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Results for “Dilatation, Pathologic”

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At least 19 recordsLinked to original sources
PubMed1978

[Comparative studies of various suture techniques in transthoracic esophagogastric anastomoses in dogs (author's transl)].

In 27 dogs esophagogastric anastomoses were performed in a single-layered end-on, a three-layered end-on and a double-layered inverting technique. The anastomoses were reinvestigated on the 2., 4., 7., 15. and 30. postoperative day. Suture line leakages were not observed. The inverted suture resulted in considerable anastomotic stenosis, ulceration of the mucosa, disordered and initially incomplete revascularisation, and widespread granulomatous inflammatory reaction. In contrast, the end-on technique led to almost no stenosis, ordered revascularisation, and narrow and delicate scar tissue formation while maintaining a normally layered structure. The single-layered methode was superior to the three-layered one. The best results were obtained by the extramucous technique.

Animals↗
PubMed2026

Inflammatory cytokines mediate thoracic aortic aneurysm formation via plasma metabolites: A two-step Mendelian randomization and single cell sequencing-based investigation.

Thoracic aortic aneurysm (TAA) is a life-threatening condition characterized by pathological dilation of the aorta. While inflammatory responses have been implicated in TAA pathogenesis, the causal relationships remain elusive. This study aimed to elucidate potential causal associations between inflammatory cytokines, plasma metabolites, and TAA risk using Mendelian randomization (MR) analysis. We conducted bidirectional two-sample MR analysis utilizing genome-wide association study data from 91 inflammatory cytokines (n = 14,824), 1400 plasma metabolites (n = 8299), and TAA (n = 385,857). The inverse-variance weighted method served as the primary analytical approach, with comprehensive sensitivity analyses performed to assess pleiotropy and heterogeneity. Two-step MR analysis was employed to explore potential mediating roles of plasma metabolites. Single-cell sequencing analysis was utilized to detect cell type enrichment and elucidate cellular functions of identified cytokines. Additionally, we conducted an analysis to identify druggable proteins as potential therapeutic targets for TAA. MR analysis revealed that genetically-determined increases in C-X-C motif chemokine 10 (CXCL10) (odds ratios [OR] = 1.149, 95% confidence interval [CI]: 1.009-1.309, P = .037) and fibroblast growth factor 5 (OR = 1.101, 95% CI: 1.013-1.196, P = .024) were associated with elevated TAA risk. Conversely, C-C motif chemokine 20 (CCL20) (OR = 0.870, 95% CI: 0.759-0.996, P = .043) and CD40L receptor (CD40) (OR = 0.906, 95% CI: 0.827-0.992, P = .033) demonstrated inverse associations with TAA risk. Two-step MR analysis identified potential mediating metabolites: the phosphate to linoleoyl-arachidonoyl-glycerol ratio for CXCL10, thyroxine and X-24585 for FGF-5, and the creatine to carnitine ratio for CCL20. Single-cell sequencing analysis revealed enrichment of these cytokines in specific cell types and pathways relevant to TAA pathogenesis. Drug-gene interaction analysis identified CXCL10, CCL20, and CD40 as potential targets for treatment of TAA. This study provides robust genetic evidence supporting causal relationships between specific inflammatory cytokines and TAA risk, with plasma metabolites potentially mediating these effects. CXCL10 and FGF-5 were identified as potential risk factors, while CCL20 and CD40 may confer protective effects. These findings offer novel insights into TAA pathogenesis and suggest potential targets for intervention. Further research is warranted to elucidate the underlying mechanisms and validate these results across diverse populations.

Aortic Aneurysm, Thoracic↗
PubMed1979

Echocardiographic findings in ventricular septal rupture and anterior wall aneurysm complicating myocardial infarction.

