Transcatheter coil embolisation: a novel definitive treatment option for intralobar pulmonary sequestration

Interlobar pulmonary sequestration with celiac aberrant artery in an elderly patient treated with combined endovascular and video-assisted thoracoscopic approach

Pulmonary sequestration is a rare congenital pulmonary anomaly where a portion of the lung parenchyma is supplied by an anomalous systemic artery, usually originating from the thoracic or abdominal aorta. Traditionally surgical resection and ligation of the aberrant feeding vessel are the gold standard treatments of this disease. Hybrid operations consisting in endovascular arterial embolization and surgical resection is a promising treatment option. We report a case of a 69-years-old man with symptomatic intralobular sequestration successfully treated by hybrid approach.

Rare Combined Congenital Pulmonary and Cardiovascular Malformations Revealed by Acute Hemoptysis

Background

Lung sequestration is a subtype of congenital lung malformations; it is infrequently diagnosed in adults and is a rare cause of hemoptysis. The typical management of symptomatic lung sequestration is usually surgical, though intra-arterial embolization is becoming an acceptable alternative. Case Presentation. We report a case of a 36-year-old female patient who presented for an acute onset of hemoptysis. CT chest showed an intralobar sequestration of the right lower lobe lung segment. In addition to the sequestration, the chest imaging also revealed a number of associated abnormalities including double superior vena cava communicating through a bridge, absence of brachiocephalic venous trunk, cardiac dextroposition, and agenesis of the right middle lobe. Outcome and Discussion. The transarterial embolization was selected for being mini-invasive and effective. It successfully controlled the bleed and led to complete regression of the sequestered lung on the follow-up CT chest several months later.

Conclusion

Successful management and complete regression are possible with mini-invasive intra-arterial embolization of lung sequestration. Although it is not uncommon to have associated congenital cardiopulmonary abnormalities with lung sequestration, however the exceptional abnormalities described in this case have never been reported before.

Hybrid and Endovascular Treatment of Pulmonary Sequestration: Two Case Reports and Literature Review

Pulmonary sequestration is an uncommon congenital pulmonary anomaly associated with aberrant systemic arteries which usually originate from the thoracic aorta or abdominal aorta. Traditionally, surgical resection and ligation of the feeding vessels are the gold standard treatments of the disease. Endovascular intervention and hybrid operation are promising treatment options. However, the case reports with endovascular and hybrid treatment are sparse to our knowledge. We presented 2 symptomatic adult patients with pulmonary sequestration successfully treated by hybrid operation and transcatheter embolization, respectively. Besides, we reviewed 37 previously reported cases of pulmonary sequestration treated by endovascular or hybrid treatment.

Thoracic Stent Graft Accompanied by Coil Embolization for Pulmonary Sequestration

Thoracic stent graft plus coil embolization is a promising option for management of pulmonary sequestrations. Here we present the case of a 43-year-old male with chronic recurrent chest pain and hemoptysis that was incidentally identified as having a Pryce Type I pulmonary sequestration. The patient had a known history of gastritis, alcohol abuse, chronic leg and back pain, and was incidentally found to have an anomalous artery from the descending thoracic aorta to the left lower lobe. Due to recurrent hemoptysis and refractory back pain with no other identifiable etiology, he was consented for coil embolization and thoracic endovascular aortic repair. In conjunction with interventional radiology, coil embolization of the aberrant thoracic artery was performed under fluoroscopic guidance with good graft coverage of the aberrant artery with an endovascular graft. The patient’s postoperative recovery was uneventful and he reported a decrease in his chest pain. Repeat imaging including chest X-ray and CT angiography were performed prior to discharge. CT angiography demonstrated good positioning of the coils as well as the stent graft. The patient was discharged on postoperative day 1. Surgical intervention with ligation of the anomalous vessel has historically been the primary intervention for patients with Pryce Type I sequestrations, and it has yielded satisfactory results. However, thoracic stent graft in addition to coil embolization is a minimally invasive management option that should be considered as the first line of treatment because of the minimal physiologic burden on the patient and quicker recovery as compared to traditional thoracotomy.

