Resolution of chronic regurgitation in an 8 month old Babydoll sheep by thoracoscopic treatment of a vascular ring anomaly.

OBJECTIVE: The objective was to describe the successful thoracoscopic treatment of esophageal entrapment resulting from a vascular ring anomaly (VRA) comprising a persistent right aortic arch (PRAA) and left ligamentum arteriosum (LA) in a Babydoll sheep wether. STUDY DESIGN: Case report. ANIMAL: Eight month old Babydoll sheep wether, 13 kg. METHODS: The patient presented with a weight half that of its sibling, persistent regurgitation following eating, and delayed growth noted from the age of approximately 2 months, coinciding with the introduction of solid feed into the diet. Plain thoracic radiographs were within normal limits but computed tomography angiography (CTA) confirmed multiple congenital vascular anomalies. The primary finding was esophageal and tracheal entrapment by a PRAA and left LA. Thoracoscopic transection of the LA was performed with a bipolar vessel sealing device with the aid of transesophageal endoscopy. RESULTS: Immediate improvement in attitude and absence of regurgitation were observed. The patient was discharged and subsequently reintroduced to grazing and long-stem hay, which were previously not tolerated. By 6 months post discharge, the patient's weight was 36 kg, comparable to an age-matched sibling and considered appropriate for the stage of growth. CONCLUSION: Thoracoscopic transection of the LA in sheep is a feasible treatment for esophageal compression resulting from a VRA. Surgical intervention resolved the clinical signs and allowed normal digestive rumination, restoring bidirectional esophageal function in a ruminant.

[Double aortic arch and aortotracheal fistula as cause of fatal massive bleeding: a rare and dangerous association]. / Doble arco aórtico y fistula aortotraqueal como causa de hemorragia masiva fatal: una asociación rara y peligrosa.

Vascular rings are unusual congenital malformations. Among them, double aortic arch (DAA) is often difficult to diagnose due to its low incidence of symptoms. DAA can be associated with tracheal or esophageal compression and, in severe cases, could require tracheal intubation or chronic use of a nasogastric tube. This scenario favors the development of aortotracheal fistulas (ATF) or aortoe-sophageal fistulas (AEF). OBJECTIVE: To present a clinical case with an unusual association of DAA with ATF and to reinforce the importance of maintaining high diagnostic suspicion in patients with massive aerodigestive bleeding without an obvious source. CLINICAL CASE: A 32-week preterm newborn who required prolonged mechanical ventilation and presented intermittent episodes of massive oropharyngeal bleeding with hemodynamic compromise associated with lower airway obstruction without pulmonary hemorrhage. The patient underwent upper endoscopy and exploratory laparotomy without evidence of bleeding. Flexible nasopharyngolaryngoscopy and direct laryngoscopy also showed no abnormalities. A CT angiography showed complete DAA with indentation of the left dominant arch over the trachea, without severe stenosis or evidence of a fistula. AEF was suspected, so exploratory surgery was considered. However, the patient died before surgery due to a massive pulmonary hemorrhage. The autopsy revealed the presence of ATF. CONCLUSIONS: In patients with massive aerodigestive bleeding without an obvious source, the presence of DAA and possible AEF/ ATF should be considered. Imaging studies have a poor performance for this diagnosis, so surgery should be considered for diagnosis and treatment in these patients.

[Right Middle Lung Cancer with Double Aortic Arch:Report of a Case].

Double aortic arch is an embryological abnormality of the aortic arch forming a vascular ring. It has been noted that the right recurrent nerve travels differently in patients with a duplicated aortic arch and may be in close proximity to the area of superior mediastinal lymph node dissection in lung cancer. We report a surgical case of a patient with right middle lung cancer associated with a duplicated aortic arch. A 64-year-old man was referred to our hospital because of a nodular shadow in the right lung field noted on chest X-ray during a medical checkup. A transbronchial needle biopsy revealed a diagnosis of adenocarcinoma, and right middle lobe resection and lymph node dissection were performed. When dissecting the superior mediastinal lymph nodes in a patient with an overlapping aortic arch, it was necessary to carefully perform the operation, paying attention to the running of the right recurrent nerve.

Contralateral Thoracotomy With Extracorporeal Circulation for Reoperative Resection of a Kommerell Diverticulum.

