Background
Pulmonary metastasectomy is an integral part of the interdisciplinary treatment of patients with pulmonary metastases (PMs) from colorectal carcinoma (CRC). Although alterations in the ...epidermal growth factor receptor (EGFR) pathway are common in CRC, there is still insufficient data regarding PM. We hypothesized that EGFR expression and Kirsten rat sarcoma viral oncogene homolog (
KRAS
)/
BRAF
mutations (Mts) might be associated with clinicopathological variables and the outcome in patients undergoing pulmonary metastasectomy.
Methods
In this single-center study, 44 patients undergoing pulmonary metastasectomy from primary CRC were included and prospectively followed up. Tissue specimens of resected PMs were assessed. Restriction fragment length analysis was used for
BRAF V600E
and
KRAS
codons 12 and 13 Mt analyses. EGFR expression was evaluated by immunohistochemistry. Patients were followed up in 3–6-month intervals.
Results
EGFR expression was evident in 49 % of the PMs, whereas Mts in
KRAS
and
BRAF
were detected in 48 and 0 %, respectively. Time to lung-specific recurrence after metastasectomy was significantly decreased in patients with
KRAS
mutated PMs in univariate (
p
= 0.013) and multivariate analysis (
p
= 0.035), whereas EGFR expression had no impact on recurrence free survival. Moreover, KRAS Mts were associated with the number of PMs (
p
= 0.037) and with the lung as first site of recurrence after metastasectomy (
p
= 0.047).
Discussion
This is the first evaluation of EGFR pathway alterations in the setting of pulmonary metastasectomy. Our data suggest that patients with
KRAS
Mts are at high risk for early pulmonary recurrence and have a more diffuse pattern of metastasis. These findings may have impact on the therapeutic management of CRC patients with pulmonary spreading.
Tetralogy of Fallot patients with pulmonary atresia (TOFPA) have a largely varying source of pulmonary perfusion with often hypoplastic and even absent central pulmonary arteries. A retrospective ...single center study was undertaken to assess outcome of these patients regarding type of surgical procedures, long-term mortality, achievement of VSD closure and analysis of postoperative interventions.
76 consecutive patients with TOFPA operated between 01.01.2003 and 31.12.2019 are included in this single center study. Patients with ductus dependent pulmonary circulation underwent primary single stage full correction including VSD closure and right ventricular to pulmonary conduit implantation (RVPAC) or transanular patch reconstruction. Children with hypoplastic pulmonary arteries and MAPCAs without double supply were predominantly treated by unifocalization and RVPAC implantation. The follow up period ranges between 0 and 16,5 years.
31 patients (41%) underwent single stage full correction at a median age of 12 days, 15 patients could be treated by a transanular patch. 30 days mortality rate in this group was 6%. In the remaining 45 patients the VSD could not be closed during their first surgery which was performed at a median age of 89 days. A VSD closure was achieved later in 64% of these patients after median 178 days. 30 days mortality rate after the first surgery was 13% in this group. The estimated 10-year-survival rate after the first surgery is 80,5% ± 4,7% showing no significant difference between the groups with and without MAPCAs (
> 0,999). Median intervention-free interval (surgery and transcatheter intervention) after VSD closure was 1,7 ± 0,5 years 95% CI: 0,7-2,8 years.
A VSD closure could be achieved in 79% of the total cohort. In patients without MAPCAs this was possible at a significant earlier age (
< 0,01). Although patients without MAPCAs predominantly underwent single stage full correction at newborn age, the overall mortality rate and the interval until reintervention after VSD closure did not show significant differences between the two groups with and without MAPCAs. The high rate of proven genetic abnormalities (40%) with non-cardiac malformations did also pay its tribute to impaired life expectancy.
Abstract
OBJECTIVES
Percutaneous pulmonary valve prostheses and right ventricle-to-pulmonary artery conduits are at risk for infective endocarditis (IE). In children and adults with a congenital ...heart disease, a pulmonary valve implant is frequently necessary. Prosthetic valve endocarditis is a conservatively barely manageable, serious life-threatening condition. We investigated the results of surgical pulmonary valve replacements in patients with IE.
METHODS
A total of 20 patients with congenital heart disease with the definite diagnosis of IE between March 2013 and July 2020 were included in this single institutional, retrospective review. Infected conduits were 11 Melody, 5 Contegra, 3 homografts and 1 Matrix P Plus. All of the infected prosthetic material was removed from the right ventricular outflow tract up to the pulmonary bifurcation. Pulmonary homografts were implanted after pulmonary root resection as right ventricle-to-pulmonary artery conduits.
RESULTS
All patients survived and were discharged infection-free. The mean time from the conduit implant to the operation for IE was 4.9 years 95% confidence interval (CI), 3.0–6.9. The median intensive care unit stay was 3.0 days (95% CI, 2.0–4.7), and the median hospital time was 25.0 days (95% CI, 19.2–42.0). Median follow-up time was 204.5 days (range 30 days to 5 years) without death or recurrent endocarditis.
