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1.
Michele Scialpi Rosanna Andreatta Silvio Agugiaro Franco Zottele Mauro Niccolini Francesco Dalla Palma 《Abdominal imaging》1993,18(4):381-389
Transrectal ultrasound (TRUS) was performed preoperatively in 35 patients with rectal carcinoma and the results were compared to histologic findings. In the same group, postoperative studies were performed in 22 patients; in women, transvaginal ultrasound (TVUS) was added to the transrectal study. According to Duke's classification modified by Astler-Coller, in relation to the T parameter, TRUS correctly staged 33 of 35 neoplasms (accuracy, 94.3%); one was overstaged and one was understaged. In detection of lymph node involvement, accuracy was 74% (sensitivity 69%, specificity 73.9%). Recurrent local tumors, histologically confirmed, developed in two of 22 postoperative patients who had undergone curative anterior resection. This study demonstrates that TRUS is an accurate method in preoperative staging of rectal carcinoma. In the prospective study, the role of follow-up TRUS and TVUS in detection of local recurrences is evaluated. 相似文献
2.
Preoperative evaluation of gastric cancer: value of spiral CT during gastric arteriography (CTGA) 总被引:7,自引:0,他引:7
Background: To evaluate the utility of dual-phase spiral computed tomography during gastric arteriography (CTGA) in the preoperative
staging of gastric cancers.
Methods: We performed CTGA in 21 patients with pathologically proven gastric cancers. CTGA findings were prospectively analyzed and
correlated with surgical and pathologic findings. Dual-phase scans were performed at 10 s (early) and 60–100 s (delayed) after
injection of 120 mL of contrast medium at an injection rate of 6 mL/s through a preset 5-Fr catheter positioned in the celiac
trunk. Spiral CT scans were assessed for enhancing pattern of the normal gastric wall, tumor detectability, and accuracy of
tumor staging.
Results: Normal gastric mucosa was clearly visible as two or three layers in all patients on early-phase scans and in eight patients
on delayed-phase scans. The primary tumors were correctly detected with CTGA in seven (88%) of the eight early gastric cancers
and in all 13 (100%) advanced gastric cancers. The accuracy of CTGA for T staging was 50% and 77% in early and advanced gastric
cancers, respectively. The overall accuracy for tumor detection and T staging was 95% and 67%, respectively. The accuracy
of CTGA for the degree of serosal invasion and regional lymph node metastasis was 77% and 76%, respectively.
Conclusion: The CTGA technique improved tumor detection rate and accuracy of tumor staging, especially in early gastric cancer, and may
be very useful in the preoperative staging of gastric cancer.
Received: 31 August 2000/Accepted: 20 September 2000 相似文献
3.
R. A. Huch Böni C. Meyenberger J. Pok Lundquist F. Trinkler U. Lütolf G. P. Krestin 《Abdominal imaging》1996,21(4):345-352
Background: To compare endorectal coil magnetic resonance imaging (MRI) with body coil MRI in detecting local recurrence of gynecologic
tumors and prostate and rectal cancers.
Methods: Forty-six patients with suspected recurrent pelvic malignancies (13 gynecologic, 15 prostatic, and 18 anorectal primaries)
were enrolled in the study. Axial T1- and T2-weighted body coil images and T2- and contrast-enhanced T1-weighted axial endorectal
coil images were obtained on a 1.5 T system. Results of the MR examinations were compared with histogical findings and follow-up
examinations with respect to the diagnostic accuracy and diagnostic confidence for assessment or exclusion of local recurrence.
Results: Recurrent disease was histologically confirmed in eight patients with primary gynecologic malignancies, seven with suspected
prostatic recurrence, and seven with suspected anorectal recurrence. Overall, accuracy of body coil MRI was 67% for gynecologic
tumors, 36% for prostatic recurrences, and 59% for rectal recurrences. T2- and contrast-enhanced T1-weighted endorectal sequences
yielded similar results, with an accuracy of 73% for depiction of gynecologic recurrence, 77% for prostatic recurrence, and
77% for rectal recurrence. The difference in accuracy between body coil and endorectal coil examinations was statistically
significant (p < 0.05) only for prostatic cancer. Diagnostic confidence was, however, significantly improved (p < 0.05) in all tumors (T2-weighted endorectal coil examination was superior to T2-weighted body coil images in 71% of cases).
