Hemorrhagic infiltration of the pulmonary artery connective sheath is a rare complication that may result in a case of acute aortic dissection,
Stanford type A (1,
The radiological interpretation of this finding may be of a diagnostic challenge. Multidetector computed tomography (MDCT) is the modality of choice for the diagnosis of this entity.
MDCT can also be used to monitor the evolution of this life threatening disease.
It is of great importance that radiologists can...
pulmonary arteries and bronchi along with the lymphatic channels are closely surrounded by a sheath of connective tissue.
This sheath is connected to the mediastinum (3). In aortic dissection,
especially Stanford type A,
this sheath loses its firm tightness,
resulting in the formation of a hemomediastinum (3).
At this point,
this condition can lead to many complications.
hemorrhagic extravasations into an extrapleural route can create a 'apical cap'.
Imaging findings OR Procedure details
Materials and Methods Literature review: A literature review using PUBMED ('aortic dissection' infiltration of the lung parenchyma ',' interstitial pulmonary hemorrhage ') has led to the identification of seven reported cases,
illustrated by computed tomography (1,
and 9). Our radiological cases: Case series of twelve aortic dissections with hemorrhagic infiltration of the aortopulmonary sheath,
from five academic centers was reported from 2008 to 2010.
The medical records were...
Proposed mechanism The suggested mechanism to explain this entity involves dissection with contained rupture of the ascending aorta and the formation of a hemorrhagic infiltration limited to the extravasation of aortic blood along the aortopulmonary connective sheath (usually a virtual space in a normal patient),
with consequent compression of the pulmonary arteries.
This vascular compression would result in distal edema with hemorrhage of the lung parenchyma. Conclusion Hemorrhagic...
Interstitial pulmonary hemorrhage from mediastinal hematoma secondary to aortic rupture.
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