last 2, mild HMD was suggested. The pattern was absent in the 16 others, none of whom had HMD. The pattern probably results from an ultrasound artifact: summation of multiple aerated airways surrounded by collapsed alveoli. Follow-up examinations were possible in 13 babies with HMD. Hyperechogenicity disappeared in 8 of these patients within 6-9 days and in 3 within 10-20 days; it persisted for 60 and 70 days in 2 with bronchopulmonary dysplasia. In conclusion, retrohepatic hyperechogenicity in newborns is pathognomonic for HMD and allows an instant diagnosis. The persistence of the pattern could be a useful criterion for evaluation of the prognosis.

Diagnosis, Differential↗
PubMed1990

New device for endoscopic cystoenterostomy.

A new device for endoscopic treatment of pancreatic pseudocysts is described. It aims to provide improved safety and ease of performance of endoscopic cystoenterostomy, even in difficult cases of massive compression of the intestinal wall with upper gastrointestinal obstruction. In this preliminary report, nine patients have been treated without complication.

Adult↗
PubMed1989

Hypothesis: reduced renal mass with glomerular hyperfiltration, a cause of renal hyperechogenicity in children.

A group of 10 pediatric patients had renal hyperechogenicity and reduced renal mass. The authors wish to suggest a relationship between renal hyperechogenicity and glomerular hyperfiltration according to Brenner's theory on the progressive nature of kidney disease. Reduced renal mass was related to multicystic dysplastic kidney (3 cases) nephrectomy (3 cases) and to reflux nephropathy (4 cases). The hyperechogenicity was diffuse in 6 cases with the preservation of cortico-medullary differentiation and was localized in all four cases of reflux nephropathy producing a "pseudotumoral" appearance. Hyperfiltration was confirmed by isotope studies in all 3 cases where it was performed. This condition together with secondary glomerulosclerosis could explain hyperechogenicity. The predictive value of such patterns are still unclear; yet such findings should lead to appropriate radiolocal, functional, clinical and dietary measures.

Child↗
PubMed1989

Percutaneous drainage of subphrenic abscesses.

Forty subphrenic abscesses were drained percutaneously in 37 patients. These abscesses were subsequent to abdominal surgery (28 patients), biliary obstruction and/or fistula (six patients), trauma (two patients) or acute pancreatitis (one patient). The procedures were usually monitored by duplex sonography and fluoroscopy (35 out of 40 cases), with an angled subcostal approach to the subphrenic space in over 85% of the cases. Forty-three drainage catheters were inserted using the Seldinger method; 37 (86%) had a size of 12 F or more, 21 were 16 F in size. Only two out of 43 catheters were double-lumen sump drains. The clinical condition improved after insertion of the catheter in all 37 patients. Definitive successful drainage, defined as hospital discharge without complementary surgery, was achieved in 32 patients (87%), without major complications. A temporizing effect was obtained in three additional patients (8%) who underwent curative surgery for the underlying process after complete drainage of the abscess. Two patients died from multiple organ failure before their abscess healed. Considerations for successful drainage of subphrenic abscesses include a good knowledge of the subphrenic space anatomy, the use of large-bore drainage catheters and the recognition and correct management of underlying enteric, biliary or pancreatic fistulas.

Adolescent↗
PubMed1988

US demonstration of pyelitis and ureteritis in children.

The authors report a new ultrasonic sign of urinary tract infection in children: thickening of the renal pelvis and/or ureteral wall. This thickening as encountered in 10 children, (10 months to 12 years) all with urinary tract infection, appears to result from inflammatory changes and to correspond to a sonographic sign of pyelitis and ureteritis. These alterations of the walls are similar to striations and folds described in this pathology on intravenous pyelograms. The thickening was the only sign of abnormality of the urinary tract in two cases; it was observed without reflux in four cases. The demonstration of this pattern should lead to further uroradiological investigations and to appropriate treatment.

Child↗
PubMed1988

Midline omphalovesical anomalies in children: contribution of ultrasound imaging.

Based on reports of 9 surgically proven cases, the authors stress the contribution of high-resolution sonography in the work-up of omphalovesical midline anomalies in children. Sonography (US) proved useful, especially in disorders of urachal patency (cystic mass and sinus type of the malformation). In the cystic-type mass (3 cases), a midabdominal echogenic cystic mass was demonstrated. The echogenic content resulted from infectious complication. In the sinus type, an echogenic, thickened, tubular omphalovesical tract (8-15 mm) was visualized. This tubular configuration results from the normal omphalovesical anatomy, as can be demonstrated by high-resolution US. With infection, the fascia surrounding the urachal remnants seems to limit the infection. Differential diagnosis should include vesical duplications anomalies, dystrophic calcifications of the umbilical arteries remnants, and, in case of a solid mass, urachal carcinoma. Ultrasound should be part of the work-up of any suspected urachal or other midline anomaly.

