|Year : 2020 | Volume
| Issue : 1 | Page : 62-63
Right middle and lower lobe collapse by an ascending thoracic aortic aneurysm
Darpanarayan Hazra, Joanna Preritha Fernandes, Aparna Lohanathan, Kundavaram Paul Prabhakar Abhilash
Department of Emergency Medicine, Christian Medical College, Vellore, Tamil Nadu, India
|Date of Submission||08-Aug-2019|
|Date of Decision||30-Aug-2019|
|Date of Acceptance||31-Aug-2019|
|Date of Web Publication||03-Feb-2020|
Dr. Darpanarayan Hazra
Department of Emergency Medicine, Christian Medical College, Vellore - 632 004, Tamil Nadu
Source of Support: None, Conflict of Interest: None
We report a case of a 60-year-old male patient who presented to the Emergency Department of Christian Medical College, Vellore, with a history of right-sided pleuritic chest pain. Thoracic aortic aneurysms are usually asymptomatic unless any complication occurs (e.g., dissection, rupture) or an imaging study has been performed demonstrating the aneurysm. Chest radiograph of this patient showed collapse of right main bronchus due to an aneurysm, which to our knowledge has not been previously reported in literature.
Keywords: Aneurysm, aortic aneurysm, thoracic aortic aneurysm
|How to cite this article:|
Hazra D, Fernandes JP, Lohanathan A, Abhilash KP. Right middle and lower lobe collapse by an ascending thoracic aortic aneurysm. Curr Med Issues 2020;18:62-3
|How to cite this URL:|
Hazra D, Fernandes JP, Lohanathan A, Abhilash KP. Right middle and lower lobe collapse by an ascending thoracic aortic aneurysm. Curr Med Issues [serial online] 2020 [cited 2020 Jul 6];18:62-3. Available from: http://www.cmijournal.org/text.asp?2020/18/1/62/277519
| Introduction|| |
Thoracic aortic aneurysms are relatively uncommon compared to abdominal aortic aneurysms. Aortic aneurysms are commonly associated with atherosclerosis. Aneurysms may be detected incidentally through manifestation of local mass effects or systemic symptoms. Rarely presentation is with acute rupture. Mediastinal masses may mimic aortic aneurysms, therefore CT Angiogram and MR Angiogram are the modalities of choice to image this condition. Most patients with thoracic aortic aneurysms are asymptomatic at the time of diagnosis, because the aneurysms are typically discovered incidentally on imaging studies ordered for other indications. When thoracic aortic aneurysms are large, patients may suffer a local mass effect, such as compression of the trachea or mainstem bronchus (causing cough, dyspnea, wheezing, or recurrent pneumonitis), compression of the esophagus (causing dysphagia), or compression of the recurrent laryngeal nerve (causing hoarseness). Surgery is offered when the risk of rupture is greater than the risk of the operation.
| Case Report|| |
A 60-year-old male patient presented to the Emergency Department of Christian Medical College, Vellore, with a history of right-sided pleuritic chest pain for 1 month and progressively worsening breathlessness for 3 days. His chest radiograph [Figure 1] was suggestive of right middle and lower lobe collapse with a left pleural effusion. The initial differential was a mass lesion due to a malignancy or lymph node enlargement causing collapse.
A computed tomographic scan of the chest [Figure 2] revealed a 12.5 cm × 12.3 cm partially thrombosed fusiform aneurysm arising from the ascending aorta causing mass effect on the right main bronchus with features of an impending rupture. The patient was diagnosed as a Stanford A type, of ascending thoracic aortic aneurysm (TAA), for which he was advised surgery. The patient was not willing to undergo surgery. He was initiated on beta-blockers with an angiotensin receptor antagonist to target a systolic blood pressure between 110 and 120 mmHg. He was followed up 1 month later in the medicine outpatient department with no new complaints. Thereafter, the patient was lost to follow-up.
| Discussion|| |
The incidence of TAA is estimated to be 5.9–10.4 per 100,000 person-years. Knowledge of the risk factors, pathophysiology, and natural history of aortic aneurysm (AA) is important in clinical decision-making. AAs are classified into TAA, abdominal AA, and thoracoabdominal AA depending on the location. TAA represents approximately one-third of AA admissions, with the remaining cases related to abdominal aortic disease., TAAs are usually asymptomatic unless any complication occurs (e.g., dissection, rupture) or an imaging study has been performed demonstrating the aneurysm. Complications of TAA, such as thoracic aortic dissection, may initially be attributed to another cause; thus, a high index of suspicion must be maintained in patients who present with chest pain. Ascending TAAs may be detected incidentally on a chest radiograph, that may have been done for other indications. When these patients become symptomatic, it is either due to a rupture, dissection, or compression by the aneurysm. Chest radiograph findings commonly documented in literature are widening of the mediastinum, left pleural effusion (due to rupture of the aneurysm), and cardiomegaly. The compression of the left main bronchus in TAA although uncommon has been reported in literature, especially in trauma cases. The compression of the right main bronchus due to an aneurysm, though anatomically possible, to our knowledge, has not been previously reported in literature.
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]