Eplerenone improves hyperglycemia and sympathetic excitation in chronic renocardiac syndrome in rats.

We aimed to assess the efficacy of eplerenone, a steroidal mineralocorticoid receptor antagonist known to reduce blood pressure and mitigate cardiovascular disease (CVD) progression, in retarding the progression of chronic kidney disease (CKD) and CVD in a rat model of type 4 cardiorenal syndrome (CRS). We grouped rats into four experimental categories: sham surgery, sham treatment with eplerenone, nephrectomy without eplerenone (Nx), and nephrectomy with eplerenone (Nx + EP). For the Nx + EP group, rats received five-sixths nephrectomy, inducing CKD and CVD conditions such as renal hypertension and hyperglycemia, and were then treated with eplerenone (100 mg/kg/day, orally) over 4 weeks after an initial 4-week observation period. Heart rate, blood pressure, blood sugar levels, and sympathetic nerve excitation were monitored biweekly. In addition, assessments of renal and cardiac tissues, including evaluation of renal tubulointerstitial injury, glomerular injury, and cardiomyocyte hypertrophy, were conducted at week 8. Eplerenone administration mitigated CKD and CVD progression in the Nx + EP group, evident by improved blood pressure (217.3 ± 5.4 versus 175.3 ± 5.6), blood sugar (121.8 ± 1.3 versus 145.6 ± 6.0) level, reduced sympathetic nerve excitation, and cardiomyocyte hypertrophy compared to the Nx group. However, renal tubulointerstitial injury, glomerular injury, and cardiovascular dysfunction, which were increased in rats with type 4 CRS, did not show significant changes with eplerenone treatment. Our study demonstrated that eplerenone treatment did not exacerbate type 4 CRS but improved blood pressure, blood sugar levels, sympathetic nerve excitation, and cardiomyocyte hypertrophy in this model.

Paricalcitol improved cardiac hypertrophy and fibrosis through upregulation of fibroblast growth factor-23 and downregulation of transforming growth factor-beta in a rat model of isoproterenol-induced cardiomyopathy.

Acute cardiomyopathy is a significant global health concern and one of the leading causes of death in developed countries. Prior studies have shown an association between acute cardiomyopathy and low vitamin D levels. Although paricalcitol, a vitamin D receptor (VDR) activator, has demonstrated clinical benefits in patients with advanced kidney disease, its effect on cardiac remodeling in cardiomyopathy is unknown. This study aimed to investigate the relative effects of paricalcitol on cardiomyopathy in rats. Wistar-Kyoto rats were administered vehicle (sham control group) or isoproterenol to induce cardiomyopathy. Rats administered isoproterenol were subsequently treated with paricalcitol (experimental group) or vehicle (isoproterenol group). Picrosirius red and immunofluorescence staining were used to analyze cardiac fibrosis and hypertrophy. Immunohistochemistry staining was used to confirm the molecular mechanisms involved in isoproterenol-induced cardiomyopathy in rats. Injection of paricalcitol could reduce collagen and transforming growth factor-beta 1 (TGF-ß1) levels while activating fibroblast growth factor receptor 1 (FGFR1) and fibroblast growth factor-23 (FGF23) without the help of Klotho, thereby reducing myocardial hypertrophy and fibrosis. As a VDR activator, paricalcitol reduces isoproterenol-induced cardiac fibrosis and hypertrophy by reducing the expression of TGF-ß1 and enhancing the expression of VDR, FGFR1, and FGF23.

Prazosin improves neurogenic acute heart failure through downregulation of fibroblast growth factor 23 in rat hearts.