Echocardiographic findings in a patient with ventricular septal rupture and anterolateral wall aneurysm complicating myocardial infarction are presented. The findings were confirmed by cardiac catheterization and surgery. Using M-mode ultrasonocardiography one was able to demonstrate and localize the aneurysm as well as the ventricular septal defect which presented as an oblique interventricular communication appearing only during systole. Thus echocardiography supplemented the invasive examinations in exactly revealing the site of ventricular septal rupture. Other echocardiographic features of ventricular septal rupture were right ventricular dilatation, pathological septal motion and abnormal tricuspid valve motion as recently reported by other authors.

Cardiac Catheterization↗
PubMed1979

Ultrasonography of the brachiocephalic arteries.

Sixteen patients with various lesions involving the brachiocephalic arteries were studied ultrasonographically. The examination was very useful in diagnosing aneurysms of the peripheral arteries and in differentiating an aneurysm from other causes of palpable pulsatile masses, such as a tortuous artery and tumor beneath an artery. The ultrasound technique used for evaluation of these lesions is described.

Adult↗
PubMed1979

Orthopaedic features in the presentation of syringomyelia.

The orthopaedic surgeon is often the first consultant to whom a patient with syringomyelia is referred. The disease is not as rare as he may suppose, but its early presenting features are very variable; if he relies solely on such familiar features as pes cavus and scoliosis, he may well miss the diagnosis. The commonest presenting symptom is pain in the head, neck, trunk or limbs; headache or neckache made worse by straining is particularly significant. A history of birth injury also may suggest the possibility of syringomyelia, especially if any spasticity subsequently worsens. Neurological features which may be diagnostic include nystagmus, dissociated sensory loss, muscle wasting, spasticity of the lower limbs or Charcot's joints. Radiographic features include erosion of the bodies of cervical vertebrae and widening of the spinal canal; if, at C5, the size of the canal exceeds that of the body by 6 millimetres in the adult, pathological dilatation is present. The presence of basilar invagination or other abnormalities of the foramen magnum, of spina bifida occulta and of scoliosis are further pointers. Thermography is a useful way of showing asymmetrical sympathetic involvement in early cases. A greater awareness of the prevalence of syringomyelia may lead to earlier diagnosis and to early operation, which appears to hold out the best hope of arresting what is all too commonly a severely disabling and progressive condition.

Adolescent↗
PubMed1975

[Coronaro-myocardial interplay determining the instantaneous mean ventricular shape (author's transl)].

A working hypothesis on the mechanism of diastolic chamber expansion based on functional anatomy and physiology is developed. It should be a major determinant of the momentary average chamber width. The sum of all intramyocardial fluid-filled spaces and the myocardium itself are considered in the working hypothesis as the hydraulic medium of a process which can be summarised under the term "cavernous body mechanism". The most important factor of this hydraulic system should represent the intramural fluid volume (hydraulic medium) and the contractile-elastic tension development in the transmural direction of the chamber wall. Morphological analysis of myocardial structure shows that an endoepicardial direction of force in the myocardial net can be recognised. The "motor" of circular fibres of the middle layer is surrounded by the spiral course of the fibres of the inner and outer layers of the chamber wall (uvula mechanism). It is interwoven by very dense bifurcating myocardial fibres (structural principle of the tongue). By these means, the width of the chamber cone is influenced decisively by an active decrease in wall thickness. The coronary perfusion pressure is thought to have a chamber dilating influence in the sense of a "cavernous body mechanism". The hypothesis presented helps us to understand pathological chamber dilation secondary to transmural myocardial fibrosis. Such a narrow functional coronary-myocardial interaction gives the myocardium two functions; besides haemodynamic pumping, the cardial muscle must function as an internal antagonist to favour diastolic chamber dilation.

Animals↗
PubMed1979

A new instrument for inserting a U tube.

A new instrument for the placement of U tubes through malignant and benign biliary strictures consists of a 3 mm Bakes dilator modified by a circumferential groove and a small hole through its tip.

Bile Duct Neoplasms↗
PubMed1978

Neonatal detection and evaluation of infantile polycystic disease by gray scale echography.

