Intestinal lipomatosis is a rare disease entity. Few cases have been reported in the literature. ... more Intestinal lipomatosis is a rare disease entity. Few cases have been reported in the literature. It is often associated with characteristic CT findings, making a preoperative diagnosis possible. Here we report a 49-year-old male who suffered from progressive abdominal distension, epigastralgia, nausea and vomiting for 2 days. Plain abdominal radiograph showed distended small bowels. Abdominal CT revealed multiple pedunculated submucosal lipomatous tumors in the proximal small bowel and intussusception. Resection of the diseased bowel was performed due to persistent intestinal obstruction. The final diagnosis was intussusception due to polypoid lipomatosis.
Korean journal of radiology : official journal of the Korean Radiological Society
This study was designed to determine if existing methods of grading liver function that have been... more This study was designed to determine if existing methods of grading liver function that have been developed in non-Asian patients with cirrhosis can be used to predict mortality in Asian patients treated for refractory variceal hemorrhage by the use of the transjugular intrahepatic portosystemic shunt (TIPS) procedure. Data for 107 consecutive patients who underwent an emergency TIPS procedure were retrospectively analyzed. Acute physiology and chronic health evaluation (APACHE II), Child-Pugh and model for end-stage liver disease (MELD) scores were calculated. Survival analyses were performed to evaluate the ability of the various models to predict 30-day, 60-day and 360-day mortality. The ability of stratified APACHE II, Child-Pugh, and MELD scores to predict survival was assessed by the use of Kaplan-Meier analysis with the log-rank test. No patient died during the TIPS procedure, but 82 patients died during the follow-up period. Thirty patients died within 30 days after the TIPS...
Acute renal cortical necrosis (ARCN) is a rare cause of acute renal failure characteri zed by nec... more Acute renal cortical necrosis (ARCN) is a rare cause of acute renal failure characteri zed by necrosis of the renal cortex with sparing of the renal medulla. Owing to poor clinical condition during the early period of ARCN in most cases, it does not allow renal biopsy which is a gold stan - dard for diagnosis. Therefore, noninvasive diag -
Objective: To explore the feasibility and efficacy of residual aneurysmal sac (RAS) embolization ... more Objective: To explore the feasibility and efficacy of residual aneurysmal sac (RAS) embolization with the expandable hydrogel embolic device (EHED) in prevention of endoleaks in a surgically created and endoluminally treated abdominal aortic aneurysm (AAA). Methods: In eight dogs, an AAA was created by means of side-to-side anastomosis between the infrarenal abdominal aorta and inferior vena cava (IVC) with ligation of the IVC above and below the anastomotic end, followed by deployment of an endograft with holes. The RAS was then embolized with the EHED. One animal was killed immediately after RAS embolization and one animal died 12 hr after the procedure. Follow-up aortograms were obtained in six animals after 1 day (1 animal), 2 weeks and 6 months (1 animal), and 8 weeks (4 animals). Results: Four animals had no endoleaks on the follow-up aortograms. The remaining two animals with incomplete RAS embolization had moderate type III endoleaks. Type I or II endoleaks were not seen in any animals. Complications included RAS wall penetration by the devices with platinum wires in two animals (nos. 1 and 2), device migration into an aortic circulation through the endograft holes in two animals (nos. 2 and 3) or through distal interstices between the aortic wall and endograft in one animal (no. 8), aortic occlusion in three animals (nos. 3, 7, and 8), and RAS rupture in one animal (no. 7). Histologic examination showed expanded hydrogels occupying the RAS with associated mature or immature organized thrombus, fibrinous thrombus, or degenerate blood cells. Conclusion: RAS embolization was feasible with the EHED, although additional modifications to the device are required to avoid complications. Angiographic and histologic results suggested that RAS embolization with the EHED may help in the prevention of endoleaks.