Bilateral nucleus tractus solitarii (NTS) lesions, possibly caused by enterovirus 71 infection, cause severe neurogenic hypertension, leading to acute heart failure (HF), pulmonary edema, and death within hours. Alpha-adrenergic blockers attenuate blood pressure and ameliorate HF and pulmonary edema, thereby prolonging survival time. However, the molecular mechanisms of these blockers are not clear. In this study, we investigated these mechanisms in a rat model of 6-hydroxydopamine (6-OHDA)-induced HF. Sprague-Dawley rats were treated with prazosin 10 min after the microinjection of 6-OHDA into the NTS. Immunohistochemistry and dihydroethidium (DHE) staining were used for analysis. In the cardiac tissue of 6-OHDA-induced HF, in situ expression of tumor necrosis factor-alpha (TNF-α), fibroblast growth factor-23 (FGF23), and FGF receptor 1 (FGFR1) increased, but in situ expression of Vitamin D receptor (VDR) decreased. DHE staining revealed several heart cells with high reactive oxygen species production. Prazosin treatment decreased TNF-α, FGF23, and FGFR1 expression in the heart of rats with 6-OHDA-induced HF. It also prevented cardiomyopathy caused by 6-OHDA-induced bilateral NTS lesions by inhibiting the FGF23-FGFR1 pathway and downregulating TNF-α expression. In situ, FGF23, FGFR1, VDR, superoxide, and TNF-α in the heart were found to be involved in acute HF in our rat model of 6-OHDA-induced bilateral NTS lesions. These findings are potentially useful for treating fatal enterovirus 71 infection-induced NTS lesions and HF.

Performance of the EuroSCORE II Model in Predicting Short-Term Mortality of General Cardiac Surgery: A Single-Center Study in Taiwan.

Background: The latest European System for Cardiac Operative Risk Evaluation (EuroSCORE) II is a well-accepted risk evaluation system for mortality in cardiac surgery in Europe. Objectives: To determine the performance of this new model in Taiwanese patients. Methods: Between January 2012 and December 2014, 657 patients underwent cardiac surgery at our institution. The EuroSCORE II scores of all patients were determined preoperatively. The short-term surgical outcomes of 30-day and in-hospital mortality were evaluated to assess the performance of the EuroSCORE II. Results: Of the 657 patients [192 women (29.22%); age 63.5 ± 12.68 years], the 30-day mortality rate was 5.48%, and the in-hospital mortality rate was 9.28%. The discrimination power of this new model was good in all populations, regardless of 30-day mortality or in-hospital mortality. Good accuracy was also noted in different procedures related to coronary artery bypass grafting, and good calibration was noted for cardiac procedures (p value > 0.05). When predicting surgical death within 30 days, the EuroSCORE II overestimated the risk (observed to expected: 0.79), but in-hospital mortality was underestimated (observed to expected: 1.33). The predictive ability [area under the curve (AUC) of the receiver operating characteristic (ROC) curve] and calibration of the EuroSCORE II for 30-day mortality (0.792) and in-hospital mortality (0.825) suggested that in-hospital mortality is a better endpoint for the EuroSCORE II. Conclusions: The new EuroSCORE II model performed well in predicting short-term outcomes among patients undergoing general cardiac surgeries. For short-term outcomes, in-hospital mortality was better than 30-day mortality as an indicator of surgical results, suggesting that it may be a better endpoint for the EuroSCORE II.

It is Time to Replace Large Drains with Small Ones After Fixation of Rib Fractures: A Prospective Observational Study.

INTRODUCTION: Large-bore chest tubes are usually applied after thoracic surgery. Recently, small-bore tubes have been increasingly considered owing to the extensive use of video-assisted thoracoscopic surgery (VATS). This study assessed the differences in outcomes between large-bore and small-caliber drainage tubes in patients undergoing surgical stabilization of rib fractures (SSRF) with VATS. METHODS: Overall, 131 patients undergoing SSRF with VATS were prospectively enrolled, including 65 patients receiving 32-Fr chest tubes (group 1) and 66 patients receiving 14-Fr pigtail catheters (group 2) for postoperative drainage. The clinical characteristics and perioperative outcomes of the patients were compared. RESULTS: All patients underwent SSRF with VATS within 4 days after trauma. After the operation, the mean duration of chest tubes was longer than that of pigtail catheters, with statistical significance (5.08 ± 2.47 vs 3.11 ± 1.31, P = 0.001). Length of stay (LOS) was also longer in group 1 (10.38 ± 2.90 vs 8.18 ± 2.44, P = 0.001). After multivariate logistic regression, the only independent factors between the two groups were duration of postoperative drainage (adjusted odds ratio [AOR] 1.746; 95% confidence interval [CI] 0.171-10.583, P = 0.001) and hospital LOS (AOR 1.272; 95% CI 0.109-4.888, P = 0.027). CONCLUSION: After reconstruction of the chest wall and lung parenchyma, small-caliber drainage catheters could be easily and safely applied to reduce hospital LOS.

