Abstract:
PURPOSE:To determine the proportion of children and young adults in whom the thymus extends superiorly above the level of the manubrium into the anterior cervical tissues on magnetic resonance (MR) imaging studies. MATERIALS AND METHODS:This retrospective study was approved by the institutional review board, and written consent was waived. Sagittal proton density-weighted images from MR imaging examinations of the neck and upper chest were obtained for various indications in 200 consecutive patients (121 male and 79 female; mean age, 9.0 years; interquartile range, 5.2-14.2). Images were retrospectively reviewed for frequency of superior extension of the thymus above the manubrium into the lower neck. When present, the greatest sagittal distance of the cervical extension was measured. Associated deformity of the trachea or great vessels was recorded as absent or present. The association between frequency of cervical extension and age group and sex was evaluated for statistically significant correlation by using chi(2) tests and multiple logistic regression. RESULTS:One hundred thirty-three (66.5%) patients had superior cervical extension of the thymus. The mean distance of the extension above the manubrium was 20.1 mm +/- 6.76 (standard deviation). There was a statistically significant relationship between younger age groups and higher frequency of cervical extension of the thymus (P < .0001). Sex was not a statistically significant factor (P = .1645). No tracheal or vascular deformity was seen in any patient. CONCLUSION:Superior cervical extension of the thymus above the manubrium into the lower neck is normal anatomy in children and young adults. This finding should not be misinterpreted as a pathologic mass.
journal_name
Radiologyjournal_title
Radiologyauthors
Costa NS,Laor T,Donnelly LFdoi
10.1148/radiol.10091792subject
Has Abstractpub_date
2010-07-01 00:00:00pages
238-42issue
1eissn
0033-8419issn
1527-1315pii
radiol.10091792journal_volume
256pub_type
杂志文章相关文献
RADIOLOGY文献大全abstract::Shoulder arthrography is a reliable technique for use in the diagnosis of tears of the rotator cuff, although delineation of the precise site and size of tears requires meticulous double-contrast technique and considerable examiner expertise. The authors initiated a prospective evaluation of digital arthrography of th...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.168.3.3406400
更新日期:1988-09-01 00:00:00
abstract:PURPOSE:To compare diffusion tensor magnetic resonance imaging with conventional T2-weighted imaging for evaluation of white matter changes in patients with Krabbe disease. MATERIALS AND METHODS:In eight patients with Krabbe disease and eight age-matched control subjects, anisotropy maps were generated with diffusion ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.218.3.r01mr14809
更新日期:2001-03-01 00:00:00
abstract:PURPOSE:To assess brachial plexus magnetic resonance (MR) imaging features and limb-girdle muscle abnormalities as signs of muscle denervation in patients with amyotrophic lateral sclerosis (ALS). MATERIALS AND METHODS:This study was approved by the local ethical committees on human studies, and written informed conse...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2015150559
更新日期:2016-05-01 00:00:00
abstract::Magnetic resonance (MR) imaging and computed tomography (CT) were used to study severe syringomyelia, in which the syrinx was so eccentric relative to the center of the spinal cord that at initial examination it appeared to be an exophytic extramedullary mass, in five of six patients with type 2 Arnold-Chiari malforma...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.183.1.1549680
更新日期:1992-04-01 00:00:00
abstract:PURPOSE:To measure serum calcium concentration with three different analytic methods after administration of gadoversetamide and three other gadolinium chelates in dogs. MATERIALS AND METHODS:Six dogs were injected with 0.1-, 0.3-, 1.0-, and 3.0-mmol/kg doses of gadoversetamide; 1.0-mmol/kg doses of gadodiamide, gadop...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2331031689
更新日期:2004-10-01 00:00:00
abstract:PURPOSE:To compare the stress experienced by women who had false-positive screening mammograms and had undergone immediate on-site diagnostic imaging evaluation with that experienced by those who had been recalled for subsequent imaging. MATERIALS AND METHODS:A retrospective survey was mailed to women with false-posit...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.218.1.r01ja35247
