Bronchial trifurcation in a congenital pulmonary venolobar syndrome

Tracheal trifurcation: new cases and review of the literature

BACKGROUND

Tracheal trifurcation is an uncommon and often unknown type of anomalous tracheobronchial arborization, characterized by three main bronchi originating at the level of the carina. Diagnosis is important due to its clinical implications.

OBJECTIVE

To highlight the anatomical, clinical and diagnostic aspects of tracheal trifurcation by reporting our experience and reviewing the literature.

MATERIALS AND METHODS

We retrospectively evaluated pediatric patients referred to our institution from January 2018 to May 2020 with a diagnosis of tracheal trifurcation. All patients underwent chest radiographs, computed tomography (CT) (with/without dynamic airway scanning) and bronchoscopy. Clinical and anatomical data were collected.

RESULTS

Three patients with tracheal trifurcation were identified (1 female, median age: 7.6±0.4 months). All had associated anomalies: two had tetralogy of Fallot, one with esophageal atresia/tracheoesophageal fistula and one with an atrioventricular septal defect, and the other had skeletal ciliopathy. Chest radiographs were not diagnostic for tracheal trifurcation. Bronchoscopy could not fully evaluate the trachea and main bronchi in two cases. CT detected tracheal trifurcation in all of the patients and also demonstrated other lung parenchymal and congenital anomalies. Two of the three main bronchi were directed to the right lung in all cases. Ostial stenosis of either the central (two patients) or right upper bronchus (one patient) was present. No signs of tracheobronchomalacia were found.

CONCLUSION

Tracheal trifurcation is rare and often associated with additional disorders, such as other tracheobronchial anomalies, cardiovascular defects or esophageal malformations, responsible for clinical manifestations and earlier detection. Bronchoscopy is often used for diagnosis, but is invasive and may be incomplete or inconclusive, while CT allows for a noninvasive and correct diagnosis, while also highlighting additional findings in the thorax.

Congenital trifurcation of the trachea

"Tracheal trifurcation" is a veritable and rare finding. We illustrate a unique case that demonstrates the complexity and broad variability that congenital tracheobronchial anomalies can take. Appreciation of these is important at intubation, bronchoscopy, and surgery.

Association of three different congenital malformations in a same pulmonary lobe in a 5-year-old girl

We report the case of a 5-year-old girl with persistent chest X-ray abnormalities following an episode of pneumonia who has a complex congenital pulmonary malformation comprising of a congenital pulmonary airway malformation, an intralobar sequestration and two bronchogenic cysts, all present within the same lobe. The observation suggests a common embryological origin of these malformations.

Video-Assisted Thoracoscopic Surgery for Pulmonary Sequestration in Children

BACKGROUND

The purpose of this report is to describe our experience with video-assisted thoracoscopic surgery for pulmonary sequestration in children.

METHODS

From May 2001 to June 2004, video-assisted thoracoscopic surgery was attempted for antenatally diagnosed pulmonary sequestration in 8 consecutive infants. Mean age at the time of surgery was 10 months (range, 4 to 44 months). Six lesions were located in the left lower lobe and two in the right lower lobe. Endovascular embolization was attempted before video-assisted thoracoscopic surgery in only 1 patient. All procedures were performed in the lateral decubitus position, and single-lung ventilation was used in all cases.

RESULTS

Conversion to open surgery was necessary in two cases. Video-assisted thoracoscopic surgery was successful in 6 patients. After being identified and isolated, the aberrant artery was controlled by endoscopic ligation, and lobectomy, wedge resection, or sequestration was performed depending on the type of lesion. Mean operative time was 155 minutes. Average hospital stay was 3.5 days. There were no postoperative complications. Follow-up ranged from 4 to 50 months.

CONCLUSIONS

Video-assisted thoracoscopic surgery is technically feasible for pulmonary sequestration. Early resection obviates the risk of infection. Elective ligation of the aberrant artery is a safe alternative to the use of stapling devices or clips. Cosmetic results are excellent.

Pulmonary sequestration children: is the thoracoscopic approach a good option?

BACKGROUND

The thoracoscopic approach for pulmonary sequestration in children seems to be feasible and reproducible. To date, there have been no studies comparing the thoracoscopic approach with the conventional technique in this indication. Therefore, the aim of this study was to compare these two approachs.

METHODS

We performed a retrospective study in patients treated surgically for a prenatal diagnosis of pulmonary sequestration between 2000 and 2003. Three or five ports were used, and single-lung ventilation was required. The clinical, operative, and postoperative data were compared with those for patients operated on during the same period via thoracotomy. For statistical purposes, the children who required conversion to the open proecedure were grouped with those who underwent thoracotomy. The following data were compared: age, and weight, operating time, duration of postoperative drainage via chest tube, duration of postoperative narcotic use, pain scores on the 1(st) and 2(nd) days after the procedure, and length of hospital stay. The Mann-Whitney test was used for statistical analysis.

RESULTS

Five infants were operated on via a thoracoscopic approach. Two required conversion to an open procedure. There were four intralobar sequestrations (ILS) and one extralobar sequestration (ELS). The mean age at surgery was 6.2 months (range, 4-9). The mean operating time, excluding the patients who were converted to open, was 155 min (range, 120-190). In the thoracotomy group, there were one ELS and one ILS. Two groups were defined: the exclusively laparoscopy group (EL) (n = 3) and the thoracotomy and conversion group (TC) (n = 4). The duration of postoperative drainage, duration of postoperative narcotic use, and hospital stay seemed to be shorter in the group EL. These times, respectively, were 3.4 vs 2.75 days, 4.1 vs 3.3 days, and 7.5 vs 4.3 days = (p = 0.03). There were two complications in the TC group (one wound abcess and one pleural leak that required a chest tube).

CONCLUSION

The thoracoscopic approach for pulmonary sequestration is feasible. It seems to reduce the duration of postoperative drainage, postoperative narcotic use, hospital and stay. These results need to be confirmed by a prospective and more detailed study.