Conclusion: Although the results of endorectal coil MRI are only slightly superior to those of body coil MRI for the detection of recurrent
gynecologic and anorectal tumors, diagnosis can be made with greater diagnostic confidence in many cases. For detection of
prostatic recurrence, endorectal MRI is highly recommended.
Received: 27 April 1995/Accepted: 17 June 1995 相似文献
4.
Endorectal surface coil MR imaging as a staging technique for rectal carcinoma: a comparison study to rectal endosonography 总被引:16,自引:0,他引:16
Background: Preoperative staging of rectal cancer is critical for guiding therapy and prescribing the most appropriate treatment option.
The purpose of this investigation was to compare the accuracy of endorectal surface coil magnetic resonance imaging (ERSCMRI)
with endosonography (EUS) in staging rectal lesions.
Methods: Fourteen patients with rectal carcinoma, initially detected by barium enema or sigmoidoscopy underwent ERSCMRI and EUS. Subsequent
resection of the lesions was performed, and the staging accuracies of these two modalities are compared.
Results: MR T-staging agreement with pathologic T-staging was similar to that of EUS, but MR enabled more accurate identification
of nodal involvement.
Conclusion: ERSCMRI produced greater overall accuracy in staging for rectal carcinoma than did EUS.
Received: 10 September 1998/Revision accepted: 10 February 1999 相似文献
5.
Preoperative assessment of local tumor extent in advanced rectal cancer: CT or high-resolution MRI? 总被引:10,自引:0,他引:10
Beets-Tan RG Beets GL Borstlap AC Oei TK Teune TM von Meyenfeldt MF van Engelshoven JM 《Abdominal imaging》2000,25(5):533-541
Background: We compared high-resolution magnetic resonance imaging (MRI) with computed tomography (CT) in the assessment of tumor infiltration
in surrounding structures for locally advanced primary and recurrent rectal cancer.
Methods: Twenty-six patients with operable, locally advanced rectal cancer (15 recurrent and 11 primary) were evaluated with conventional
pelvic CT and 1.5-T high-resolution MRI with a quadrature phased-array coil. The images were scored for invasion of nine neighboring
pelvic structures, and the results were compared with surgical and histologic findings.
Results: A total of 234 structures in 26 patients was evaluated for tumor invasion. For MRI the, sensitivity was 97% and the specificity
98%; for CT, the sensitivity was 70% and the specificity was 85%. The difference in performance was statistically significant
(p < 0.001). The failure most frequently made on CT was the false-positive prediction of pelvic floor and piriform muscle invasion
(14), whereas MRI showed only four false-positive predictions. MRI correctly predicted all four cases of sacral bone invasion,
three of which were missed by CT. MRI was accurate in 20 patients (80%) and CT in only five patients (19%).
Conclusion: High-resolution MRI using a quadrature phased-array coil is highly accurate and superior to CT in predicting tumor infiltration
in surrounding structures for locally advanced primary or recurrent rectal cancer and is recommended in the preoperative work-up
of these tumors.
Received: 21 September 1999/Revision accepted: 26 January 2000 相似文献
6.
Value of the dynamic and delayed MR sequence with Gd-DTPA in the T-staging of stomach cancer: correlation with the histopathology 总被引:21,自引:0,他引:21
Background: To evaluate the usefulness of dynamic and delayed magnetic resonance (MR) imaging in the T-staging of stomach cancer and
to compare the enhancement pattern of the cancerous lesion and the normal wall.
Methods: We performed MR imaging in 46 patients with stomach cancer (including four early gastric cancers and 42 advanced gastric
cancers). Axial, sagittal, or coronal two-dimensional fast low-angle shot) MR images for the water-distended stomach were
obtained with dynamic protocol, including precontrast images and images obtained 30, 60, 90, and 240–300 s after intravenous
injection of the 0.1 mM Gd-DTPA/kg solution. We evaluated the thickness, interruption (or not) of the low signal intensity
bands, and enhancement pattern of the cancerous wall and normal gastric wall. We prospectively evaluated the depth of cancer
invasion, perigastric infiltration (extraserosal invasion), perigastric organ invasion, and regional lymph nodes and determined
tumor staging on MR images. These MR evaluations including MR-determined staging were correlated with the surgicopathologic
findings.
Results: Stomach cancer was shown as having a thickened wall with a rapid enhancing pattern after intravenous Gd-DTPA administration.
