Difference between revisions of "Lung bleb"

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'''Lung blebs''', also '''pulmonary belbs''', are benign cystic [[lung]] lesions.<ref>{{Cite journal  | last1 = Ryu | first1 = JH. | last2 = Swensen | first2 = SJ. | title = Cystic and cavitary lung diseases: focal and diffuse. | journal = Mayo Clin Proc | volume = 78 | issue = 6 | pages = 744-52 | month = Jun | year = 2003 | doi = 10.4065/78.6.744 | PMID = 12934786 }}</ref>
[[Image:Lung bleb -- extremely low mag.jpg|thumb|right|Lung bleb. [[H&E stain]].]]
'''Lung bleb''', also '''pulmonary bleb''', are benign cystic [[lung]] lesions.<ref name=pmid12934786>{{Cite journal  | last1 = Ryu | first1 = JH. | last2 = Swensen | first2 = SJ. | title = Cystic and cavitary lung diseases: focal and diffuse. | journal = Mayo Clin Proc | volume = 78 | issue = 6 | pages = 744-52 | month = Jun | year = 2003 | doi = 10.4065/78.6.744 | PMID = 12934786 }}</ref>
 
''Lung bulla'' and ''lung bullae'' redirect to this article.


==General==
==General==
*Benign.
*Benign.
*Risk for [[pneumothorax]].
Clinical history:
*+/-[[Smoking]].


==Gross==
==Gross==
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*Bleb <=1 cm.
*Bleb <=1 cm.
*Bulla >1 cm, wall-thickness <= 1 mm.
*Bulla >1 cm, wall-thickness <= 1 mm.
 
==Microscopic==
==Microscopic==
Features:
Features:
*Thin-wall cystic lesions.
*Thin-wall cystic lesions.
**Blebs are entirely intrapleural.<ref>{{Ref PPP|787}}</ref>
**Blebs are entirely intrapleural.<ref>{{Ref PPP|787}}</ref>
DDx:
*[[Emphysema]].
*[[Lymphangioleiomyomatosis]] (LAM).
===Images===
<gallery>
Image:Lung bleb -- extremely low mag.jpg | Lung bleb - extremely low mag. (WC)
</gallery>


==Sign out==
==Sign out==
<pre>
<pre>
BLEBS, APEX OF THE LEFT LUNG, RESECTION:
Lung, Left Upper Lobe, Lobectomy:
- SQUAMOUS CELL CARCINOMA.
-- Margins clear.
-- See tumour summary.
- Two lymph nodes NEGATIVE for malignancy (0/2).
- Emphysematous changes and bullous disease/belbs.
</pre>
 
Note:
*Using "bullous disease/belbs" skates around the size criteria that differentiates ''belbs'' from ''bullae''.
 
===Block letters===
<pre>
BLEBS, APEX OF THE LEFT LUNG, WEDGE RESECTION:
- BENIGN LUNG BLEBS.
- BENIGN LUNG BLEBS.
- EVIDENCE OF PULMONARY HEMORRHAGE.
- ABUNDANT PIGMENTED AIRSPACE MACROPHAGES.
- NEGATIVE FOR MALIGNANCY.
- NEGATIVE FOR MALIGNANCY.
</pre>
</pre>


===Micro===
===Micro===
The sections show peripheral lung with large dilated air spaces surrounded by a thin walls
The sections show peripheral lung with large dilated air spaces, surrounded by thin walls
and lined by respiratory-type epithelium.  Siderophages are focally increased. Focal
and lined by respiratory-type epithelium.  Pigmented airspace macrophages are increased
fibrous pleural thickening is present.  No significant inflammation is present.
(smoker's macrophages). Focal fibrous pleural thickening is present.  No significant
inflammation is present.  No interstitial fibrosis is present.


The airspaces and lung interstitium distant from the abnormality is unremarkable.  There is
==See also==
no interstitial fibrosis.
*[[Birt–Hogg–Dubé syndrome]].


==References==
==References==

Latest revision as of 22:42, 18 November 2017

Lung bleb. H&E stain.

Lung bleb, also pulmonary bleb, are benign cystic lung lesions.[1]

Lung bulla and lung bullae redirect to this article.

General

Clinical history:

Gross

Cystic lesions:[2]

  • Bleb <=1 cm.
  • Bulla >1 cm, wall-thickness <= 1 mm.

Microscopic

Features:

  • Thin-wall cystic lesions.
    • Blebs are entirely intrapleural.[3]

DDx:

Images

Sign out

Lung, Left Upper Lobe, Lobectomy:
- SQUAMOUS CELL CARCINOMA.
-- Margins clear.
-- See tumour summary.
- Two lymph nodes NEGATIVE for malignancy (0/2).
- Emphysematous changes and bullous disease/belbs.

Note:

  • Using "bullous disease/belbs" skates around the size criteria that differentiates belbs from bullae.

Block letters

BLEBS, APEX OF THE LEFT LUNG, WEDGE RESECTION:
- BENIGN LUNG BLEBS.
- ABUNDANT PIGMENTED AIRSPACE MACROPHAGES.
- NEGATIVE FOR MALIGNANCY.

Micro

The sections show peripheral lung with large dilated air spaces, surrounded by thin walls and lined by respiratory-type epithelium. Pigmented airspace macrophages are increased (smoker's macrophages). Focal fibrous pleural thickening is present. No significant inflammation is present. No interstitial fibrosis is present.

See also

References

  1. Ryu, JH.; Swensen, SJ. (Jun 2003). "Cystic and cavitary lung diseases: focal and diffuse.". Mayo Clin Proc 78 (6): 744-52. doi:10.4065/78.6.744. PMID 12934786.
  2. Hansell, DM.; Bankier, AA.; MacMahon, H.; McLoud, TC.; Müller, NL.; Remy, J. (Mar 2008). "Fleischner Society: glossary of terms for thoracic imaging.". Radiology 246 (3): 697-722. doi:10.1148/radiol.2462070712. PMID 18195376.
  3. Leslie, Kevin O.; Wick, Mark R. (2004). Practical Pulmonary Pathology: A Diagnostic Approach (1st ed.). Churchill Livingstone. pp. 787. ISBN 978-0443066313.