Reoperative vascular ring surgery is uncommon. Standard redo ipsilateral thoracotomy may present technical challenges and risks. We describe a patient with right aortic arch, aberrant left subclavian artery, and a Kommerell diverticulum in whom previous vascular ring division via left thoracotomy did not relieve dysphagia. Three years after the unsuccessful operation, left subclavian-carotid transposition via supraclavicular incision followed by resection of the Kommerell diverticulum via right thoracotomy with extracorporeal circulation relieved symptoms. Contralateral thoracotomy with extracorporeal circulation provides a safe, alternative approach to redo ipsilateral thoracotomy for resection of a symptomatic Kommerell diverticulum. We review the literature on the incidence, surgical indications, and operative approaches to manage symptoms from a Kommerell diverticulum.

Management of esophageal cancer in patients with a right aortic arch or double aortic arch: a case series of 34 cases.

BACKGROUND: Few cases describing patients with a right aortic arch (RAA) or double aortic arch (DAA) and esophageal cancer (EC) have been reported. METHODS: We analyzed RAA and DAA cases treated with esophagectomy in our center's database and reported in English-language studies until April 1, 2023. Our study assessed the malformation characteristics and surgical details of EC patients with RAA and DAA. RESULTS: We extracted data of 24 EC patients with RAAs and 10 EC patients with DAAs. In both groups, the patients were more likely to be Japanese and male, to have squamous cell carcinoma and to have tumors located in the upper thoracic esophagus or middle thoracic esophagus. Left thoracotomy was commonly applied for RAA patients. For DAA patients, the proportions of left-sided and right-sided approaches were similar. Esophagectomy under video-assisted thoracoscopic surgery (VATS) in RAA or DAA patients had been performed on a routine basis in recent years. There were two anastomotic leakages in each group. Specifically, Kommerell diverticulum rupture occurred in 1 RAA patient; gastric tube dilation occurred in 1 DAA patient; and recurrent laryngeal nerve (RLN) injury occurred in 2 RAA patients. The postoperative course was uneventful for most patients in both cohorts. CONCLUSIONS: Esophageal carcinoma is rarely seen in patients with an RAA or DAA. To adequately dissect superior mediastinal LNs, an auxiliary incision (such as sternotomy), the left door open method or a preceding cervical procedure should be used appropriately. Esophagectomy, whether via thoracotomy or thoracoscopic surgery, can be performed safely for both RAA and DAA.

Narrowing Down the Symptomatology of Isolated Vascular Rings in Children.

Vascular rings may cause respiratory or gastrointestinal symptoms due to compression of the trachea and/or esophagus. Advances in imaging have enabled early detection in asymptomatic patients posing new management dilemmas. Surgery is expected to relieve symptoms, although this has not been well studied. We sought to evaluate the presence and pattern of symptoms associated with vascular rings before surgical intervention and to detail symptom resolution after surgery. A 10-year retrospective review of patients diagnosed with an isolated vascular ring was performed between January 2010 and December 2019. 100 patients were identified; 35 double aortic arch (DAA) and 65 right aortic arch and left ligamentum arteriosum (RALL). 73 patients were symptomatic on presentation; 47 had respiratory, 5 had gastrointestinal, and 21 had both types of symptoms. Surgical repair was performed in 75 patients; 74 were symptomatic. Respiratory symptoms were more likely in patients with preoperative tracheal narrowing (p < 0.001). Moderate-severe respiratory symptoms led to surgery in RALL patients (OR 10.6, p = 0.0001). DAA patients were more likely to undergo surgery (p < 0.001) irrespective of symptom severity. At a median post-surgical follow-up of 4 months, there was a significant reduction in symptom burden (p < 0.001), except for asthma symptoms (p = 0.131). Symptom resolution was not dependent on the vascular ring anatomy (p = 0.331) or the age at operation (p = 0.158). Vascular rings are typically accompanied by respiratory symptoms and less commonly GI symptoms, both of which resolve in most patients after surgery. Those who present predominantly with asthma-like symptoms may not achieve resolution after surgery.

Persistence of aerodigestive symptoms after vascular ring repair.