The mucosa (and/or submucosa) affected by stomach cancer showed an early enhancement pattern (30–90 s after Gd-DTPA administration)
in 43 of 46 patients (93%). The normal gastric mucosa demonstrated a delayed peak enhancement pattern (>90 s after Gd-DTPA
administration) in 29 of 46 patients (63%) and variable enhancement pattern in 17 of 46 patients (37%). An interrupted low
signal intensity band or highly enhanced tumorous lesion penetrating through the gastric wall was seen in 17 of 19 pT3 patients
(90%). Consistency between MR-determined staging and surgicopathologic staging occurred in three of four pT1 tumors (75%),
10 of 13 pT2 tumors (77%), 17 of 19 pT3 tumors (90%), and eight of 10 pT4 tumors (80%); overall accuracy was 83%. Overall
accuracy of regional lymph node involvement, as determined by enhanced MR, was 52%; 24 of 46 node groups were positive.
Conclusions: Dynamic and delayed MR imaging can be useful for predicting depth of cancer invasion, perigastric infiltration (extraserosal
invasion), and perigastric organ invasion by gastric cancer.
Received: 28 July 1998/Revision accepted: 27 January 1999 相似文献
7.
Background: To propose a new method for the ultrasound study of the rectum.
Methods: Twenty-one healthy female patients, 58–72 years old, were examined. To achieve optimal filling and distention of the rectum,
the examination was performed with the patient in the right lateral decubitus position. After placing the probe into the vagina,
1000–1500 mL of water warmed to 35°C was introduced into the rectum through a cannula. After the rectum was completely full,
the cannula was extracted. Images were obtained before and after rectum distention on the transverse plane by using a 5.0-MHz
convex radial endocavitary probe.
Results: Using water eliminated air and fecal artifacts, so rectal wall layers were reliably demonstrated, with the rectal ampulla
well distended. In addition, the rectum in whole circumferential extension and the perirectum fat were clearly visualized.
Conclusion: This new method is useful for study of the rectum.
Received: 13 April 1995/Accepted: 22 May 1995 相似文献
8.
Background: The study is a prospective evaluation of preoperative TNM staging of gastrointestinal tumors by hydrosonography (HUS).
Methods: Sixty patients with suspected gastric or colorectal cancer underwent HUS for TNM staging. All patients were operated on and
the tumors completely removed when possible. HUS findings were correlated with histopathologic staging.
Results: HUS correctly localized tumors in 75% of patients. T stage accuracy was low for gastric cancers (41%). N staging of gastric
cancers was accurate in 68% of all cases and was highly specific (100%). Staging was more accurate for colorectal tumors (70%),
especially with respect to infiltration of other structures (sensitivity 100%, specificity 95%). N staging, however, was not
reliable, mostly owing to impaired examination conditions.
Conclusion: HUS easily misses tumors of the gastric cardia and distal part of the rectum. T staging of colorectal tumors with HUS is
highly accurate, reaching 92% if the tumor is localized. T1 cancers of the stomach tend to be overstaged, and serosal infiltration
by gastric cancers is often misjudged. With the exception of cardial gastric and distal rectal cancers, HUS comes close to
endosonography for staging gastrointestinal tumors. HUS does not require intraluminal access.
Received: 9 May 1995/Accepted after revision: 15 August 1995 相似文献
9.
MR staging of primary colorectal carcinoma: comparison with surgical and histopathologic findings 总被引:2,自引:0,他引:2
Background: We retrospectively evaluated the accuracy of magnetic resonance (MR) imaging in staging colorectal cancer and assessing local tumor extent, nodal involvement, and distant abdominal and pelvic metastases.
Methods: Forty-eight patients with primary colorectal carcinoma were referred for presurgical abdominal and pelvic MR imaging. MR imaging included T1-weighted, fat-suppressed T2-weighted, and fat-suppressed gadolinium-enhanced spin gradient-echo imaging. The prospective interpretations of the MR examinations were reviewed. MR depiction of local tumor extent, nodal involvement, and distant metastases at 18 anatomic locations was noted and compared with subsequent surgical and histopathologic findings.