Intralobar pulmonary sequestration originating from the intercostal arteries treated with surgical resection

Intralobar pulmonary sequestration originating from the intercostal arteries is rarely reported. Herein, we report an unusual case of a 56‐year‐old male patient with intralobar pulmonary sequestration supplied from the intercostal arteries on the left lower lobe who presented after a month of a repeated cough and massive hemoptysis. Although transcatheter arterial embolization was performed three times, the patient's symptoms were not relieved. A left lower lobectomy was performed with video‐assisted thoracic surgery. At the six‐month follow‐up after surgery, the patient had recovered well without any hemoptysis. Therefore, surgical resection with lobectomy may be a better alternative to transcatheter arterial embolization for the treatment of intralobar pulmonary sequestrations arising from the intercostal arteries. To our knowledge, this is the second reported case of intralobar pulmonary sequestration arising from the intercostal arteries.

Transarterial embolization of intralobar pulmonary sequestration in a young adult with hemoptysis

Intralobar pulmonary sequestration is a rare congenital malformation characterized by the presence of dysplastic lung that does not communicate with the tracheobronchial tree, and has aberrant systemic arterial supply. While most are asymptomatic, they rarely can present with hemoptysis, which has been traditionally managed with surgical resection of the sequestration. We report a case of an 18-year-old male who presented with acute large-volume hemoptysis on a background of recurrent minor episodes of hemoptysis, due to intralobar sequestration. He was successfully treated with transarterial embolization with a combination of polyvinyl alcohol (PVA) particles, gelfoam and coils. Transarterial embolization can be effective in managing emergent hemoptysis from pulmonary sequestration.

Evaluation of pulmonary sequestration with multidetector computed tomography angiography in a select cohort of patients: A retrospective study

OBJECTIVES

This study aimed to evaluate the role of multidetector computed tomography angiography in diagnosing patients with pulmonary sequestration.

METHODS

We retrospectively analyzed the computed tomography studies and clinical materials of 43 patients who had undergone preoperative multidetector computed tomography angiography in our hospital and had pathologically proven pulmonary sequestration. Each examination of pulmonary sequestration was reviewed for type, location, parenchymal changes, arterial supply and venous drainage on two-dimensional and three-dimensional computed tomography images.

RESULTS

Multidetector computed tomography successfully detected all pulmonary sequestrations in the 43 patients (100%). This included 40 patients (93.0%) with intralobar sequestration and 3 patients (7.0%) with extralobar sequestration. The locations of pulmonary sequestration were left lower lobe (28 cases, 70% of intralobar sequestrations), right lower lobe (12 cases, 30% of intralobar sequestrations) and costodiaphragmatic sulcus (3 cases). Cases of sequestered lung presented as mass lesions (37.2%), cystic lesions (32.6%), pneumonic lesions (16.3%), cavitary lesions (9.3%) and bronchiectasis (4.6%). The angioarchitecture of pulmonary sequestration, including feeding arteries from the thoracic aorta (86.1%), celiac truck (9.3%), abdominal aorta (2.3%) and left gastric artery (2.3%) and venous drainage into inferior pulmonary veins (86.0%) and the azygos vein system (14.0%), was visualized on multidetector computed tomography. Finally, the multidetector computed tomography angiography results of the sequestered lungs and angioarchitectures were surgically confirmed in all the patients.

CONCLUSIONS

As a noninvasive modality, multidetector computed tomography angiography is helpful for making diagnostic decisions regarding pulmonary sequestration with high confidence and for visualizing the related parenchymal characteristics, arterial supply, and venous drainage features to help plan surgical strategies.

Successful endovascular treatment of bilateral intralobar pulmonary sequestration with a bridging isthmus in a child

Pulmonary sequestration refers to aberrant formation of segmental lung tissue that has no connection with the bronchial tree and receives a blood supply from a systemic artery. Bilateral pulmonary sequestration, especially with a bridging isthmus is extremely rare. Although endovascular treatment is regarded as the less invasive alternative for the treatment of pulmonary sequestration, all previously reported bilateral pulmonary sequestrations have been treated surgically. We report the case of a 13-year-old girl who underwent successful endovascular treatment for bilateral pulmonary sequestration with a bridging isthmus. Thoracic CT angiography showed a heterogeneous mass-like consolidation in the both lower lobes connected each other via a bridging isthmus behind the heart. CT also demonstrated an aberrant artery, which originated from the celiac trunk, supplied the sequestration of the left lower lobe, and that a branch from the aberrant artery traversed to the sequestration in the right lower lobe. After percutaneous endovascular embolization using microcoils and gelfoam, the patient had no complications and the bilateral sequestration showed markedly decrease in the size.