The purpose of this study was to evaluate the relationship of large diverticulum (>3 cm) and v... more The purpose of this study was to evaluate the relationship of large diverticulum (>3 cm) and volvulus of the small bowel (SB) in adults. A computer search of the medical records between January 1995 and December 2002 revealed 94 surgically proved cases of small bowel volvulus in adults. We reviewed the surgical records and recorded any specific condition found during laparotomy. The control group included 107 consecutive patients receiving a laparotomy with a diagnosis other than SB volvulus. In the 94 surgically proved cases of SB volvulus, the surgical records described presence of adhesion in 47 cases, adhesions around large SB diverticulum (>3 cm) in 5 cases, coexistence of large SB diverticulum and adhesions around the narrowed mesenteric root in 4 cases, large SB diverticulum without a specific description of the presence of adhesion or narrowed mesenteric root in 24 cases, narrowed mesenteric root without large SB diverticulum in 3 cases, internal hernia in 4 cases, tum...
Journal of Vascular and Interventional Radiology, 2010
Between January 2007 and January 2008, a port/catheter system for hepatic arterial infusion chemo... more Between January 2007 and January 2008, a port/catheter system for hepatic arterial infusion chemotherapy was implanted in seven patients with retrograde blood flow in the gastroduodenal artery (GDA). The GDA was not coil-embolized when the catheter tip was positioned in the right gastroepiploic artery. In all cases, implantation of the port/catheter system was successful, and there were no complications. Interventionalists can economize on expensive microcoils by using this simple and time-saving method.
Journal of Vascular and Interventional Radiology, 2008
To compare the stability of epirubicin-iodized oil emulsions prepared with ionic or nonionic cont... more To compare the stability of epirubicin-iodized oil emulsions prepared with ionic or nonionic contrast medium and to compare the efficacy of these emulsions in a prospective, randomized, controlled trial of transarterial chemoembolization (TACE) for hepatocellular carcinoma (HCC). Epirubicin-iodized oil emulsions prepared with ionic and nonionic contrast media was evaluated for stability with light microscopy and magnetic resonance imaging. One hundred ninety-seven patients with inoperable HCC were randomized to receive TACE with epirubicin, prepared either with ionic (control group, n = 99) or nonionic (experimental group, n = 98) contrast medium. Tumor response was graded according to iodized oil retention (grade 1 = >90% retention, grade 2 = 50%-90% retention, and grade 3 = <50% retention), as characterized with computed tomography. Survival probabilities were calculated with the Kaplan-Meier method. The epirubicin-iodized oil emulsions prepared with ionic contrast medium were less stable, exhibiting rapid separation of the oil and aqueous phases, compared with emulsions prepared with nonionic medium. Ninety-one patients in the control group and 87 in the experimental group underwent follow-up CT. Thirty-seven of the 91 patients in the control group (41%) had grade 1 tumors, 41 (45%) had grade 2 tumors, and 13 (14%) had grade 3 tumors. Forty-eight of the 87 patients in the experimental group (55%) had grade 1 tumors, 22 (25%) had grade 2 tumors, and 17 (20%) had grade 3 tumors. The number of patients with grade 1 tumors was significantly higher in the experimental group than in the control group (P = .02); however, there was no difference in patient survival (P = .94). Epirubicin-iodized oil emulsions prepared with nonionic contrast medium are more stable and are associated with lower tumor grade in patients with inoperable HCC. The choice of solvent, however, does not appear to have an effect on patient survival.
Journal of Vascular and Interventional Radiology, 2006
When dealing with small-diameter vessels, interventionalists often experience unsuccessful vascul... more When dealing with small-diameter vessels, interventionalists often experience unsuccessful vascular catheterization attempts with the standard Seldinger technique. To allow smooth intravascular guide-wire passage, the tip of a coaxial puncture needle should be exactly inserted into the vascular lumen, which can be especially difficult when the vascular lumen is small. Therefore, a modification of the standard Seldinger technique is sometimes needed. We describe a modified Seldinger technique in which an angioplasty balloon was used to guide needle puncture and allow smooth intravascular guide-wire access. This technique may be particularly useful for difficult cases requiring catheterization of a small or narrow vessel.