Comparable long-term results of the extracardiac conduit total cavopulmonary connection in heterotaxy to non-heterotaxy patients.

BACKGROUND: Fontan operation in heterotaxy patients has been associated with high mortality. We studied whether adoption of the extracardiac conduit (EC) total cavopulmonary connection (TCPC) in heterotaxy demonstrated comparable results to non-heterotaxy population. METHODS: A retrospective medical record review of 35 consecutive patients with heterotaxy and 70 consecutive patients without heterotaxy syndrome who underwent EC TCPC between 2000 and 2018 was performed. RESULTS: In the 35 heterotaxy patients, 30 were right and 5 were left atrial isomerism. Anomalies of venous return included bilateral superior vena cava in 20 (57.1%), separated hepatic vein in 8 (22.9%), interrupted inferior vena cava in 3 (8.6%), total anomalous pulmonary venous return in 7 (20%), and partial in 2 patients (5.7%). All patients underwent EC TCPC under beating-heart cardiopulmonary bypass except in four patients (11.4%) cardioplegic arrest was needed for cardiac repair. The surgical mortality rate was lower in heterotaxy patients (0% vs. 5.7%; p = 0.299) but statistically not significant. The follow-up ranged from 2 months to 17.8 years (mean 9.4 ± 5.6 years). At 15 years, there was no significant difference between the heterotaxy and non-heterotaxy patients regarding the long-term survival (70% vs. 78.6%; p = 0.443), freedom from reoperation (81.9% vs. 96.5%; p = 0.057), and postoperative arrhythmia (17.1% vs. 7.1%; p = 0.174). CONCLUSIONS: EC TCPC can be performed in heterotaxy patients with comparable early and late results to the non-heterotaxy population. However, the late morbidities regarding the Fontan circulation needs careful follow-up.

Glut5 Knockdown in the Nucleus Tractus Solitarii Alleviates Fructose-Induced Hypertension in Rats.

BACKGROUND: Several studies have suggested mechanisms whereby excessive fructose intake increases blood pressure (BP). Glucose transporter 5 (GLUT5) is a fructose transporter expressed on enterocytes, and its involvement in the nucleus tractus solitarius (NTS)-modulated increase in BP following fructose intake remains unclear. OBJECTIVES: Herein, we investigated whether NTS Glut5 knockdown (KD) can alleviate fructose-induced hypertension in rat models. METHODS: Male Wistar-Kyoto rats (6-8 weeks old; average weight: 230 g) were randomly assigned into 4 groups [control (Con), fructose (Fru), fructose + scrambled (Fru + S), and Fru +  KD]. The Con group rats had ad libitum access to regular water, and the other 3 groups were provided 10% fructose water ad libitum for 4 weeks (2 weeks before lentiviral transfection in the Fru + S and Fru + KD groups). Glut5 short hairpin RNA was delivered into the NTS of rats using a lentivirus system. Fructose-induced hypertension was assessed via the tail-cuff technique, a noninvasive blood pressure measurement approach. GLUT5-associated and other insulin signaling pathways in the NTS of rats were assessed using immunofluorescence and immunoblotting analyses. We evaluated between-group differences using the Mann-Whitney U test or Kruskal-Wallis 1-way ANOVA. RESULTS: Compared with the Fru + S group, the Fru + KD group had reduced sympathetic nerve hyperactivity (48.8 ± 3.2 bursts/min; P < 0.05), improved central insulin signaling, upregulated protein kinase B (AKT; 3.0-fold) and neuronal NO synthase (nNOS; 2.78-fold) expression, and lowered BP (17 ± 1 mmHg, P < 0.05). Moreover, Glut5 KD restored signaling dependent on adenosine 5'-monophosphate-activated protein kinase and reduced fructose-induced oxidative stress 2.0-fold, and thus decreased NAD(P)H oxidase in p67-phox 1.9-fold within the NTS. CONCLUSIONS: Fructose-induced reactive oxygen species generates in the NTS of rats through GLUT5 and receptor for advanced glycation end products signaling, thus impairing the AKT-nNOS-NO signaling pathway and ultimately causing hypertension.

