This is one of the most useful signs in chest radiology.] It describes the loss of a normal lung/soft tissue interface or "silhouette", caused by any pathology which either replaces or displaces normal air filled lung. This sign is commonly applied to heart, mediastinum, chest wall and diaphragm. Eg, right lower lobe consolidation may obliterate part or all of the right hemidiaphragm, but the right cardiac border would still be clearly defined due to normal aeration of the adjacent middle lobe.
One of the most useful signs in chest radiology is the silhouette sign. This was described by Dr. Ben Felson. The silhouette sign is in essence elimination of the silhouette or loss of lung/soft tissue interface caused by a mass or fluid in the normally air filled lung. In other words, if an intrathoracic opacity is in anatomic contact with, for example, the heart border, then the opacity will obscure that border. The sign is commonly applied to the heart, aorta, chest wall, and diaphragm. The location of this abnormality can help to determine the location anatomically.
Allibaby78 For the heart, the silhouette sign can be caused by an opacity in the RML, lingula, anterior segment of the upper lobe, lower aspect of the oblique fissure, anterior mediastinum, and anterior portion of the pleural cavity. This contrasts with an opacity in the posterior pleural cavity, posterior mediastinum, of lower lobes which cause an overlap and not an obliteration of the heart border. Therefore both the presence and absence of this sign is useful in the localization of pathology.
![Identifying which Lung Lobe a Puemonia is in [UndergroundMed]](http://i.ytimg.com/vi/4NNhGSXvbOU/mqdefault.jpg)
![Identifying which Lung Lobe a Puemonia is in [UndergroundMed]](/img/tr.png)
This is one of the most useful signs in chest radiology.] It describes the loss of a normal lung/soft tissue interface or "silhouette", caused by any pathology which either replaces or displaces normal air filled lung. This sign is commonly applied to heart, mediastinum, chest wall and diaphragm. Eg, right lower lobe consolidation may obliterate part or all of the right hemidiaphragm, but the right cardiac border would still be clearly defined due to normal aeration of the adjacent middle lobe.
Thanks a mil! For the 1st time, I truly understand the silhouette sign. Awesome vid!
this was amazing, thank you
Such an awesome explanation ma'am...Lots of Respect and Love India ❤️
Cristal clear explanation thank u
great job
Excellent teaching.
One of the most useful signs in chest radiology is the silhouette sign. This was described by Dr. Ben Felson. The silhouette sign is in essence elimination of the silhouette or loss of lung/soft tissue interface caused by a mass or fluid in the normally air filled lung. In other words, if an intrathoracic opacity is in anatomic contact with, for example, the heart border, then the opacity will obscure that border. The sign is commonly applied to the heart, aorta, chest wall, and diaphragm. The location of this abnormality can help to determine the location anatomically.
Take a moment to review the makeup of the mediastinal margins and the lobes of the lungs that interface with the mediastinum.
Allibaby78 For the heart, the silhouette sign can be caused by an opacity in the RML, lingula, anterior segment of the upper lobe, lower aspect of the oblique fissure, anterior mediastinum, and anterior portion of the pleural cavity. This contrasts with an opacity in the posterior pleural cavity, posterior mediastinum, of lower lobes which cause an overlap and not an obliteration of the heart border. Therefore both the presence and absence of this sign is useful in the localization of pathology.
Thank you so much. Very well understood
it helped me a lot! thank you so much
Thank You
ty
This vid was quite helpful
Now i can say i know
Thanks🙏
Just loved watching her explanation.
Can anyone tell me ma'am's name...or where can I find more of her videos.
so RLL consolidation can never be in touch with heart? how is that possible?