We report a rare case of life-threatening hemorrhage from the inferior epigastric artery that was... more We report a rare case of life-threatening hemorrhage from the inferior epigastric artery that was injured after stoma construction. It was successfully controlled by transcatheter arterial embolization from both the external iliac arterial site and the internal thoracic arterial site.
To characterize imaging findings from computed tomography, magnetic resonance imaging, and angiog... more To characterize imaging findings from computed tomography, magnetic resonance imaging, and angiogram in patients with infected aortic aneurysm. We retrospectively reviewed the records of 21 patients (men, 17; women, 4) with proven infected aortic aneurysms and compared the imaging findings (computed tomography scans, n = 21; magnetic resonance images, n = 2; and angiograms, n = 2). Aneurysms were located in the descending thoracic aorta (n = 10; 47.6%), abdominal aorta (n = 6; 28.6%), aortic arch (n = 3; 14.3%), and thoracoabdominal aorta (n = 2; 9.5%). Aneurysms were saccular in 19 (90%) and fusiform in 2 (10%). Maximal diameters were greater than 10 cm in 2 patients (10%), 5 to 10 cm in 11 (52%), and less than 5 cm in 8 (38%). Average diameters were 6.5 cm in the aortic arch, 5.3 cm in the descending thoracic aorta, and 5.1 cm in the abdominal aorta. Obvious aortic wall calcification occurred in 19 patients (90%). Other features included disrupted calcification (n = 15; 71%), prominent and irregular wall thickening (n = 17; 81%), periaortic soft tissue mass (n = 15; 71%), rim enhancement (n = 18; 86%), periaortic gas (n = 7; 33%), periaortic stranding and fluid retention (n = 14; 67%), periaortic hematoma (n = 3; 14%), adjacent bone destruction (n = 1; 5%), pleural effusion (n = 12; 57%), and associated dissecting aneurysm (n = 2; 10%). Saccular aneurysms, adjacent soft tissue masses, rim enhancement, stranding, fluid, gas, and unusual adjacent bony destruction highly suggest infected aneurysm.
We report a rare case, in which, an interrupted inferior vena cava with anomalous transhepatic co... more We report a rare case, in which, an interrupted inferior vena cava with anomalous transhepatic continuations is noticed in a variant of scimitar syndrome. The scimitar variant consisting of dextrocardia, hypoplastic right lung and a non-systemically drained meandering right pulmonary vein, which presents the "scimitar sign" on chest radiograph. To our knowledge, such a combination of cardiac and venous anomalies has not been described before.
Purpose: To evaluate the complication rates and diagnostic accuracy of two different CT-guided tr... more Purpose: To evaluate the complication rates and diagnostic accuracy of two different CT-guided transthoracic cutting needle biopsy techniques: coaxial method and single needle method. Methods: This study involved 198 consecutive subjects with 198 intrathoracic lesions. The first 98 consecutive subjects received a single needle cutting technique and the next 100 consecutive subjects received a coaxial technique. Both groups were compared in relation the diagnostic accuracy and complication rates. Results: No significant difference was found between the two groups concerning patient characteristics, lesions and procedure variables. There was a borderline statistical difference in the incidence of pneumothorax at within 24-h post biopsy between patients in the single needle group (5%) and the coaxial group (13%) (P = 0.053). Little difference was found in the pneumothorax rate at immediately post biopsy between the two groups, which was 28% in the single needle group and 31% in the coaxial group. There was no significant difference in the hemoptysis rate between the two groups, which was 9.2% in the single needle group and 11% in the coaxial group. Both techniques yielded an overall diagnostic accuracy of 98% for malignant lesions with similar sensitivity (single needle: 96.9% vs. coaxial: 96.4%) and specificity (single needle: 100% vs. coaxial: 100%). Conclusion: There is little difference in the pneumothorax rates and bleeding complications between patients who either received a single needle or a coaxial transthoracic cutting biopsy. Both techniques produce an overall diagnostic accuracy of 98% for malignant lesions.