Endovascular management of aorto-iliac occlusive disease (Leriche syndrome).

BACKGROUND: Bypass grafting is the standard of care for chronic aorto-iliac occlusive disease (AIOD, aka Leriche Syndrome) but is associated with mortality rates of up to 25% if surgical re-intervention is necessary. Despite a recent shift towards an endovascular-first strategy for TransAtlantic InterSociety Consensus II ("TASC II") C and D lesions, reports from Leriche Syndrome are still limited. PATIENTS AND METHODS: 15 high-risk patients (11 male, 4 female), mean age of 60.6 years, with chronic aorto-iliac occlusive disease were retrospectively reviewed. Retrograde approaches via the bilateral femoral arteries for aortic occlusion less than 4 cm in length and/or antegrade fashion from the brachial artery for juxtarenal type lesions were made. For the latter, thrombolysis prior to angioplasty was also performed. Intraluminal or if necessary, subintimal angioplasty was performed with deployment of either bare metal stents or stentgrafts in a kissing-stent fashion. RESULTS: A total of 28 iliac arteries and 14 occluded abdominal aorta were treated with 100% technical success, of which 25% success were achieved by using subintimal technique. Two minor complications occurred, including vascular rupture and distal emboli in one patient apiece, which were successfully managed via endovascular fashion. There were no complications of renal artery emboli. Primary and secondary patency rates at 1, 3 and 5 years were 92.3% and 100%; 83.9% and 100%; and 83.9% and 100%, respectively. CONCLUSION: Endovascular therapy for chronic aorto-iliac occlusion has a high technical success rate, with good short- and mid-term primary and secondary patency rates and may provide a valid alternative to surgery for high-risk patients.

Outcome of Robot-Assisted Bilateral Internal Mammary Artery Grafting via Left Pleura in Coronary Bypass Surgery.

Studies are extremely limited for the investigation of the clinical outcome of da Vinci robot-assisted bilateral internal mammary artery (BIMA) grafting in coronary artery bypass grafting (CABG) surgery. This study aimed to explore the short-term outcome of da Vinci robot-assisted BIMA grafting through the left pleural space. Relevant data were collected from patients with multi-vessel coronary artery disease receiving two kinds of CABG: a group of patients receiving da Vinci robot-assisted CABG with BIMA grafting, and another group of patients receiving sternotomy CABG with BIMA grafting. Primary endpoints, which included cardiovascular and renal endpoints, were analyzed between the groups using the chi-square test, analysis of variance test, and Kaplan-Meier analysis. Compared with the conventional group (n = 22), the robotic group (n = 22) had a significantly longer operation time (12.7 ± 1.7 vs. 8.5 ± 1.5 hours; p < 0.01) and a marginally lower mean of serum creatinine at baseline (1.2 ± 0.3 vs. 2.0 ± 1.7 mg/dL; p = 0.04). Primary endpoints (5, 22.7% vs. 12, 54.5%; p = 0.03) and renal endpoints (1, 4.5% vs. 7, 31.8%; p = 0.02) at six months were significantly reduced in the robotic group compared with the conventional group. There were no differences in cardiovascular endpoints at six months between the groups (1, 4.5% vs. 0; p = 1.00). The data showed that da Vinci robot-assisted BIMA grafting was safe, with equal cardiovascular events and lowered renal events at six months, as compared to conventional sternotomy BIMA grafting, despite the longer procedure time. The short-term study suggests that da Vinci robot-assisted BIMA grafting may be considered a favorable surgical option for patients with severe coronary artery disease.