OBJECTIVE: Vascular rings are often associated with respiratory and swallowing difficulties due to tracheal or esophageal compression. While the results of a vascular ring repair are considered excellent, the long-term effect of tracheal and esophageal remodeling and the persistence of symptoms have scarcely been reported. Our study aims to evaluate the respiratory and swallowing outcomes of vascular ring repair. STUDY DESIGN AND METHODS: A retrospective cohort study of children who underwent vascular ring repair between 2010 and 2022 in a tertiary-care children's hospital. RESULTS: There were 108 patients enrolled: sixty-three patients (57.41 %) with a right aortic arch, 42 patients (38.89 %) with a double aortic arch, and 3 patients (2.78 %) with other vascular rings. Forty-three (39.81 %) patients were diagnosed prenatally. Of the 65 patients (60.19 %) diagnosed postnatally, 35/65 (53.85 %) had either respiratory or swallowing symptoms as the indication for diagnostic workup. Persistent respiratory and swallowing symptoms were noted in 34/108 (31.48 %) and 30/108 (27.78 %) patients, respectively, within a year of surgical repair. Fourteen patients underwent repeated laryngoscopy and bronchoscopy that demonstrated residual tracheomalacia; however, only 2/14 (1.9 %) patients required tracheostomy tube placement, and 6-out-of-7 patients were weaned off positive pressure airway support. Persistent respiratory symptoms were significantly more common in patients with a double aortic arch compared to a right aortic arch. No differences were noted in demographics, comorbidities, and preoperative aerodigestive symptoms between patients with residual symptoms and patients with no residual symptoms. CONCLUSIONS: Persistent respiratory and swallowing symptoms after vascular ring repair are not uncommon. Postoperative evaluation should be pursued by a dedicated team, and treatment considered as appropriate.

Computed tomographic features of double aortic arch in six dogs.

Double aortic arch (DAA) is a rare, congenital anomaly in small animals, resulting in a complete vascular ring encircling the esophagus and trachea, and subsequent compression of these organs. Few studies have reported utilizing CT angiography (CTA) for diagnosing DAA in dogs; thus, the imaging features are currently lacking in the literature. The objectives of this retrospective, multicenter, descriptive case series were to report the clinical and CTA characteristics of DAA in surgically treated cases. Medical records and CTA images were reviewed. Six juvenile dogs met the inclusion criteria (median age: 4.2 months; range: 2-5 months). The most common clinical signs included chronic regurgitation (100%), decreased body condition (67%), and coughing (50%). Common CTA features of DAA included a dominant left aortic arch (median diameter: 8.1 mm) and minor right aortic arch (median diameter: 4.3 mm; 83%), an aberrant right subclavian artery arising directly from the right aortic arch (83%), segmental esophageal constriction (100%), and variable degrees of dilation cranial to the heart base, and marked tracheal luminal compression (median percent change: -55%; 100%) and leftward curvature of the trachea at the level of the bifurcation of the aortic arches (100%). All dogs underwent successful surgical correction with only minor postoperative complications. Due to the similarity of clinical and imaging characteristics described to that of other forms of vascular ring anomalies (VRA), CTA is vital for the specific diagnosis of DAA in dogs.

COMMD5 is involved in the mechanisms of hypotension after parathyroidectomy in patients receiving hemodialysis.

BACKGROUND: Secondary hyperparathyroidism (SHPT) is a common complication of end-stage renal disease. Parathyroidectomy (PTx) is often employed for treatment of severe SHPT. However, PTx may cause hypotension via unknown mechanisms. COMM domain-containing protein 5 (COMMD5) in the parathyroid glands has been linked to blood pressure regulation of spontaneously hypertensive rats. OBJECTIVE: To explore the relationship between COMMD5 levels and reduced BP after PTx in patients receiving hemodialysis (HD). METHODS AND RESULTS: (1) The study cohort included 31 patients receiving HD who underwent PTx. Serum COMMD5 levels were higher post-PTx vs. pre-PTx. (2) Sprague-Dawley rats (n = 22) were assigned to a 5/6 nephrectomy group or sham surgery group, vascular rings of the thoracic aorta from rats with CKD were incubated with COMMD5, and changes in vascular tension were compared. COMMD5 inhibited vasoconstriction of vascular rings with intact endothelium, but had no effect on vascular rings without the endothelium. (3) Human umbilical vein endothelial cells were stimulated with COMMD5 or small interfering RNA (siRNA). The expression levels of atrial natriuretic peptide (ANP) and endothelial nitric oxide synthase (eNOS) were up-regulated and down-regulated, respectively. CONCLUSIONS: Serum COMMD5 levels were increased after PTx in SHPT patients. COMMD5 promoted high expression of ANP and eNOS in endothelial cells, leading to vasodilation and resulting in hypotension.