The accuracy of computed tomography (CT) in detecting local invasion (T status) and nodal metasta... more The accuracy of computed tomography (CT) in detecting local invasion (T status) and nodal metastasis (N status) of colon cancer was determined. Data on the preoperative CT scan of 153 lesions from 152 patients with colon cancer were reviewed retrospectively. Evaluation included the T stage and N stage of the TNM system. The results were compared with those obtained by histopathological examination of the resected tumour. Of the 153 tumours, 117 (76.5%) were correctly classified as Stage T1 and T2 (33 tumours) and Stage T3 and T4 (84 tumours) by CT. The sensitivity and specificity were 70.2% and 79.2%, respectively, and the positive and negative predictive values were 85.7% and 60.0%. When analysed according to the individual T stage (Tx/Tis, T1, 2, 3, 4) and N stage (N0, 1, 2), the kappa coefficient with linear weighting was 0.208 (fair agreement) for T stage and 0.154 (slight agreement) for N stage. The estimation of tumour size showed good agreement with histopathology (Spearman correlation coefficient 0.865). CT scanning of colonic cancer showed 75% accuracy in identifying T1 and T2 cancers combined, but gave poor agreement between CT and histopathology for individual T stages.
Radiologists and urologists require practical and helpful image reconstructions for diagnosing ur... more Radiologists and urologists require practical and helpful image reconstructions for diagnosing urinary obstruction. We performed different types of imaging and reconstruction, then used a self-designed urinary obstruction-specific questionnaire to evaluate the diagnostic outcome of them. Our results suggested that two-dimensional (2D) axial computed tomography (CT) is clinically superior to retrograde pyelography or antegrade pyelography, and to other modes of image reconstruction that are often used for diagnosing urinary obstruction.
Intestinal lipomatosis is a rare disease entity. Few cases have been reported in the literature. ... more Intestinal lipomatosis is a rare disease entity. Few cases have been reported in the literature. It is often associated with characteristic CT findings, making a preoperative diagnosis possible. Here we report a 49-year-old male who suffered from progressive abdominal distension, epigastralgia, nausea and vomiting for 2 days. Plain abdominal radiograph showed distended small bowels. Abdominal CT revealed multiple pedunculated submucosal lipomatous tumors in the proximal small bowel and intussusception. Resection of the diseased bowel was performed due to persistent intestinal obstruction. The final diagnosis was intussusception due to polypoid lipomatosis.
Korean journal of radiology : official journal of the Korean Radiological Society
This study was designed to determine if existing methods of grading liver function that have been... more This study was designed to determine if existing methods of grading liver function that have been developed in non-Asian patients with cirrhosis can be used to predict mortality in Asian patients treated for refractory variceal hemorrhage by the use of the transjugular intrahepatic portosystemic shunt (TIPS) procedure. Data for 107 consecutive patients who underwent an emergency TIPS procedure were retrospectively analyzed. Acute physiology and chronic health evaluation (APACHE II), Child-Pugh and model for end-stage liver disease (MELD) scores were calculated. Survival analyses were performed to evaluate the ability of the various models to predict 30-day, 60-day and 360-day mortality. The ability of stratified APACHE II, Child-Pugh, and MELD scores to predict survival was assessed by the use of Kaplan-Meier analysis with the log-rank test. No patient died during the TIPS procedure, but 82 patients died during the follow-up period. Thirty patients died within 30 days after the TIPS...