The use of a Colapinto TIPS Needle under cone-beam computed tomography guidance for true lumen re-entry in subintimal recanalization of chronic iliac artery occlusion.

BACKGROUND: To report the technique and clinical outcome of subintimal re-entry in chronic iliac artery occlusion by using a Colapinto transjugular intrahepatic portosystemic shunt (TIPS) needle under rotational angiography (cone-beam computed tomography; CT) imaging guidance. METHODS: Patients with chronic iliac artery occlusion with earlier failed attempts at conventional percutaneous recanalization during the past 5 years were enrolled in our study. In these patients, an ipsilateral femoral access route was routinely utilized in a retrograde fashion. A Colapinto TIPS Needle was used to aid the true lumen re-entry after failed conventional intraluminal or subintimal guidewire and catheter-based techniques. The puncture was directed under rotational angiography cone-beam CT guidance to re-enter the abdominal aorta. Bare metallic stents 8-10 mm in diameter were deployed in the common iliac artery, and followed by balloon dilation. RESULTS: Ten patients (9 male; median age, 75 years) were included in our investigation. The average occlusion length was 10.2 cm (range, 4-15 cm). According to the Trans-Atlantic Inter-Society Consensus (TASC) II classification, there were five patients each with Class B and D lesions. Successful re-entry was achieved in all patients without procedure-related complications. The ankle-brachial index (ABI) values increased from 0.38-0.79 to 0.75-1.28 after the procedure. Imaging follow-up (> 6 months) was available in six patients with patency of all stented iliac artery. Thereafter, no complaints of recurrent clinical symptoms occurred during the follow-up period. CONCLUSION: The use of Colapinto TIPS needle, especially under cone-beam CT image guidance, appears to be safe and effective to re-enter the true lumen in a subintimal angioplasty for a difficult chronic total iliac occlusion.

Early and intermediate-term results of the extracardiac conduit total cavopulmonary connection for functional single-ventricle hearts.

BACKGROUND/PURPOSE: Fontan operation has evolved from atriopulmonary connection to total cavopulmonary connection (TCPC) due to its advantages in terms of hemodynamics and reduction of atrium-related complications. We analyzed the early and intermediate-term results of extracardiac conduit TCPC (EC-TCPC) procedure in patients with functional single ventricle to investigate the risk factors of surgical mortality and intermediate failure. METHODS: Retrospective review of the medical records of 88 consecutive patients with functional single ventricle who underwent EC-TCPC from 2000 to 2013 was conducted. RESULTS: The follow-up was 100% complete, ranging from 3 months to 13 years (mean 7.0 ± 3.8 years). There were two (2.3%) hospital and 18 (20.4%) late deaths. The estimated event-free survival rates at 1 year, 5 years, and 10 years were 90.6%, 89.3%, and 77.2%, respectively. On univariate analysis, fenestration was the only risk factor for surgical mortality (p = 0.027). On multivariate analysis, the significant atrioventricular valve regurgitation was the only risk factor for intermediate failure (p = 0.017). CONCLUSION: The clinical results of EC-TCPC in patients with functional single ventricle were satisfactory. The patients who needed fenestration during operation had higher risk of surgical mortality. Significant atrioventricular valve regurgitation had negative impact on intermediate survival.

Left Atrial Expansion Index Predicts Left Ventricular Filling Pressure and Adverse Events in Acute Heart Failure With Severe Left Ventricular Dysfunction.