Results: Overall TNM MR staging agreed with surgical and pathologic staging in 41 (85%) of 48 patients, including 21 (78%) of 27 colon cancers and 20 (95%) of 21 rectal cancers. For depth of tumor penetration, which was evaluable in 44 patients, MR imaging agreed with pathologic results in 38 (86%) of 44 patients, including 22 (88%) of 25 colon cancers and 16 (84%) of 19 rectal cancers. In 42 (95%) of 44 patients, MR images correctly distinguished tumor confined to the bowel wall (T0, T1, and T2) from tumor with transmural tumor extension (T3 and T4). Regional nodal metastases were depicted in 15 of 22 patients (sensitivity, 68%; accuracy, 83%). Nodal metastases were better depicted for rectal cancer in eight of nine patients, compared with colon cancer in seven of 13 patients. Distant metastases were correctly depicted on MR imaging in 13 of 14 patients (sensitivity, 93%; accuracy, 98%). In the site-by-site analysis, MR imaging prospectively depicted 66 of 77 sites of surgically confirmed metastatic tumor in the abdomen and pelvis (sensitivity, 86%; specificity, 99%; accuracy, 98%).
Conclusion: MR imaging using currently available techniques can effectively image local tumor extent and distant metastases in patients with colorectal carcinoma. Especially for colon cancer, incomplete depiction of nodal metastases in normal-size lymph nodes remains a limitation of cross-sectional imaging studies. 相似文献
10.
Background: The purpose of the study was to describe the computed tomographic (CT) findings of the alimentary canal and mesentery in
amyloid infiltration of the gastrointestinal (GI) tract and to correlate the CT findings with histologic extent and distribution
and with amyloid subtype.
Methods: Abdominal CT scans performed between 1988 and 1997 on patients with pathologically proven amyloidosis of the alimentary canal
were reviewed for abnormalities of the alimentary canal and mesentery. Histology was graded for extent of mucosal, submucosal,
and muscularis propria involvement and for degree of interstitial and vascular distribution. CT findings were correlated with
histologic extent, histologic distribution, and amyloid histochemical type.
Results: Twenty-three patients were included. Four (17%) had bowel wall thickening, which was associated with a higher submucosal
extent and interstitial distribution than in patients with normal bowel by CT. Four (17%) patients had bowel wall dilatation
without thickening, which was not associated with statistically significantly different histology than in patients with normal
bowel by CT. There was no statistically significant correlation between CT findings and histochemical subtype. Mesenteric
soft tissue infiltration was seen in two patients, and mesenteric adenopathy was seen in one patient.
Conclusions: Normal bowel is a common abdominal CT finding in amyloidosis of the alimentary canal. When findings are present, GI wall
thickening and/or bowel wall dilatation without wall thickening may be seen. Bowel wall thickening on CT correlates with submucosal
extent and interstitial distribution of disease. Soft tissue infiltration and adenopathy are also occasionally seen.
Received: 15 January 1999/Accepted: 10 March 1999 相似文献
11.
Xanthogranulomatous cholecystitis: a radiological study of 12 cases and a review of the literature 总被引:8,自引:0,他引:8
D. Casas R. Pérez-Andrés J. A. Jiménez A. Mariscal P. Cuadras M. Salas M. C. Gómez-Plaza 《Abdominal imaging》1996,21(5):456-460
Background: Twelve cases of xanthogranulomatous cholecystitis (XGC) are presented, and their radiologic appearance is described.
Methods: Four men and eight women, aged 31–82 years old, with XGC were reviewed. Abdominal ultrasound (US) was performed in all patients.
Computed tomography (CT) was performed in five patients, barium enema examination in two, and percutaneously CT-guided fine-needle
aspirative biopsy of the gallbladder in one.
Results: Barium enema examination showed an indentation of the hepatic flexure. Cholelithiasis was present in all patients, and sludge
was present in six. The gallbladder wall was thickened in all patients, irregular in nine, and could not be properly differentiated
from surrounding liver parenchyma or from other adjacent structures in most patients. A curvilinear halo, hypoechoic on US
and with low attenuation on CT, within the gallbladder wall was found in three patients and pericholecystic fluid in two others.
On CT, the pericholecystic fat had streaky soft tissue densities in three cases. Percutaneously CT-guided fine-needle aspirative
biopsy of the gallbladder was nondiagnostic. The diagnosis of gallbladder carcinoma was considered preoperatively in three
patients.
Conclusion: Despite the characteristic histologic appearance of XCG, radiologic findings are nonspecific, varying from signs observed
in other forms of cholecystitis to the appearance of a gallbladder neoplasm.
Received: 5 April 1995/Accepted: 15 May 1995 相似文献
12.