Acute renal cortical necrosis (ARCN) is a rare cause of acute renal failure characteri zed by nec... more Acute renal cortical necrosis (ARCN) is a rare cause of acute renal failure characteri zed by necrosis of the renal cortex with sparing of the renal medulla. Owing to poor clinical condition during the early period of ARCN in most cases, it does not allow renal biopsy which is a gold stan - dard for diagnosis. Therefore, noninvasive diag -
Objective: To explore the feasibility and efficacy of residual aneurysmal sac (RAS) embolization ... more Objective: To explore the feasibility and efficacy of residual aneurysmal sac (RAS) embolization with the expandable hydrogel embolic device (EHED) in prevention of endoleaks in a surgically created and endoluminally treated abdominal aortic aneurysm (AAA). Methods: In eight dogs, an AAA was created by means of side-to-side anastomosis between the infrarenal abdominal aorta and inferior vena cava (IVC) with ligation of the IVC above and below the anastomotic end, followed by deployment of an endograft with holes. The RAS was then embolized with the EHED. One animal was killed immediately after RAS embolization and one animal died 12 hr after the procedure. Follow-up aortograms were obtained in six animals after 1 day (1 animal), 2 weeks and 6 months (1 animal), and 8 weeks (4 animals). Results: Four animals had no endoleaks on the follow-up aortograms. The remaining two animals with incomplete RAS embolization had moderate type III endoleaks. Type I or II endoleaks were not seen in any animals. Complications included RAS wall penetration by the devices with platinum wires in two animals (nos. 1 and 2), device migration into an aortic circulation through the endograft holes in two animals (nos. 2 and 3) or through distal interstices between the aortic wall and endograft in one animal (no. 8), aortic occlusion in three animals (nos. 3, 7, and 8), and RAS rupture in one animal (no. 7). Histologic examination showed expanded hydrogels occupying the RAS with associated mature or immature organized thrombus, fibrinous thrombus, or degenerate blood cells. Conclusion: RAS embolization was feasible with the EHED, although additional modifications to the device are required to avoid complications. Angiographic and histologic results suggested that RAS embolization with the EHED may help in the prevention of endoleaks.
The purpose of this study was to evaluate the relationship of large diverticulum (>3 cm) and v... more The purpose of this study was to evaluate the relationship of large diverticulum (>3 cm) and volvulus of the small bowel (SB) in adults. A computer search of the medical records between January 1995 and December 2002 revealed 94 surgically proved cases of small bowel volvulus in adults. We reviewed the surgical records and recorded any specific condition found during laparotomy. The control group included 107 consecutive patients receiving a laparotomy with a diagnosis other than SB volvulus. In the 94 surgically proved cases of SB volvulus, the surgical records described presence of adhesion in 47 cases, adhesions around large SB diverticulum (>3 cm) in 5 cases, coexistence of large SB diverticulum and adhesions around the narrowed mesenteric root in 4 cases, large SB diverticulum without a specific description of the presence of adhesion or narrowed mesenteric root in 24 cases, narrowed mesenteric root without large SB diverticulum in 3 cases, internal hernia in 4 cases, tum...
Journal of Vascular and Interventional Radiology, 2010
Between January 2007 and January 2008, a port/catheter system for hepatic arterial infusion chemo... more Between January 2007 and January 2008, a port/catheter system for hepatic arterial infusion chemotherapy was implanted in seven patients with retrograde blood flow in the gastroduodenal artery (GDA). The GDA was not coil-embolized when the catheter tip was positioned in the right gastroepiploic artery. In all cases, implantation of the port/catheter system was successful, and there were no complications. Interventionalists can economize on expensive microcoils by using this simple and time-saving method.