更新日期:2001-01-01 00:00:00
abstract::Twenty angiographic procedures involving the superior mesenteric artery (SMA) were performed with balloon occlusion catheters in dogs with chronic liver cirrhosis and portal hypertension. The following complications were found: (a) rapid balloon inflation during angiography due to a leak between the two catheter lumen...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.140.3.7280230
更新日期:1981-09-01 00:00:00
abstract:PURPOSE:To describe the placement of a nasolacrimal polyurethane stent with a new introducer set and hook. MATERIALS AND METHODS:The authors designed a soft polyurethane stent, an introducer that does not require balloon dilation, and a hook that can remove a ball-tipped guide wire from the inferior nasal meatus under...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.194.1.7997560
更新日期:1995-01-01 00:00:00
abstract::The computed tomographic scans of 200 consecutive patients with Crohn disease were studied to determine the frequency and patterns of perirectal and perianal involvement. In 163 patients (82%) abnormalities in the perirectal-perianal region were demonstrated; findings included inflammation of fat planes (73%), bowel w...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.167.2.3357940
更新日期:1988-05-01 00:00:00
abstract:PURPOSE:To prospectively assess the accuracy of unenhanced magnetic resonance (MR) imaging in the detection and localization of labral injuries. MATERIALS AND METHODS:One hundred three patients with clinically suspected shoulder injuries were prospectively examined with unenhanced MR imaging. A combination of gradient...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.200.2.8685350
更新日期:1996-08-01 00:00:00
abstract::The authors report a case of subacute spinal subdural hematoma in a patient with ankylosing spondylitis. Only 18 such cases have been reported in the nonradiological literature. Early diagnosis is imperative in order to minimize neurological sequelae. ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/120.1.116
更新日期:1976-07-01 00:00:00
abstract::The authors present 3 cases of surgically proved Klatskin tumor diagnosed by ultrasound alone. Sonographic features of these tumors include (a) dilatation of the intrahepatic biliary ducts but not the extrahepatic duct, (b) non-union of the right and left hepatic ducts, and (c) small, solid masses at the hepatic hilus...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.148.3.6308710
更新日期:1983-09-01 00:00:00
abstract:PURPOSE:To determine the radiologic characteristics of cystic dystrophy of the duodenal wall. MATERIALS AND METHODS:Ten patients with cystic dystrophy of the duodenal wall and chronic pancreatitis underwent ultrasonography (US) (n = 10), computed tomography (CT) (n = 10), endoscopic US (n = 5), and endoscopic retrogra...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.205.3.9393530
更新日期:1997-12-01 00:00:00
abstract::A patent umbilical vein is a sonographic sign of portal hypertension. The specificity of the sign is not known. In a review of 12 patients with sonographically demonstrated patency of the umbilical vein, we found two patients in whom no clinical evidence existed to suggest the presence of portal hypertension. In six o...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.145.2.7134450
更新日期:1982-11-01 00:00:00
abstract:PURPOSE:To characterize the radiographic features of ventilator-associated Pseudomonas aeruginosa pneumonia (PAP). MATERIALS AND METHODS:In 56 patients (40 men and 16 women), PAP was documented with fiberoptic bronchoscopy. All patients underwent mechanical ventilation for at least 48 hours before diagnosis. The findi...
journal_title:Radiology
pub_type: 杂志文章,多中心研究
doi:10.1148/radiology.195.1.7892480
更新日期:1995-04-01 00:00:00
abstract:PURPOSE:To determine the dose characteristics of multi-detector row computed tomography (CT) and to provide tabulated dose values and rules of thumb that assist in minimizing the radiation dose at multi-detector row CT. MATERIALS AND METHODS:Weighted CT dose index (CTDI100w) values were obtained from three multi-detec...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2263020205
更新日期:2003-03-01 00:00:00
abstract:PURPOSE:To evaluate magnetic resonance (MR) imaging-guided laser-induced thermotherapy (LITT) of liver metastases. MATERIALS AND METHODS:In a phase II study, 20 patients with 33 metastases from colorectal carcinoma (75%) or other primary tumors (25%) underwent LITT. MR thermometry performed with fast low-angle shot se...