Recognising ligamentous atresia in double aortic arch.

Ligamentous atresia of the left side of a double arch distal to the left subclavian artery is a rare form of vascular ring, which can easily be confused, on transthoracic echocardiography, with the right-sided aortic arch when there is mirror-imaged branching. Because of its rapid acquisition, computed tomographic angiography with three-dimensional reconstruction has now become the modality of choice for accurate diagnosis of the various forms of double aortic arch. It can be performed without sedation in any age group, including neonates. It provides excellent visualisation of the aortic arch and its branching pattern, thus permitting accurate diagnosis and surgical planning. We present a case series of six children with this rare vascular ring assessed using CT, highlighting their outcomes.

Concurrent double aortic arch and circumflex aorta repair in a symptomatic child: a case report.

Double aortic arch with circumflex aorta is a rare type of vascular ring. Symptoms result from external compression of the trachea and esophagus. The best surgical approach for patients with double arch and circumflex aorta is debated, and options include the highly complex aortic uncrossing procedure. Herein we describe the surgical treatment of a patient with concurrent double aortic arch and circumflex aorta by division of the non-dominant arch and ligamentum arteriosum, plication and posterior tacking of the diverticulum of Kommerell. This left thoracotomy approach provided complete symptom resolution.

Esophageal cancer with a double aortic arch: a case report and literature review.

BACKGROUND: Double aortic arch (DAA) is an extremely rare vascular malformation, even more so when coexisting with esophageal cancer. METHODS: We report a new case of DAA with esophageal cancer recently seen at our Thoracic Tumor Clinic and review cases of DAA coexisting with esophageal cancer reported in the literature of English language from 2010 to 2020. The purposes of our literature review were to explore how to best achieve radical esophagectomy while reducing postoperative complications. The clinical manifestations, diagnostic method, surgical approach, reconstruction route, and the extent of lymphadenectomy of esophageal cancer with DAA were analyzed in detail. RESULTS AND CONCLUSION: For such patients, 3D computed tomography is necessary for preoperative diagnosis. The surgical approach should consider factors such as the location of the tumor in the esophagus and whether the tumor is surrounded by DAA, as well as the position of the descending aorta and the requirements for the surgical field for lymphadenectomy. If esophageal reconstruction is required, the retrosternal route is preferred. We recommend that only patients with positive results of intraoperative frozen biopsy of recurrent laryngeal nerve lymph nodes should undergo three-field lymphadenectomy, which may be the best method to achieve radical esophagectomy for middle and lower esophageal cancers with DAA while minimizing postoperative complications.

Long-term outcomes in children undergoing vascular ring division: a multi-institution experience.

OBJECTIVES: Vascular rings are rare anomalies of congenital heart disease that cause respiratory and gastrointestinal symptoms. This study assessed the long-term outcomes of patients with vascular ring division. METHODS: A multi-institution retrospective review of 371 patients with vascular rings undergoing surgical division at 3 paediatric cardiac institutions between November 2007 and October 2019 was performed. RESULTS: The complete vascular rings consisted of a double aortic arch (24.5%), right aortic arch with left ligamentum arteriosum (36.7%) and left aortic arch, with right ligamentum arteriosum (0.5%). The incomplete vascular rings consisted of a pulmonary artery sling (22.9%), left aortic arch with aberrant right subclavian artery (15.1%) and innominate artery compression syndrome (0.3%). Respiratory symptoms included stridor (71.4%), wheezing (49.1%), coughing (31.5%), gastrointestinal symptoms included choking (12.4%), dysphagia (3.2%) and emesis (1.9%). Only one patient died after discharge, yielding a late mortality rate of 0.3% (1/360). The 10-year overall survival rate was 96.8%. Postoperative complications were reported in 51 patients, 15 of whom required reoperation. The 10-year freedom from reoperation rate was 95.9%. Follow-up was completed in 95.4% (354/371) of patients, with a mean follow-up time of 4.3 ± 2.9 years (range from 1 to 13 years). Twenty patients (5.6%) experienced residual symptoms during long-term follow-up. CONCLUSIONS: The outcomes of vascular ring division are excellent. A Kommerell diverticulum >1.5 times the aberrant left subclavian artery origin is an operative indication for primary resection. Tracheomalacia is a risk factor for reoperation and residual symptoms, and preoperative fibrobronchoscopy is important for evaluation.