Journal of Vascular and Interventional Radiology, 2008
To compare the stability of epirubicin-iodized oil emulsions prepared with ionic or nonionic cont... more To compare the stability of epirubicin-iodized oil emulsions prepared with ionic or nonionic contrast medium and to compare the efficacy of these emulsions in a prospective, randomized, controlled trial of transarterial chemoembolization (TACE) for hepatocellular carcinoma (HCC). Epirubicin-iodized oil emulsions prepared with ionic and nonionic contrast media was evaluated for stability with light microscopy and magnetic resonance imaging. One hundred ninety-seven patients with inoperable HCC were randomized to receive TACE with epirubicin, prepared either with ionic (control group, n = 99) or nonionic (experimental group, n = 98) contrast medium. Tumor response was graded according to iodized oil retention (grade 1 = >90% retention, grade 2 = 50%-90% retention, and grade 3 = <50% retention), as characterized with computed tomography. Survival probabilities were calculated with the Kaplan-Meier method. The epirubicin-iodized oil emulsions prepared with ionic contrast medium were less stable, exhibiting rapid separation of the oil and aqueous phases, compared with emulsions prepared with nonionic medium. Ninety-one patients in the control group and 87 in the experimental group underwent follow-up CT. Thirty-seven of the 91 patients in the control group (41%) had grade 1 tumors, 41 (45%) had grade 2 tumors, and 13 (14%) had grade 3 tumors. Forty-eight of the 87 patients in the experimental group (55%) had grade 1 tumors, 22 (25%) had grade 2 tumors, and 17 (20%) had grade 3 tumors. The number of patients with grade 1 tumors was significantly higher in the experimental group than in the control group (P = .02); however, there was no difference in patient survival (P = .94). Epirubicin-iodized oil emulsions prepared with nonionic contrast medium are more stable and are associated with lower tumor grade in patients with inoperable HCC. The choice of solvent, however, does not appear to have an effect on patient survival.
Journal of Vascular and Interventional Radiology, 2006
When dealing with small-diameter vessels, interventionalists often experience unsuccessful vascul... more When dealing with small-diameter vessels, interventionalists often experience unsuccessful vascular catheterization attempts with the standard Seldinger technique. To allow smooth intravascular guide-wire passage, the tip of a coaxial puncture needle should be exactly inserted into the vascular lumen, which can be especially difficult when the vascular lumen is small. Therefore, a modification of the standard Seldinger technique is sometimes needed. We describe a modified Seldinger technique in which an angioplasty balloon was used to guide needle puncture and allow smooth intravascular guide-wire access. This technique may be particularly useful for difficult cases requiring catheterization of a small or narrow vessel.
We report a rare case of life-threatening hemorrhage from the inferior epigastric artery that was... more We report a rare case of life-threatening hemorrhage from the inferior epigastric artery that was injured after stoma construction. It was successfully controlled by transcatheter arterial embolization from both the external iliac arterial site and the internal thoracic arterial site.
To characterize imaging findings from computed tomography, magnetic resonance imaging, and angiog... more To characterize imaging findings from computed tomography, magnetic resonance imaging, and angiogram in patients with infected aortic aneurysm. We retrospectively reviewed the records of 21 patients (men, 17; women, 4) with proven infected aortic aneurysms and compared the imaging findings (computed tomography scans, n = 21; magnetic resonance images, n = 2; and angiograms, n = 2). Aneurysms were located in the descending thoracic aorta (n = 10; 47.6%), abdominal aorta (n = 6; 28.6%), aortic arch (n = 3; 14.3%), and thoracoabdominal aorta (n = 2; 9.5%). Aneurysms were saccular in 19 (90%) and fusiform in 2 (10%). Maximal diameters were greater than 10 cm in 2 patients (10%), 5 to 10 cm in 11 (52%), and less than 5 cm in 8 (38%). Average diameters were 6.5 cm in the aortic arch, 5.3 cm in the descending thoracic aorta, and 5.1 cm in the abdominal aorta. Obvious aortic wall calcification occurred in 19 patients (90%). Other features included disrupted calcification (n = 15; 71%), prominent and irregular wall thickening (n = 17; 81%), periaortic soft tissue mass (n = 15; 71%), rim enhancement (n = 18; 86%), periaortic gas (n = 7; 33%), periaortic stranding and fluid retention (n = 14; 67%), periaortic hematoma (n = 3; 14%), adjacent bone destruction (n = 1; 5%), pleural effusion (n = 12; 57%), and associated dissecting aneurysm (n = 2; 10%). Saccular aneurysms, adjacent soft tissue masses, rim enhancement, stranding, fluid, gas, and unusual adjacent bony destruction highly suggest infected aneurysm.