Massive hemoptysis in a case of intralobar pulmonary sequestration associated with pulmonary hypoplasia and meandering right pulmonary vein: diagnosis and management

Pulmonary sequestration is a congenital malformation characterized by focal area of dysplastic lung tissue that lacks normal communication with tracheobronchial tree and receives blood supply from systemic arteries. Surgical resection has been the conventional method of treatment of pulmonary sequestration. In recent years transarterial embolization of the anomalous systemic arteries has emerged as a suitable alternative to surgery. In this paper, we describe transarterial coil embolization for control of massive life-threatening hemoptysis in a rare case of intralobar sequestration in right lung associated with ipsilateral pulmonary hypoplasia and meandering right inferior pulmonary vein. A 3-year follow-up computed tomographic (CT) angiography revealed complete regression of the sequestration along with altered pulmonary arterial contour. To the best of our knowledge, transarterial coil embolization for control of massive life-threatening hemoptysis in such a complex pulmonary anomaly has not yet been reported.

The clinical value of computer tomographic angiography for the diagnosis and therapeutic planning of patients with pulmonary sequestration

OBJECTIVES

This study was conducted to evaluate the clinical value of computed tomographic (CT) angiography for diagnosis and therapeutic planning in patients with pulmonary sequestration.

METHODS

Forty-three patients with suspected pulmonary sequestration underwent CT angiography before undergoing digital subtraction angiography or surgery. For each patient, CT angiography was used to determine whether the pulmonary sequestration was suitable for coil embolization, surgical resection or conservative treatment. The treatments planned using CT angiography were compared with actual treatment decisions made or treatments administered using digital subtraction angiography or surgery.

RESULTS

Digital subtraction angiography and/or surgery confirmed pulmonary sequestration in 37 patients; six patients had no pulmonary sequestration. The diagnostic performance of CT angiography for pulmonary sequestration in the patient-based evaluation yielded an accuracy of 97.7%, sensitivity of 97.3%, specificity of 100%, positive predictive value (PPV) of 100% and negative predictive value (NPV) of 85.7%. The aberrant systemic artery-based evaluation yielded an accuracy of 98.0%, sensitivity of 97.8%, specificity of 100%, PPV of 100% and NPV of 85.7%. Treatments could be correctly planned using CT angiography with 100% accuracy, sensitivity, specificity, PPV and NPV according to the aneurysm-based evaluation.

CONCLUSIONS

We have obtained promising results with a CT angiography-based protocol, rather than a digital subtraction angiography-based protocol, as the only diagnostic and pretreatment planning tool in patients with pulmonary sequestration. The CT angiography-based selection of treatment strategies seems to be safe and effective in the majority of patients with pulmonary sequestration.

[Endovascular treatment of pulmonary sequestration with Amplatzer® vascular plugs]

Pulmonary sequestration is a rare malformation characterised by non-functioning lung tissue, separated from the tracheobronchial tree and with arterial supply from the systemic circulation. The classical therapeutic approach is surgical resection. In recent years, the endovascular embolisation technique is increasingly being used for the treatment of this disease. The embolisation materials used are coils and vascular plugs. The Amplatzer® vascular plug is a self-expandable cylindrical mesh device, particularly useful for the embolisation of large vessels with high flow. Three cases of pulmonary sequestration were treated by embolisation with Amplatzer® vascular plugs. In all cases the procedure was performed without complications, and the aortopulmonary collateral vessels were completely occluded. Our study provides new data on the safety and efficacy of pulmonary embolisation with Amplatzer® vascular plugs, and its preference over coils in the embolisation of large vessels.