CONCLUSIONS
The surgical treatment of IE of percutaneous pulmonary valve prostheses and right ventricle-to-pulmonary artery conduits is a safe and effective therapeutic concept. Early surgical referral of patients with suspicion of IE should be pursued to avoid sequelae such as right ventricular failure, septic emboli, intracardiac expansion and antibiotic resistance.
The en bloc rotation of the outflow tracts is a surgical option for anatomic repair of transposition of the great arteries, ventricular septal defect, and left ventricular outflow tract obstruction ...with preserved growth potential in all tubular structures and the option for keeping the native pulmonary valve. The aim of this study was to analyze our 15-year experience with this operation.
A retrospective single-center study including 27 consecutive patients, who underwent the en bloc rotation between 2003 and 2019, was performed. Median age at operation was 103 days (interquartile range IQR, 17-117 days), and median body weight was 5.2 kg (IQR, 3.66-8.4 kg). Six patients had undergone 1 to 4 previous operations. In 18 patients (66.7%), the pulmonary valve could be preserved, and in 9 patients (33.3%) a transannular patch was performed. Median follow-up was 5.7 years (IQR, 1.6-9.0 years).
One patient died of chronic left ventricular failure during the hospital stay. Two more died after discharge: 1 of aspiration after a cerebral hemorrhage and 1 of sudden death. Five other patients required reoperations or had reinterventions: 1 ventricular septal defect closure, 1 aortic valve repair, 1 patch plasty, 2 dilatations of supravalvular pulmonary stenosis, and 1 stent into a left pulmonary artery. During the follow-up period, no gradient in the left ventricular outflow tract was found, and postoperative growth of the pulmonary valve was shown.
The en bloc rotation allows an anatomic correction of the complex transposition with growth potential in all tubular structures. Reoperations or reinterventions on the pulmonary valve or on the left ventricular outflow tract have not been necessary to date.
The en-bloc rotation of the outflow tracts (EBR) enables an anatomic correction of transposition of the great arteries with ventricular septal defect and left ventricular outflow tract obstruction. ...The anatomical condition or previous palliative procedures may allow choosing an elective date for the anatomic correction. The aim of this study was to evaluate the optimal age for performing the EBR based on the largest series published so far.
At the Children's Heart Center Linz, the EBR was performed in 33 patients between 2003 and 2021. Median age at operation was 74 interquartile range (IQR) 17-627 days. Twelve patients were newborns (≤28 days), 9 older than 369 days. These 2 groups were compared to the remaining patients each regarding peri- and postoperative data, complications, reinterventions and mortality. The median follow-up period was 5.4 (IQR 0.99-11.74) years.
In-hospital mortality was 6.1%. All-cause mortality was lower in patients younger than 369 days at the time of EBR (4.2% vs 44.4% in patients >369 days old, P = 0.013). In newborns, intensive care unit stay (median 18.5 days vs 8 days, P = 0.008) and in-hospital stay (median 29.5 days vs 15 days, P = 0.026) were significantly longer, the risk for postoperative AV block was higher (33.3 vs 0%, P = 0.012) than in patients who had been corrected anatomically after the neonatal period.
The results of this study suggest the deferral of the EBR to the post-newborn period. A significantly higher mortality rate in patients of older age at operation seems to recommend the anatomic correction during the first year of life.
Abstract
OBJECTIVES
The aortic arch enlargement in the Norwood procedure is classically carried out using a curved homograft patch on the inner curvature of the neoaortic arch. The study ...investigates the outcome of a newly used artificial patch from a vascular prosthesis as an alternative to a homograft patch.
METHODS
Since April 2007, we used curved polytetrafluorethylene (PTFE) patches cut out of a prosthesis as an alternative to homograft patches for the aortic arch reconstruction. The decision for either patch material was made due to anatomic reasons, preferring PTFE patches in larger aortas. In this study, 224 Norwood patients, operated between April 2007 and April 2018, were analysed. A total of 104 patients received a PTFE patch (group PTFE), and 120 patients got a pulmonary homograft patch (group homograft). A single-centre retrospective analysis was carried out concerning postoperative course and long-term follow-up regarding aortic arch interventions and reoperations and comparing the 2 material groups.
RESULTS
There were no material associated operative or postoperative complications. In-hospital mortality was 13% in group PTFE. Six children died late during follow-up (6%). One aortic isthmus dilatation (1%) was carried out 12 months after the Norwood procedure in this group, no arch reoperation was necessary during the complete follow-up.
CONCLUSIONS
The curved PTFE patch showed good qualities in operative technical demands and excellent long-term results. In selected cases of hypoplastic left heart syndrome, it can be well used as alternative to the pulmonary homograft.