We report a rare case, in which, an interrupted inferior vena cava with anomalous transhepatic co... more We report a rare case, in which, an interrupted inferior vena cava with anomalous transhepatic continuations is noticed in a variant of scimitar syndrome. The scimitar variant consisting of dextrocardia, hypoplastic right lung and a non-systemically drained meandering right pulmonary vein, which presents the "scimitar sign" on chest radiograph. To our knowledge, such a combination of cardiac and venous anomalies has not been described before.
Purpose: To evaluate the complication rates and diagnostic accuracy of two different CT-guided tr... more Purpose: To evaluate the complication rates and diagnostic accuracy of two different CT-guided transthoracic cutting needle biopsy techniques: coaxial method and single needle method. Methods: This study involved 198 consecutive subjects with 198 intrathoracic lesions. The first 98 consecutive subjects received a single needle cutting technique and the next 100 consecutive subjects received a coaxial technique. Both groups were compared in relation the diagnostic accuracy and complication rates. Results: No significant difference was found between the two groups concerning patient characteristics, lesions and procedure variables. There was a borderline statistical difference in the incidence of pneumothorax at within 24-h post biopsy between patients in the single needle group (5%) and the coaxial group (13%) (P = 0.053). Little difference was found in the pneumothorax rate at immediately post biopsy between the two groups, which was 28% in the single needle group and 31% in the coaxial group. There was no significant difference in the hemoptysis rate between the two groups, which was 9.2% in the single needle group and 11% in the coaxial group. Both techniques yielded an overall diagnostic accuracy of 98% for malignant lesions with similar sensitivity (single needle: 96.9% vs. coaxial: 96.4%) and specificity (single needle: 100% vs. coaxial: 100%). Conclusion: There is little difference in the pneumothorax rates and bleeding complications between patients who either received a single needle or a coaxial transthoracic cutting biopsy. Both techniques produce an overall diagnostic accuracy of 98% for malignant lesions.
The accuracy of computed tomography (CT) in detecting local invasion (T status) and nodal metasta... more The accuracy of computed tomography (CT) in detecting local invasion (T status) and nodal metastasis (N status) of colon cancer was determined. Data on the preoperative CT scan of 153 lesions from 152 patients with colon cancer were reviewed retrospectively. Evaluation included the T stage and N stage of the TNM system. The results were compared with those obtained by histopathological examination of the resected tumour. Of the 153 tumours, 117 (76.5%) were correctly classified as Stage T1 and T2 (33 tumours) and Stage T3 and T4 (84 tumours) by CT. The sensitivity and specificity were 70.2% and 79.2%, respectively, and the positive and negative predictive values were 85.7% and 60.0%. When analysed according to the individual T stage (Tx/Tis, T1, 2, 3, 4) and N stage (N0, 1, 2), the kappa coefficient with linear weighting was 0.208 (fair agreement) for T stage and 0.154 (slight agreement) for N stage. The estimation of tumour size showed good agreement with histopathology (Spearman correlation coefficient 0.865). CT scanning of colonic cancer showed 75% accuracy in identifying T1 and T2 cancers combined, but gave poor agreement between CT and histopathology for individual T stages.
Radiologists and urologists require practical and helpful image reconstructions for diagnosing ur... more Radiologists and urologists require practical and helpful image reconstructions for diagnosing urinary obstruction. We performed different types of imaging and reconstruction, then used a self-designed urinary obstruction-specific questionnaire to evaluate the diagnostic outcome of them. Our results suggested that two-dimensional (2D) axial computed tomography (CT) is clinically superior to retrograde pyelography or antegrade pyelography, and to other modes of image reconstruction that are often used for diagnosing urinary obstruction.
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Papers by Reng-hong Wu