journal_title:Radiology
pub_type: 临床试验,杂志文章
doi:10.1148/radiology.196.1.7540310
更新日期:1995-07-01 00:00:00
abstract::Phase-contrast x-ray computed tomography (CT) indicates the distribution of the refractive index and has potential to reveal the structures inside soft tissues without a contrast agent. With a synchrotron x-ray source, phase-contrast x-ray CT with a triple Laue-case x-ray interferometer clearly differentiated various ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.214.1.r00ja08298
更新日期:2000-01-01 00:00:00
abstract::Results of transrectal ultrasound (TRUS) of the prostate and pathologic examination of specimens obtained at transurethral resection of the prostate (TURP) were compared in 29 patients with clinical stage A adenocarcinoma. Ten specimens contained no residual tumors larger than 5 mm in diameter; in the remaining 19 gla...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.179.1.2006300
更新日期:1991-04-01 00:00:00
abstract:PURPOSE:To determine the safety and diagnostic accuracy of a provocative protocol with heparin and urokinase to induce bleeding and determine the source in patients with chronic gastrointestinal hemorrhage. MATERIALS AND METHODS:Nine patients had gastrointestinal bleeding from an indeterminate source and had negative ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.207.1.9530310
更新日期:1998-04-01 00:00:00
abstract::Diagnostic quality of radiographs and adverse reactions associated with the use of metrizamide and iohexol as contrast agents in lumbar myelography were compared in a prospective randomized double blind study in 350 patients at seven centers. The contrast media were administered in comparable volumes at a concentratio...
journal_title:Radiology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1148/radiology.151.3.6371890
更新日期:1984-06-01 00:00:00
abstract:PURPOSE:To determine factors associated with research productivity among all university radiology departments in the United States. MATERIALS AND METHODS:As an observational study, this was exempt from institutional review board approval. All 47,299 radiology articles from 1996 through 2003 that were indexed in the Na...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2373041508
更新日期:2005-12-01 00:00:00
abstract::Transhepatic portal venous embolization does not reduce immediate or long-term mortality or the incidence of rebleeding in patients with acute hemorrhage from gastroesophageal varices. Since in addition the procedure is not without risk to the operator, who is exposed to a considerable amount of radiation, the author ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.148.2.6603000
更新日期:1983-08-01 00:00:00
abstract:PURPOSE:To evaluate the diagnostic performance of coronary computed tomographic (CT) angiography for the diagnosis of mitral valve prolapse (MVP). MATERIALS AND METHODS:The retrospective case-controlled multicenter study protocol was approved by the institutional review boards. The U.S. part of the study was HIPAA com...
journal_title:Radiology
pub_type: 杂志文章,多中心研究
doi:10.1148/radiol.2541090393
更新日期:2010-02-01 00:00:00
abstract::The hemodynamic effects of intra-material prostaglandin E1 (PE1) administered via the angiographic catheter were evaluated in 14 patients. Blood flow in the superior mesenteric artery (SMA) after PGE1 infusion was compared with control SMA blood flow as measured by the "spillover" angiographic reflux method, using a s...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.134.2.7352210
更新日期:1980-02-01 00:00:00
abstract:PURPOSE:To use cardiovascular data from computerized tomographic (CT) pulmonary angiography for facilitating the identification of pulmonary hypertension (PH) in patients without acute pulmonary embolism. MATERIALS AND METHODS:The institutional human research committee approved this retrospective study; informed conse...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.15141269
更新日期:2015-10-01 00:00:00
abstract::Bilateral peripheral pulmonary infiltrates caused by Pneumocystis carinii developed in a patient undergoing mediastinal irradiation after chemotherapy for Hodgkin disease. The paramediastinal part of the lung included within the treatment port remained clear during the 2 1/2 weeks of radiation therapy. The distributio...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.163.3.3495020
更新日期:1987-06-01 00:00:00
abstract:PURPOSE:To assess combined static-dynamic magnetic resonance (MR) urography in the evaluation of congenital urinary tract dilatation in infants and children. MATERIALS AND METHODS:Sixty-two patients with urinary tract dilatation underwent prospective examination with combined static-dynamic MR urography. A combination...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2243011207
更新日期:2002-09-01 00:00:00
abstract::Twenty-six patients with an eqivocal portal defect on conventional nuclear images were evaluated with a multiplane tomographic nuclear scanner and gray scale ultrasound. In most cases the correct determination (normal or abnormal) for an area of decreased uptake could be made from the multiplane tomographic scans. Whe...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/122.3.773
更新日期:1977-03-01 00:00:00
abstract:PURPOSE:To determine the usefulness of endorectal ultrasonography (US) in staging rectal cancer discovered at polypectomy. MATERIALS AND METHODS:Before surgical resection, endorectal US was performed in 18 consecutive patients with adenocarcinoma discovered in polypectomy specimens. A rotating 7-10-MHz endoprobe with ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.211.1.r99ap1231
更新日期:1999-04-01 00:00:00