Congenital Aortic Vascular Ring: In-Utero Sonographic Assessment of Tracheal Patency and Postnatal Outcome.

OBJECTIVE: Congenital aortic vascular ring may present after birth with variable degrees of respiratory distress due to tracheal compression. The aim of this study was to prospectively evaluate in utero tracheal patency in correlation with postnatal outcome. METHODS: During an eight-year period, fetuses with aortic arch abnormality encircling the trachea and forming a complete ring were recruited for the study. Tracheal patency was classified as: no compression, partial compression, or complete compression. Postnatal MRI/CTangio studies were performed and outcome data was retrospectively analyzed from the medical records. RESULTS: Among the 46 fetuses recruited to the study, 38 had right aortic arch (RAA), and 8 presented with double aortic arch (DAA). In the RAA group 35 (92.1 %) of the fetuses presented no compression and 34 (97.1 %) of them were asymptomatic in the long-term follow-up. Three fetuses (7.9 %) in this group presented in utero compression: one was terminated at 16 weeks of gestation due to associated ominous findings, and the other two had mild respiratory symptoms around 12 months of age and underwent surgery with a good outcome. In the DAA group, all fetuses presented in utero with tracheal compression. Seven showed partial and one complete compression. Among the seven with partial compression, six were symptomatic and underwent surgery. The case with severe airway occlusion had emergency tube insertion in the delivery room and underwent surgery at 7 days but died from severe respiratory complications. CONCLUSION: This is the first study to evaluate in utero tracheal patency in cases with vascular ring. It allows better prenatal and postnatal workup and follow-up including potentially life-threatening respiratory failure.

Influence of Fetal Diagnosis on Management of Vascular Rings.

BACKGROUND: Fetal diagnoses of vascular rings have been increasing. We compared management strategies and outcomes of infants with fetal diagnosis with those with postnatal diagnosis to inform recommendations regarding optimal management. METHODS: A retrospective review was performed of vascular ring operations from January 2000 to June 2019. Standard demographic data (preoperative clinical status, timing of diagnosis, cross-sectional imaging, operative and perioperative details, and clinical outcomes) were collected. Statistical analysis was performed to compare characteristics and outcomes of fetal versus postnatal diagnosis. RESULTS: Of 190 patients, 15% (n = 29) were diagnosed prenatally. Anatomic variants were double aortic arch (n = 66, 14 fetal diagnoses), right aortic arch, aberrant left subclavian artery (n = 94, 12 fetal diagnoses), circumflex aorta (n = 7, 1 fetal diagnosis), and pulmonary artery sling (n = 19, 2 fetal diagnoses). An increasing frequency of fetal diagnoses has been noted in the past 10 years. In 2012 1 of 9 patients (11%) had a fetal diagnosis, whereas in 2018 8 of 11 (72%) had a fetal diagnosis (P < .001). Patients with a fetal diagnosis were significantly younger at the time of surgery (13.1 months [interquartile range (IQR), 20.6] vs 24.0 months [IQR, 87.0], P = .029). There was no difference in postoperative complications or length of stay (3 days [IQR, 1] for fetal diagnoses vs 4 days [IQR, 3] for postnatal diagnoses, P = .50). CONCLUSIONS: Fetal diagnosis leads to the potential for expectant management of vascular ring patients. This has resulted in earlier time of intervention with no increase in postoperative morbidity. This may lead to improved long-term outcomes and potentially alter the natural history for these children.

A Ten-year Single-center Surgical Experience With Symptomatic Complete Vascular Rings.

