|Year : 2021 | Volume
| Issue : 1 | Page : 67-69
Intradiaphragmatic extralobar pulmonary sequestration accompanying eventration of diaphragm
Rupesh Keshri, Ramdhani Yadav, Vinit Kumar Thakur, Digamber Chaubey, Vijayendra Kumar, Sandip Kumar Rahul
Department of Pediatric Surgery, IGIMS, Patna, Bihar, India
|Date of Submission||09-Jan-2021|
|Date of Decision||14-Mar-2021|
|Date of Acceptance||17-Mar-2021|
|Date of Web Publication||28-Jun-2021|
Sandip Kumar Rahul
Department of Pediatric Surgery, IGIMS, Patna, Bihar
Source of Support: None, Conflict of Interest: None
Pulmonary sequestrations (PSs) are rare anatomical aberrations of pulmonary development. We describe an unusual case of intradiaphragmatic extralobar PSs associated with eventration of the diaphragm on the left side. This association complicated the clinical presentation and intraoperative management of the patient.
Keywords: Diaphragm, eventration, pulmonary sequestration
|How to cite this article:|
Keshri R, Yadav R, Thakur VK, Chaubey D, Kumar V, Rahul SK. Intradiaphragmatic extralobar pulmonary sequestration accompanying eventration of diaphragm. J Indira Gandhi Inst Med Sci 2021;7:67-9
|How to cite this URL:|
Keshri R, Yadav R, Thakur VK, Chaubey D, Kumar V, Rahul SK. Intradiaphragmatic extralobar pulmonary sequestration accompanying eventration of diaphragm. J Indira Gandhi Inst Med Sci [serial online] 2021 [cited 2021 Sep 24];7:67-9. Available from: http://www.jigims.co.in/text.asp?2021/7/1/67/318928
| Introduction|| |
Intradiaphragmatic extralobar pulmonary sequestration (IDEPS) represents a unique subset of pulmonary sequestrations (PSs), which often increases the complexity of presentation and adds to the diagnostic dilemma. For definitive management, excision of a portion of diaphragm along with the lesion is necessary. Awareness about this unique anatomy is emphasized upon by presenting this unique case where it was also associated with a left diaphragmatic eventration.
| Case Report|| |
A 9-month-old male child presented with a history of respiratory distress associated with chest retractions and fever to the outpatient clinic for the last 2 weeks. He had a history of similar episodes in the past 6 months. On examination, he was tachycardic and tachypneic with a respiratory rate of 54/min. He was pale, anicteric, and weighed 4750 g. Abdomen was scaphoid and chest auscultation revealed decreased breath sounds in the left lower chest. On chest X-ray, left dome of the diaphragm appeared elevated and there was evidence of compression of ipsilateral lung and contralateral mediastinal shift [Figure 1]. Contrast-enhanced computed tomography of the chest and abdomen revealed left-sided eventration of the diaphragm with location of abdominal viscera in the thorax. There was also an evidence of a supradiaphragmatic mass adherent to the diaphragm with separate blood supply from the descending aorta but without any communication with the tracheobronchial tree, suggesting a diagnosis of extralobar PS [Figure 2].
|Figure 2: Contrast-enhanced computed tomography of the chest and abdomen (coronal section)|
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Considering the nature of the lesion and because its blood supply was from the aorta just below the diaphragm and also due to the presence of lots of bowel loops in the left thorax, it was decided to perform surgery via the abdominal route to reduce the contents and have better control of the vascular pedicle before excising the mass. After counseling the parents about the nature of the deformity and the surgical procedure, the child underwent exploration through a left subcostal incision. Stomach, several small intestinal bowel loops, and transverse colon were found at an abnormally high location in the left chest. After reducing them, an intact thin-walled flabby diaphragm was found on the left side, but there was a well-defined vascular pedicle entering the chest through a small defect medially in the diaphragm. This necessitated increasing the size of the defect to palpate an intrathoracic mass adherent to the left diaphragm partially and free from the lung lobes on the left side [Figure 3]. After ligation of the vascular supply to this structure, it was excised en mass along with a portion of diaphragm. The resulting defect along with the rest of the redundant diaphragm was repaired with interrupted prolene sutures [Figure 4]. The child did well in the postoperative period and was discharged on full oral diet on the 7th postoperative day. Biopsy revealed features of bronchoalveolar tissue in the excised mass, confirming a diagnosis of extralobar PS. The child has been asymptomatic on follow-up visits and after 12 months of surgical repair.
|Figure 3: Intraoperative picture showing intradiaphragmatic extralobar pulmonary sequestration and diaphragmatic eventration|
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|Figure 4: Intraoperative picture after lesion excision and repair of the left diaphragm|
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| Discussion|| |
Embryologically, lungs bud from the developing foregut. Abnormal budding and separation of such abnormal buds from the normal tracheobronchial pathway, by definition, lead to a PS. These anomalies have a separate systemic blood supply and can present with either an “intralobar” or “extralobar anatomy.”
Extralobar PS merits complete excision because they can often be confused with malignant masses or have mass effect over adjacent tissue, leading to associated symptoms. These lesions can also be the seat of repeated infections and lead to tissue adhesion, which may make it difficult to separate the sequestration tissue from the diaphragm. Hence, several investigators have recommended early surgery.
Extralobar PS can occur in thoracic or in extrathoracic sites such as abdomen., Such lesions can be approached through the thorax or abdomen, depending upon its location. However, lesions that are adherent to the diaphragm may be approached either way. However, other than approach to surgery, IDEPS leads to diagnostic difficulty at presentation., Several investigators have addressed these issues. Preoperative imaging may not always identify the location of PS as thoracic, abdominal, or intradiaphragmatic and therefore guide the approach to surgery. Hence, the use of minimal invasive techniques often resolves this dilemma and is worth considering.
Literature suggests that a significant portion of diaphragmatic eventration is associated with PS. However, such associations may have several anatomical variations and therefore need careful preoperative imaging to identify such variations in anatomy. Both intralobar and extralobar PSs have been described with eventration of diaphragm.,,
In our case, preoperative imaging showed features of left diaphragmatic eventration with displaced abdominal viscera along with a supradiaphragmatic extralobar PS with a conspicuous blood supply. We, therefore, had to deal with abnormal anatomy on either side of the diaphragm and therefore decided to have an abdominal approach followed by thoracic exploration via the diaphragm because any way diaphragm would need repair for eventration. Intraoperatively, finding the lesion with vascular supply from beneath the diaphragm and lesion being partially adhered to it, both could be dealt with precisely by the abdominal approach.
| Conclusion|| |
Diaphragmatic eventration and extralobar PS, both entities merit extensive radiological assessment to reveal the anatomic variations and guide the approach to surgery for appropriate management. IDEPS represents a unique subset where a portion of involved diaphragm needs to be excised along with PS.
Declaration of patient consent
The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.
Financial support and sponsorship
Conflicts of interest
There are no conflicts of interest.
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[Figure 1], [Figure 2], [Figure 3], [Figure 4]