In the Norwood procedure, the large main pulmonary artery is connected to the hypoplastic aorta to warrant unrestrictive output to the systemic circulation.
Patients after the Norwood procedure are prone to postoperative instability. Extracorporeal membrane oxygenation (ECMO) can help to overcome short-term organ failure. This retrospective single-centre ...study examines ECMO weaning, hospital discharge and long-term survival after ECMO therapy between Norwood and bidirectional Glenn palliation as well as risk factors for mortality.
In our institution, over 450 Norwood procedures have been performed. Since the introduction of ECMO therapy, 306 Norwood operations took place between 2007 and 2022, involving ECMO in 59 cases before bidirectional Glenn. In 48.3% of cases, ECMO was initiated intraoperatively post-Norwood. Patient outcomes were tracked and mortality risk factors were analysed using uni- and multivariable testing.
ECMO therapy after Norwood (median duration: 5 days; range 0-17 days) saw 31.0% installed under CPR. Weaning was achieved in 46 children (78.0%), with 55.9% discharged home after a median of 45 (36-66) days. Late death occurred in 3 patients after 27, 234 and 1541 days. Currently, 30 children are in a median 4.8 year (3.4-7.7) follow-up. At the time of inquiry, 1 patient awaits bidirectional Glenn, 6 are at stage II palliation, Fontan was completed in 22 and 1 was lost to follow-up post-Norwood. Risk factor analysis revealed dialysis (P < 0.001), cerebral lesions (P = 0.026), longer ECMO duration (P = 0.002), cardiac indication and lower body weight (P = 0.038) as mortality-increasing factors. The 10-year mortality probability after ECMO therapy was 48.5% (95% CI 36.5-62.9%).
ECMO therapy in critically ill patients after the Norwood operation may significantly improve survival of a patient cohort otherwise forfeited and give the opportunity for successful future-stage operations.
Historically, the surgical two-stage strategy of Taussig–Bing anomaly (TBA) and transposition of the great arteries (TGA) with associated aortic arch (AA) obstruction has been a frequent approach 1, ...2.
Abstract
OBJECTIVES
Taussig–Bing anomaly (TBA) and transposition of the great arteries (TGA) with hypoplastic or interrupted aortic arch (AA) are rare anomalies. Various operative techniques and a high incidence of reinterventions are described. The aim of this retrospective single-centre study was to evaluate operative data, mortality and reintervention rate with special regard to the AA.
METHODS
At the Children’s Heart Center Linz, 50 patients with the above-mentioned diagnosis have been corrected by a simultaneous repair between 2001 and 2022. Thirty-seven children had TBA, 13 had TGA and 5 of them had an interrupted AA. The median age at operation was 7 interquartile range (IQR) 5–9 days, weight 3.38 (IQR 2.9–3.8) kg and follow-up 9.3 (IQR 3.1–14.5) years. The AA reconstruction was performed without patch material in 49 cases.
RESULTS
There was 1 in-hospital mortality in a TBA patient and 1 late mortality (7 years later, neuroblastoma). 14/49 patients needed at least 1 reoperation (28.6%, all TBA) and 3 further patients had catheter reintervention or radiofrequency ablation only (6.1%, 2 TBA). Seventy-five percent of these procedures affected the right heart/pulmonary arteries; there was 1 re-coarctation repair.
CONCLUSIONS
The simultaneous correction of TBA and TGA with AA obstruction or interruption is a safe operation with very low mortality. The AA reconstruction with minimized use of patch material resulted in a low restenosis rate.
Abstract
A neoaortic aneurysm after a Norwood type reconstruction of the aorta can develop due to systemic pressure on the former pulmonary artery wall. A complex valve sparing procedure can preserve ...native valves and avoid a valve replacement with requirement for anticoagulation. This type of operation was carried out in 3 patients, 2 of them after a Fontan palliation, 1 after a Norwood–Rastelli repair. The reconstruction was done using Dacron prostheses for the replacement of the dilated wall, similar to a Yacoub modification in 2 cases and to a David’s modification in 1 patient. The postoperative course was uneventful and postoperative valve function was good in all cases.
Plastic bronchitis (PB) and protein-losing enteropathy (PLE) are devastating complications after Fontan palliation that lead to uncontrolled loss of protein-rich lymphatic fluid into extra lymphatic ...compartments. Decompression of the thoracic duct is a new treatment option that effectively restores lymphatic system integrity by redirecting lymphatic flow into the low-pressure levels of the common atrium.
We report a patient with severe failing Fontan circulation where surgical thoracic duct decompression leads to resolution of PLE and PB symptoms but worsening hypoxaemia that could be managed with banding of internal jugular vein.
Thoracic duct decompression in patients with failing Fontan circulation can be a simple and effective treatment for PLE and PB. Hypoxaemia may occur but can be managed with banding of internal jugular vein.
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