Preoperative evaluation of Klatskin tumor: accuracy of spiral CT in determining vascular invasion as a sign of unresectability 总被引:6,自引:0,他引:6
Cha JH Han JK Kim TK Kim AY Park SJ Choi BI Suh KS Kim SW Han MC 《Abdominal imaging》2000,25(5):500-507
Background: To assess the accuracy of spiral computed tomography (CT) in predicting the resectability of Klatskin tumor as determined
by vascular invasion.
Methods: Twenty-one consecutive patients with Klatskin tumor who had undergone laparotomy were included in this study. The preoperative
thin-section (5-mm-thick) spiral CT scans of these patients were assessed for the surgical resectability of tumor by evaluating
the vascular invasion. The criterion for vascular invasion indicating unresectability was the tumoral invasion of the proper
hepatic artery or main portal vein or simultaneous invasion of one side of the hepatic artery and the other side of the portal
vein.
Results: All nine patients with tumors thought to be unresectable on the basis of CT findings had tumors that were unresectable at
surgery (positive predictive value, 100%). Of 12 patients with tumors thought to be resectable, six had resectable tumors
(negative predictive value, 50%). Spiral CT failed to detect small hepatic metastasis (n= 1), lymph node metastasis (n= 1), extensive tumor (n= 2) and variation of bile duct (n= 2), which precluded surgical resection.
Conclusion: Spiral CT is a reliable method for detecting vascular invasion and unresectable tumors. However, it has limitations in detecting
variations of the bile duct or the intraductal extent of tumor.
Received: 24 November 1999/Accepted: 26 January 2000 相似文献
13.
Vaginal opacification during defecography: direction of vaginal migration aids in diagnosis of pelvic floor pathology 总被引:1,自引:0,他引:1
Background: To determine whether direction of vaginal displacement during defecography aids in diagnosing pelvic floor pathology.
Methods: Ninety patients underwent defecography over a 2-year period. Each study was retrospectively reviewed by three radiologists
who recorded whether the vagina was displaced cephalad, caudad, or nondisplaced in relation to the urogenital hiatus. This
information was then correlated with radiologic diagnosis rendered for the study.
Results: Of the 26 patients with normal defecograms, 19 (73%; p < 0.001) demonstrated no vaginal displacement during the procedure. Comparatively, 10 (83%; p < 0.001) of the 12 patients with cystoceles showed caudad vaginal displacement, and no patients with cystoceles showed cephalad
displacement of the vagina. Of the 17 patients with rectoceles, 10 (58%) showed cephalad displacement, one (6%) showed caudad
displacement, and six (35%) patients showed no vaginal displacement. Thirteen (46%) of 28 patients with enteroceles showed
cephalad vaginal displacement, nine (32%) showed no vaginal displacement, and six (21%) demonstrated caudad displacement.
Conclusions: Caudad displacement of the opacified vagina suggests the presence of a cystocele. Cephalad vaginal displacement is suggestive
of the presence of an enterocele or rectocele.
Received: 4 December 1998/Revision accepted: 10 March 1999 相似文献
14.
Spiral CT of the abdomen after distention of small bowel loops with transparent enema in patients with Crohn's disease 总被引:8,自引:2,他引:6
G. A. Rollandi P. F. Curone E. Biscaldi F. Nardi E. Bonifacino R. Conzi L. E. Derchi 《Abdominal imaging》1999,24(6):544-549
Background: To evaluate the capability of a computed tomographic (CT) technique that combines distention of the small bowel loops with
a transparent enema with contrast-enhanced spiral CT of the abdomen in patients with Crohn's disease.
Methods: We evaluated the abdomen with spiral CT after distention of the small bowel loops with a transparent enema of methylcellulose
in 40 patients consecutively referred for radiologic evaluation of Crohn's disease of the small bowel. Fluid was infused through
a nasojejunal catheter with a peristaltic pump. Ultrasonography was used to prevent bowel overdistention and detect arrival
of methylcellulose to the cecum. Contrast-enhanced spiral CT of the abdomen was then performed, and the degree of contrast
enhancement and the thickness of the walls of the involved loops were evaluated. A series of 10 patients with retrograde distention
of the last ileal loop from large bowel water enema was used as a control. The results of the CT were compared with those
of conventional radiographic small bowel studies.
Results: The normal small bowel wall was 1.9–2.5 mm thick (mean = 2.1 mm); density values of the normal enhanced wall varied between
25 and 60 HU (mean = 32 HU) and presented a homogeneous structure. Bowel segments involved by the disease were 4–12.5 mm thick
(mean = 9.2 mm), had density values of 75–150 HU (mean = 105 HU), and showed a multilayered appearance. Compared with conventional
radiography, CT detected longer lesions or additional segments involved by the disease process in 14 cases, 11 additional
fistulas, two abscesses, and mesenteric changes in 21 cases.