BACKGROUND: The power of left atrial (LA) parameters for predicting left ventricular (LV) filling pressure and adverse events in acute heart failure (HF) with severe LV dysfunction, either sinus rhythm or atrial fibrillation (AF), is not fully understood. METHODS AND RESULTS: Echocardiography was performed in 141 patients with acute decompensated congestive HF and LV ejection fraction <35%, including 42 with permanent AF. The LA expansion index was calculated as (Volmax - Volmin) × 100%/Volmin, where Volmax was defined as maximal and Volmin as minimal LA volume. Of 141 patients, invasive LV filling pressures within 12 hours of LA expansion index measurement were available in 109. The end points were 3-year frequencies of HF hospitalization and all-cause mortality. Over a median follow-up of 3.1 years, 74 participants (52.5%) reached the end points (sinus vs AF group: 48.5% vs 61.9%, respectively; P = .047). Multivariate analysis revealed that adverse events of both groups were only independently associated with age and LA expansion index. Rates of adverse events were proportional to LA expansion index. There was a good logarithmic relationship between LA expansion index and LV filling pressure, regardless of presence or absence of AF. CONCLUSIONS: LV filling pressure can be estimated well by LA expansion index, with or without AF. The LA expansion index predicts adverse events in HF patients with severe systolic dysfunction. (ClinicalTrials.gov number: NCT01307722).

Treatment strategies for acute coronary syndrome with severe mitral regurgitation and their effects on short- and long-term prognosis.

Mitral regurgitation (MR) of even mild severity affects the prognosis of patients with acute coronary syndrome (ACS). The present study retrospectively analyzed 1,142 patients with ACS and MR of varying severity. Of the 95 patients with severe MR, 57 (60%) underwent primary percutaneous coronary intervention only and 38 (40%) underwent coronary artery bypass grafting (CABG) and mitral valve replacement (MVR). The severity of MR was significantly associated with the risk of heart failure but not with in-hospital or long-term mortality. In patients with severe MR, in-hospital mortality was no greater in those treated with CABG and MVR than in those treated with percutaneous coronary intervention alone. However, the incidence of long-term hard events (heart failure and all-cause mortality) was lower in those who had received the combined treatment. Multivariate analysis showed that, compared to percutaneous coronary intervention alone, CABG combined with MVR at the acute phase of ACS resulted in a significantly improved prognosis (odds ratio 0.172, 95% confidence interval 0.046 to 0.649, p = 0.009), even after adjusting for age, left ventricular filling pressure, and ejection fraction. In conclusion, the severity of MR in patients with ACS is associated with long-term heart failure events. Even at the acute phase of ACS, CABG combined with MVR results in an acceptable in-hospital mortality rate. The combined strategy also reduced the long-term hard events.

Left atrial expansion index for predicting atrial fibrillation and in-hospital mortality after coronary artery bypass graft surgery.

BACKGROUND: Atrial fibrillation (AF), a common complication after coronary artery bypass graft surgery (CABG), is associated with prolonged hospital stay. This prospective study assessed the accuracy of left atrial parameters and additional preoperative characteristics for predicting post-CABG AF and in-hospital mortality. METHODS: A total of 197 patients without hemodynamic-significant valvular problems, who received isolated CABG, were enrolled. Echocardiography was performed before CABG. RESULTS: Compared with patients without post-CABG AF, those with post-CABG AF were older (71 vs 64 years, p<0.0001), had a higher incidence of CABG during index hospitalization of acute myocardial infarction and preoperative respiratory failure requiring ventilator support, lower left ventricular ejection fraction (0.41 vs 0.48, p<0.0001), lower left atrial expansion index (52.2% vs 93.3%, p<0.0001), and higher left ventricular filling pressure (24.2 vs 19.1 mm Hg, p<0.0001). Multivariate analysis of preoperative variables showed that independent predictors of AF included age (odds ratio [OR], 1.064; 95% confidence interval [CI], 1.022 to 1.107 per 1-year increase; p 0.002), maximal indexed left atrial volume (OR, 1.026; 95% CI, 1.002 to 1.051 per 1 mL/m2 increase; p 0.037) and left atrial expansion index (OR, 0.981; 95% CI, 0.962 to 0.998 per 1% increase; p 0.029). The left atrial expansion index was also significantly associated with in-hospital mortality (OR, 0.982; 95% CI, 0.951 to 0.996 per 1% increase; p 0.042). Incidence of post-CABG AF in patients with left atrial expansion index less than 120% progressively increased as left atrial expansion index decreased. CONCLUSIONS: Left atrial expansion index independently predicts post-CABG AF and in-hospital mortality.

