(n.) The hiding of a heavenly body from sight by the intervention of some other of the heavenly bodies; -- applied especially to eclipses of stars and planets by the moon, and to the eclipses of satellites of planets by their primaries.
(n.) Fig.: The state of being occult.
Example Sentences:
(1) Fecal occult blood was positive in 4 patients and fecal leukocytes were positive in one patient.
(2) The present report details an unusual patient with "occult temporal arteritis" who sustained abrupt monocular visual loss and subsequent ipsilateral ophthalmoplegia involving all functions of the oculomotor nerve.
(3) The concept of almost total breast biopsy has great merit in the discovery of occult carcinoma.
(4) Lateral cervical cystic metastases arising from occult thyroid carcinoma and their ultrasonic differentiation from true cysts are discussed.
(5) The procedure may prove useful for detection of occult infections and may provide a new diagnostic approach in fever of unknown origin.
(6) Previous studies suggest that patients who are in clinical remission harbor tumor in multiple occult "sanctuaries."
(7) While occult breast carcinoma was relatively common in our series (two of 17 patients), the ability to detect the tumor with mammography was disappointing (one of two patients).
(8) A clinico-pathological study of 10 cases (including histopathology) indicates that occult cholesteatoma is neither a congenital cholesteatoma nor an epidermoid cyst, originating in the attic through a melaplastic process of middle ear mucosa behind an intact tympanic membrane.
(9) In order to estimate the diagnostic validity of chemical fecal occult blood tests, i.e.
(10) Arm exercise with myocardial scintigraphy may be an effective method of detecting occult ischemia in patients with peripheral vascular disease.
(11) ), the diagnostic significance (occult carcinoma?, parenchymal asymmetry?, benign or malignant microcalcification?)
(12) The importance of recognising occult CO exposure and of treating symptomatic patients promptly cannot be overemphasized.
(13) In contrast to the immunologically-detected fecal occult blood test, the sensitivity and specificity for CR cancers are surprisingly high, the percentage values in using the Shams test having been found to be 100% and 93.1%, respectively (Shamsuddin).
(14) Accordingly, exacerbation of atherogenesis may accompany release of platelet-associated growth factors (or mitogens) occurring in association with occult, repetitive thrombosis and thrombolysis.
(15) It was found that combining faecal occult blood testing with the health check did not reduce attendance at the health check--43.5% of patients attended when the Haemoccult test kit was offered by the nurse at the health check, 43.6% attended when a test kit was included with the invitation to attend the health check and 42.9% attended when the health check invitation was posted on its own.
(16) Gastric antral vascular ectasia ('water melon stomach') is a poorly documented cause of occult upper gastrointestinal blood loss.
(17) Because cavernous malformations are often angiographically occult and do not have a characteristic appearance on computed tomography (CT), they are seldom recognized preoperatively and may be missed if the surgical specimen is not carefully reviewed.
(18) Taken together, these data demonstrate that dental radiography is not efficacious for the purpose of detecting occult lesions.
(19) A forensic autopsy series of 519 women more than 14 years old was studied for prevalence of benign, atypical, and occult malignant breast lesions.
(20) and metoclopramide stimulation have considerable value in identifying hyperprolactinaemic patients with prolactin-secreting adenomas, particularly those which are radiologically occult.
Thrombosis
Definition:
(n.) The obstruction of a blood vessel by a clot formed at the site of obstruction; -- distinguished from embolism, which is produced by a clot or foreign body brought from a distance.
Example Sentences:
(1) This should not be a serious limitation to the application of the RIA in the detection of venous thrombosis.
(2) In addition to their involvement in thrombosis, activated platelets release growth factors, most notably a platelet-derived growth factor (PDGF) which may be the principal mediator of smooth muscle cell migration from the media into the intima and of smooth muscle cell proliferation in the intima as well as of vasoconstriction.
(3) At present it may be concluded that ORT per se does not place the postmenopausal women at greater risk from developing arterio-venous thrombosis.
(4) Of great influence on the results of measurements are preparation and registration (warm-up-time, amplification, closeness of pressure-system, unhurt catheters), factors relating to equipment and methods (air-bubbles in pressure-system, damping by filters, continuous infusion of the micro-catheter, level of zero-pressure), factors which occur during intravital measurement (pressure-drop along the arteria pulmonalis, influence of normal breathing, great intrapleural pressure changes, pressure damping in the catheter by thrombosis and external disturbances) and last not least positive and negative acceleration forces, which influence the diastolic and systolic pulmonary artery pressure.
(5) We describe 10 patients with cerebral venous thrombosis: two had protein S deficiency, one had protein C deficiency, one was in early pregnancy, and there was a single case of each of the following: dural arteriovenous malformation, intracerebral arteriovenous malformation, bilateral glomus tumours, systemic lupus erythematosus, Wegener's granulomatosis, non-Hodgkin's lymphoma.
(6) It is concluded that the transcutaneous ultrasound technique provides a reliable, rapidly available, non-invasive method to confirm the diagnosis of deep vein thrombosis.
(7) Lupus anticoagulant associated with thrombocytopenia, thrombosis or recurrent abortions was diagnosed in 2 epileptic patients chronically treated with anticonvulsant drugs.
(8) A neonate, with a postconceptual age of 29 weeks, suffered thrombosis of the aorta as a consequence of umbilical artery catheterisation.
(9) The increased risk of thrombosis seen in patients with malignancy also was recently confirmed in breast cancer patients undergoing hormonal or chemotherapeutic treatment.
(10) Anticardiolipin antibodies delineate a recently defined syndrome characterized by venous and arterial thrombosis, thrombocytopenia and recurrent fetal loss, usually in the setting of autoimmune disease.
(11) Seventy-one patients with 80 lower limbs clinically suspected of deep venous thrombosis (DVT) were investigated by both Doppler ultrasound and venography.
(12) Thus, photoinduced vascular thrombosis of a large feeding artery leads to the formation of blood-borne factors that acutely alter cerebral vascular permeability.
(13) In conclusion, this study does not establish any indication or any contraindication in terms of hepatic histopathology with the possible exception of hepatic venous thrombosis for the use of oral testosterone treatment in men with alcoholic cirrhosis.
(14) Molsidomine and SIN-1 were tested in a thrombosis model in which thrombi are produced in small mesenteric vessels.
(15) We present 7 cases of digital artery thrombosis with ischemic symptoms.
(16) Thrombosis of the subclavian vein occurs with these cannulae and is usually asymptomatic.
(17) The right atrium thrombosis in the region of Chiari network resulted in the thromboembolism of the left pulmonary artery this being an immediate cause of death.
(18) In order to prevent thrombosis after implantation, anticoagulant therapy is indicated.
(19) To induce thrombosis we damaged the vessel wall over a short segment by compression and exposed the damaged media to the blood stream.
(20) In venous thrombi, soluble fibrin and fibrinogen exhibited maximum thrombus-blood ratios when they were injected 4 hours after thrombus induction; the thrombus-blood ratio was greater for soluble fibrin than it was for fibrinogen when these agents were injected 4, 8, or 24 hours after thrombosis induction.