Conclusions: The small bowel CT enema technique provides good results in the study of patients with Crohn's disease and can be used to
evaluate patients with advanced lesions.
Received: 24 June 1998/Revision accepted: 27 January 1999 相似文献
15.
Abdominal tuberculous lymphadenopathy: MR imaging findings 总被引:7,自引:0,他引:7
Background: The purpose of this study was to evaluate the utility of magnetic resonance imaging (MRI) as a diagnostic tool in abdominal
tuberculous lymphadenopathy.
Methods: MRI studies of 11 patients with histologically proven abdominal tuberculous lymphadenopathy were reviewed with regard to
anatomic distribution, size, shape, degree, and pattern of enhancement and relation of the lesions to adjacent structures.
Results: The most common site of involvement was the periportal area (n= 6), followed by the peripancreatic (n= 5), mesenteric (n= 1), and paraaortic (n= 1) areas. Eight patients were readily diagnosed as having tuberculous lymphadenopathy on abdominal computed tomography.
Three patients had a heterogeneously enhancing masslike lesion adjacent to the pancreas and were initially diagnosed as having
cystic tumor of the pancreas. On MRI, 11 lesions showed T1 iso- or hypointensity and central T2 hyperintensity. Two lesions
showed T1 iso- or hypointensity and central T2 hypointensity. The lesions with different T2 signal intensities showed different
patterns of enhancement on contrast-enhanced dynamic studies. The relations between the enlarged lymph nodes and adjacent
bile ducts or vascular structrues were well depicted on MRI.
Conclusion: MRI was useful in differentiating enlarged lymph nodes abutting the pancreas initially diagnosed as cystic neoplasms on abdominal
computed tomography. RID=" ID=" <E5>Correspondence to:</E5> M.-J. Kim
Received: 9 May 2000/Accepted: 14 June 2000 相似文献
16.
Small hepatocellular carcinoma: differentiation from adenomatous hyperplasia with color Doppler US and dynamic Gd-DTPA-enhanced MR imaging 总被引:4,自引:0,他引:4
Background: To investigate the usefulness of color Doppler ultrasound (US) and dynamic Gd-DTPA-enhanced magnetic resonance (MR) imaging
in the differentiation of small hepatocellular carcinoma (HCC) and adenomatous hyperplasia (AH).
Methods: Thirty-eight small (3 cm or less) nodular lesions (in 38 cirrhotic patients) with US features consistent with HCC underwent
evaluation with color Doppler US and MR imaging. Breath-hold T1-weighted rapid acquisition spin echo MR sequence after bolus
injection of 0.1 mmol/kg gadopentetate dimeglumine was used to evaluate dynamic enhancement. US-guided tissue-core percutaneous
biopsy established the diagnosis: HCC in 28 cases and AH in 10.
Results: Color signals with pulsatile or continuous Doppler spectrum were demonstrated in 19 of 28 HCCs (68%) but in none of the AHs.
Although there was considerable overlap in signal intensity between HCC and AH on both unenhanced T1- and T2-weighted images,
early enhancement on breath-hold T1-weighted images obtained 40 s after starting contrast administration was observed in 22
of 28 HCCs (79%) but in none of the AHs. In 26 of 28 HCCs (93%), pulsatile or continuous flow at color Doppler US, early enhancement
at dynamic MR imaging, or both were observed.
Conclusion: Findings with color Doppler US and dynamic Gd-DTPA-enhanced MR imaging enable a reliable distinction between small HCC and
AH.
Received: 8 August 1994/Accepted after revision: 27 January 1995 相似文献
17.
Endoscopic ultrasound and intraductal ultrasound in the diagnosis of small pancreatic tumors 总被引:6,自引:0,他引:6
Background: The purpose of this study was to assess the diagnostic value of endoscopic ultrasound (EUS) and intraductal ultrasound (IDUS)
in the detection of small pancreatic tumors.
Methods: EUS was performed in 166 patients with verified pancreatic disease. IDUS was performed in 46 patients. A microprobe was introduced
into the main pancreatic duct through the papilla of Vater using the duodenoscope.