Infantile polycystic disease (IPCD) is an uncommon pathologic entity involving the kidneys and liver. Gray scale echography can detect this pathologic process within the kidneys, despite the presence of renal failure. In addition, the sonic study may detect associated hepatic abnormalities even though isotopic liver scan is normal. These capabilities make the ultrasonic examination uniquely suited for evaluating patients with IPCD.

Cysts↗
PubMed1978

[The radiological differential diagnosis of small bowel disease (author's transl)].

The flow diagram of Goldberg and Sheft for the differential diagnosis of diseases of the small bowel was modified (using as its basis mucosal swelling, width of lumen, secretion). Its accuracy was then tested retrospectively in 61 patients. Examination of the small bowel was performed after the administration of a single large dose of contrast medium. A surprisingly high accuracy of 90% was found in 41 pathologically proven cases; all normal patients were correctly identified. The method therefore appears to be extremely promising. More detailed identification is not always possible because of similar reaction of the small bowel to various influences; it may be possible on some occasions, or when taking account of further radiological signs, or of the clinical and laboratory findings.

Contrast Media↗
PubMed1977

Optic disc edema in raised intracranial pressure. II. Early detection with fluorescein fundus angiography and stereoscopic color photography.

Optic disc edema (ODE) due to chronic intracranial hypertension was produced experimentally in rhesus monkeys. Serial studies of fundus changes at frequent intervals, by routine ophthalmoscopy, steroscopic color photography, and fluorescein angiography, revealed that swelling of the optic disc was the first sign of ODE. Other early signs were striation of nerve fibers on the optic disc margins and peripapillary retina, blurring of the disc margins, hyperemia of the disc and capillary dilation, hemorrhages, and other retinal vascular changes; these usually appeared in that sequence. The classically described signs of early ODE were almost always absent. A normal fluorescein fundus angiogram during the incipient stage did not rule out ODE. Stereoscopic color fundus photography was the most sensitive means of detecting early ODE. Fluorescein angiography did not show changes till edema was of a mild to moderate degree; routine ophthalmoscopy was the least reliable method.

Aneurysm↗
PubMed1977

Ventricular dilation preceding rapid head growth following neonatal intracranial hemorrhage.

We describe two patients in whom ventricular dilation began within a week of neonatal intraventricular hemorrhage and preceded rapid head growth and clinical signs of increased intracranial pressure by days to weeks. The posthemorrhagic ventricular dilation is readily demonstrated in the neonatal period by computerized tomography of the cranium. These data indicate the importance of careful follow-up of survivors of intraventricular hemorrhage, early demonstration of ventricular dilation and prompt therapeutic intervention to prevent brain injury.

Cephalometry↗
PubMed1979

Computerized tomography in the diagnostic evaluation of multiple sclerosis.

Sixty-six patients with a tentative or certain diagnosis of multiple sclerosis (MS) were examined with cranial computerized tomography (CT). Abnormalities found in 19 (29%) included discrete areas of decreased white matter density, enlarged ventricles, cortical atrophy, and focal areas of contrast enhancement. The presence of white matter lucencies and ventricular dilatation correlated with an increased incidence of diffuse hyperreflexia and mental impairment. Since half the patients with contrast-enhancing lesions were clinically stable, their lesions may represent acute asymptomatic plaques. Abnormalities on CT scan were observed more often in older patients whose disease had lasted longer and was clinically more definite. Since findings were sparse in early, less definite disease, the use of CT as a purely diagnostic tool is limited.

Adult↗
PubMed1979

Toxic dilatation of the colon in salmonella colitis and inflammatory bowel disease.

Toxic dilatation of the colon may be due to inflammatory bowel disease, either ulcerative colitis or Crohn's disease of the colon, but recent experience has shown that infective colitis due to salmonella can produce this complication. We present 13 cases with toxic dilatation (9 inflammatory bowel disease and 4 salmonellosis) and outline the diagnostic features and treatment in these patients. It is important to distinguish salmonellosis at an early stage because, whilst toxic dilatation in inflammatory bowel disease is an absolute indication for surgical treatment, cases with this complication due to salmonellosis may be treated conservatively in the majority of instances.

Adolescent↗