BACKGROUND: Limited data exist on the management of complete vascular rings (CVR) in adults. We reviewed our institution's surgical experience in the management of these patients. METHODS: Between 2010 and 2019, all adult patients that underwent a thoracotomy for a CVR repair were identified. We performed a retrospective medical record review of these patients to characterize their demographics and outcomes. RESULTS: Among the 5 patients identified (3 females, 2 males; Mean age 50 ± 9 years), anatomic variants were right arch and Kommerell diverticulum (KD) in 3 (60%) and double aortic arch in 2 (40%) patients. Indications for operation included dysphagia in 4 (80%), respiratory symptoms in 3 (60%) and aneurysmal KD in 1 (20%) patient. Two right aortic arch exclusion, 1 ligamentum arteriosum (LA) division, 1 LA division combined with a KD resection and 2 aortic reconstructions with interposition Dacron graft under partial cardiopulmonary bypass, were performed. Two carotid-subclavian artery transpositions prior to the thoracotomy were done. The postoperative length of stay was 10.0 (IQR 7.3-14.8) days. One reoperation for chylothorax and 1 for symptoms recurrence were performed for the same patient. Over a follow-up period of 1.4 (IQR 0.4-7.0) years, no mortality or major postoperative complications occurred. At their last follow-up visit, all patients reported no related remaining symptoms, except for persisting mild asthma in 1 patient. CONCLUSIONS: Open repair of CVR in adults can be performed safely with low complication rate. Symptoms improved in all patients after definitive repair.

Reoperation to correct unsuccessful vascular ring and vascular decompression surgery.

OBJECTIVE: Although most children do well after operations to relieve vascular compression of the esophagus and airway, many will have persistent/recurrent symptoms. We review our surgical experience using a customized approach to correct various etiologies of failure after vascular ring/decompression surgery. METHODS: Our institutional database identified children who underwent reoperation for persistent/recurrent symptoms after vascular ring or aberrant arterial decompression surgery between January 2014 and December 2019. Charts were reviewed for operative approaches and clinical data. Findings were analyzed by Fisher exact test for comparison between groups. RESULTS: Twenty-seven children required reoperative surgery. Detailed preoperative workup identified 5 etiologies of failure for a customized approach. Residual scarring was corrected by lysis and rotational esophagoplasty (n = 23/27); fibrotic bands re-creating a ring were divided (n = 11); ongoing vascular compression was addressed by descending aortopexy (n = 19), aberrant subclavian division (n = 7), aortic uncrossing procedure (n = 4), and Kommerell resection (n = 8); anterior aortopexy (n = 6) and anterior tracheopexy (n = 9) corrected cartilage malformation; and tracheobronchomalacia was addressed with posterior airway pexy (n = 26). At available short-term follow-up (median 1 year), 21 of 22 patients (95%) had symptom improvement, and on bronchoscopy, the average number of airway sections with severe tracheobronchomalacia decreased from 2.8 ± 1.7 to 0.5 ± 0.9 (P < .001). CONCLUSIONS: Persistent/recurrent symptoms after release of vascular compression are frequently caused by 5 different etiologies. A multidisciplinary strategy for workup and a customized operative approach can effectively treat these cases and may suggest opportunity at the index surgery to prevent reoperation and achieve optimal outcomes.

Surgical treatment of persistent right aortic arch with combined ligamentum arteriosum transection and esophageal diverticulum resection in three dogs.

OBJECTIVE: To describe the treatment of persistent right aortic arch (PRAA) in dogs with combined ligamentum arteriosum (LA) transection and esophageal diverticulum resection. ANIMALS: Three client owned dogs. STUDY DESIGN: Short case series. METHODS: Medical records were reviewed for clinical signs, diagnostic procedures, surgical treatment, post-operative therapies including medications and feeding regime, outcomes, and follow-up imaging. RESULTS: Esophageal resection was performed using a thoracoabdominal (TA) stapler with suture overlay. All dogs recovered well from surgery and did not experience any peri- or post-operative complications. The last follow-up was performed between 64 and 1004 days post-operatively. In all cases, regurgitation resolved and did not recur in any dogs. No dogs required medical therapy or dietary modifications. In two cases, follow-up imaging was performed that revealed marked improvement of esophageal dilation. CONCLUSION: Resection of esophageal diverticulum secondary to PRAA utilizing a TA stapler with suture overlay was technically feasible and did not seem associated with early or late complications.