Results: EUS was valuable in the detection of small pancreatic tumors. Ductal adenocarcinomas smaller than 1 cm were demonstrated
as a hypoechoic mass with a central irregular hyperechoic area. EUS and IDUS were useful in the characterization of intraductal
paillary tumors (ductectatic mucinous tumors). EUS demonstrated nodular excrescences, and IDUS depicted papillary proliferation
of the duct epithelium, which are characteristic of carcinomas and adenomas but not of hyperplasia. Internal architecture
of cystic neoplasms was clearly depicted by EUS, and differentiation of serous and mucinous tumors was readily achieved. A
tumor as small as a 5-mm islet cell was demonstrated on EUS because islet cell tumors are very hypoechoic.
Conclusion: EUS and IDUS are relatively noninvasive procedures and are useful in the detection of small tumors and differentiation of
pancreatic diseases.
Received: 0/0/0/Accepted: 0/0/0 相似文献
18.
T. Kok P. C. Rijk J. M. Hew A. Martijn H. A. Koetse P. M. J. G. Peeters M. J. H. Slooff C. M. A. Bijleveld 《Abdominal imaging》1996,21(6):495-500
Background: Selective angiography involves increased risk for children and may cause vascular complications. The aim of this study was
to determine whether selective angiography is still necessary for viewing the portal vein and hepatic artery.
Methods: Doppler ultrasound, abdominal aortography, and selective angiography were performed and interpreted independently in 62 children
(median age = 1 year 3 months), with end-stage liver disease, who were candidates for orthotopic liver transplantation.
Results: Selective angiography agreed with the Doppler ultrasound findings of patency, flow direction, and diameter of the extrahepatic
portal vein in 84%, 73%, and 79% of the children, respectively. Important additional information was obtained from selective
angiography in only five of the 62 children (8%). Selective angiography showed an anomaly of the hepatic artery in 21 of the
62 children (33%). In 18 out of these 21 children (85%), an anomaly of the hepatic artery was already visible on the abdominal
aortogram.
Conclusion: Selective angiography did not play any significant role in the detection of an anomaly of the hepatic artery and should only
be done if the Doppler ultrasound findings of the portal vein are inconclusive or if abdominal aortography cannot provide
reliable information about the hepatic artery. For the evaluation of the portal vein and hepatic artery, we recommend Doppler
ultrasound and abdominal aortography, a less invasive angiographic procedure.
Received: 12 May 1995/Accepted: 26 June 1995 相似文献
19.
Background: To describe the use of hepatic cryotherapy to treat patients with symptomatic carcinoid metastates.
Methods: Hepatic cryotherapy was performed on five patients with carcinoid syndrome resulting from metastatic carcinoid tumors. Intraoperative
ultrasound was used to guide the cryotherapy and to assess the adequacy of freezing.
Results: All five patients had relief of the carcinoid syndrome after treatment. In four of the five patients, the relief was prolonged
(>3 months); in one patient, the relief of symptoms was transient (2 months). Four of five patients had a transient reduction
in hormonal tumor markers (the fifth patient did not have hormonal-level follow-up). During a follow-up period of 2.5 years,
four of the five patients died. The 6-month survival rate was 80%, the 1-year survival rate was 60%, the 2-year survival rate
was 40%, and the 2.5-year survival was 20%. One patient is alive 30 months after treatment.
Conclusion: Hepatic cryotherapy can provide symptomatic relief for patients with hepatic metastates producing the carcinoid syndrome.
Received: 1/17/97/Accepted: 2/19/97 相似文献
20.
血清癌胚抗原在直肠癌术前腔内超声分期中的应用价值 总被引:1,自引:1,他引:0
目的 探讨直肠腔内超声(TRUS)对直肠癌术前分期诊断的准确性及腔内超声分期与血清癌胚抗原(CEA)的关系.方法 对52例直肠癌患者行TRUS检查并进行术前分期,同时检测血清CEA水平,并与术后病理分期进行对比.结果 TRUS直肠癌术前分期准确率为76.92%,诊断淋巴结转移的准确率为71.15%.术前CEA水平与直肠癌浸润肠壁深度以及淋巴结转移呈密切相关,应用TRUS检查结合术前血清CEA水平使直肠癌术前分期的准确率达88.46%.结论 TRUS对直肠癌术前分期有着较高的准确性,术前血清CEA水平对直肠癌TRUS分期有着重要的参考价值,TRUS检查结合术前血清CEA水平可提高对直肠癌术前分期的准确率. 相似文献