Child, Preschool↗
PubMed1988

Non-obstructive kidney transplant dysfunction: magnetic resonance evaluation.

The value of magnetic resonance imaging in the differential diagnosis of non-obstructive dysfunction of renal allografts was studied in a series of 58 examinations at 0.5 T. Four parameters were evaluated: the corticomedullary differentiation; the relative thickness of the cortex; the evolution, with echo number, of the relative signal intensities of kidney parenchyma and adjacent fatty tissue on images generated by a long time to repeat multiecho sequence; and the proximal vascularization. The loss of corticomedullary differentiation is the major finding in acute rejection, but it is not specific as it is also observed in chronic rejection and in the much rarer acute glomerulonephritis. Thickening of the cortex is helpful for the detection of rejected transplants with visible corticomedullary delineation (26% of the cases). Uncomplicated acute tubular necrosis appears as a normal transplant.

Adolescent↗
PubMed1987

Pheochromocytoma.

Explore the source record for details and available documents.

Adrenal Gland Neoplasms↗
PubMed1987

Sonographic demonstration of portal venous system thromboses secondary to inflammatory diseases of the pancreas.

Sonographic demonstration of abdominal venous thromboses subsequent to pancreatic benign inflammatory diseases has been seldom reported up to now. Seven cases of thromboses of the portal venous system associated with acute or chronic pancreatitis are reported. All cases were detected by sonography in patients without clinical manifestations of portal hypertension. Echogenic thrombus within the lumen of the vein was observed only in the short-term follow-up of acute pancreatitis. Cavernomatous transformation was observed in 6 patients with long-term calcifying pancreatitis. Extrinsic compression by pseudocyst of the pancreas was observed in only 1 case. In all the other cases, thromboses seems to be secondary to local inflammatory phenomena during previous episodes of acute pancreatitis.

Acute Disease↗
PubMed1987

Hepatic artery aneurysm: CT and MR features.

The authors report a case of common hepatic artery aneurysm diagnosed by computed tomography (CT) and magnetic resonance (MR). Features of both techniques are described and discussed. The surgical and radiologic literature is reviewed.

Aneurysm↗
PubMed1987

Omental panniculitis: an unusual cause of acute appendiceal syndrome.

We report the case of a 41-year-old patient with no history of abdominal symptoms who presented with an acute painful syndrome of the right flank and iliac fossa suggesting acute appendicitis. The diagnosis of panniculitis of the great omentum was suggested preoperatively by the particular aspect of omental fat observed by abdominal sonography and computed tomography. A subvoval omentum resection was performed and the outcome was uneventful.

Adult↗
PubMed1987

Development of the hypodysplastic kidney: contribution of antenatal US diagnosis.

Two cases of fetal perirenal uriniferous pseudocyst were diagnosed in utero with ultrasound studies. The perirenal collections resolved spontaneously in utero. Follow-up examination showed growth impairment of the affected kidney. At birth, no renal function was demonstrated in one case and only slight function in the other case. Pathologic examination showed a highly dysplastic kidney with extravasated urine in the case in which surgery was performed. Some hypodysplastic kidneys apparently result from acute in utero obstruction with secondary pyelocalyceal rupture. Renal dysplasia could render the kidney more vulnerable to such phenomena.

Adult↗
PubMed1987

Total parenteral nutrition (TPN) and gallbladder diseases in neonates. Sonographic assessment.

During a 1-year period, a prospective ultrasound (US) study of the biliary tract was performed in 41 neonates receiving total parenteral nutrition (TPN). Gallbladder sludge appeared in 18 neonates (44%) after a mean period of 10 days of TPN. The occurrence of this abnormality seems related to three main factors: prematurity with immaturity of the enterohepatic circulation of bile acids, duration of TPN, and lack of enteral nutrition. In five neonates (12%), an evolution of sludge to "sludge balls" was observed. Two neonates (5%) went on to develop uncomplicated gallstones and a spontaneous resolution occurred in one of them 6 months after the examination. This finding suggests conservative management in such cases. However, since cholecystitis or biliary tract obstruction are classical complications in older children, a US survey of neonates receiving TPN is useful to follow the abnormal gallbladder content, and rapid introduction of enteral feeding is advisable.

Cholelithiasis↗