Single-dose time-resolved contrast enhanced hybrid MR angiography in diagnosis of peripheral arterial disease: compared with digital subtraction angiography.

PURPOSE: To prospectively study the diagnostic performance of hybrid single-dose contrast-enhanced MRA of peripheral arterial disease (PAD), with digital subtraction angiography (DSA) as the reference standard. MATERIALS AND METHODS: Hybrid MRA, combining time resolved imaging of contrast kinetics and two-station bolus-chase sequences, of lower limb was performed in 31 PAD patients (21 men, 10 women; mean age, 72 years) with two separate gadobenate dimeglumine (8 mL) injections in each sequence. Two independent blinded readers analyzed the vascular stenosis (32 segments in each limb). Sensitivity, specificity, and accuracy in all vascular segments and segments below popliteal artery were calculated. Interobserver agreements on MRA and intermodality agreements between MRA and DSA were calculated by using k statistics. RESULTS: Sensitivity, specificity, and accuracy of the hybrid MRA with regard to hemodynamically significant stenosis in all vascular segments were 92%, 97%, and 95% for reader 1, and 90%, 92%, and 92%, for reader 2, respectively. The interobsever agreements on MRA were good (k = 0.77-0.74) for all-grade stenosis, and excellent (k = 0.82-0.81) for hemadynamically significant stenosis. The intermodality agreements are good to excellent (k = 0.73-0.94). CONCLUSION: Single-dose hybrid MRA is a safe and reliable noninvasive alternative to conventional DSA in the assessment of PAD patients.

Acinar cell carcinomas with exophytic growth and intraductal pancreatic duct invasion: peculiar multislice computed tomographic picture.

On an ultrasound and multislice computed tomography (MSCT), a 76-year-old woman was found to have a huge mass lesion in the pancreatic head. MSCT showed 8.4 cm well-enhancing exophytic tumor of the pancreatic head which also protruded into the duodenum. A tongue-like protrusion into the main pancreatic duct was depicted. Laboratory data showed elevated carbohydrate antigen 19-9. Whipple's operation was performed. The pathological diagnosis was acinar cell carcinoma (ACC) originating in the pancreatic head and directly invading through the duodenal wall and the main pancreatic duct, without any lymph node involvement. A peculiar ACC with good enhancement, exophytic picture and tongue-like protrusion into the main pancreatic duct on MSCT is presented.

Adrenocorticotropin-producing pulmonary tumorlets with lymph node metastasis.

A case of pulmonary tumorlets with ectopic adrenocorticotropin (ACTH) production and lymph node metastasis in a bronchiectatic patient is reported. A 65-year-old man underwent right lower lobe lobectomy because of a sudden attack of cough and hemoptysis. Histological study revealed multiple discrete uniform small nests of tumor cells surrounding dilated bronchioles. Tumor nests were also found in the hilar lymph node. Immunohistochemically, the proliferating cells were confirmed to be neuroendocrine in origin with ectopic ACTH production, despite being clinically silent. The findings in the present case suggest that the clinical behavior of pulmonary tumorlets may be like a carcinoid, and need to be treated as tumor-like lesions. Ectopic hormonal production in the present case suggests pulmonary tumorlets should be considered in the differential diagnosis of Cushing's syndrome.