Difference between revisions of "Non-small cell lung carcinoma"

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Non-small cell lung carcinoma (view source)

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'''Non-small cell [[lung]] carcinoma''', abbreviated '''NSCLC''', is a malignant epithelial neoplasm of the lung that is ''not'' [[small cell carcinoma of the lung]]. 
#redirect [[Non-small cell lung cancer]]
 
It can be understood as a synonym for '''large cell carcinoma''' which is umbrella term that includes [[squamous cell carcinoma of lung]] and [[adenocarcinoma of the lung]].
 
==General==
*''Non-small cell lung carcinoma'' can be considered a [[waffle diagnosis]] and as such its use should be limited.
**It is preferable to be more specific if this is possible, i.e. call ''adenocarcinoma'' or ''squamous cell carcinoma''.
*Historically, it was sufficient to differentiate between [[small cell carcinoma of the lung|small cell]] and non-small cell carcinomas, as the treatment for all non-small cell lung carcinomas was the same.
 
==Microscopic==
Features:
*Large cells with abundant cytoplasm.
*+/-[[Nucleoli]].
*No stippled chromatin.
**This suggests the ''large cell variant of small cell carcinoma''.
 
DDx:
*[[Squamous cell carcinoma of the lung]].
*[[Adenocarcinoma of the lung]].
*[[Small cell carcinoma of the lung]].
*Large cell variant of [[small cell carcinoma of the lung]].
 
==IHC==
Sloan-Kettering algorithm - Rekhtman ''et al.'':<ref name=pmid21623384>{{Cite journal  | last1 = Rekhtman | first1 = N. | last2 = Ang | first2 = DC. | last3 = Sima | first3 = CS. | last4 = Travis | first4 = WD. | last5 = Moreira | first5 = AL. | title = Immunohistochemical algorithm for differentiation of lung adenocarcinoma and squamous cell carcinoma based on large series of whole-tissue sections with validation in small specimens. | journal = Mod Pathol | volume = 24 | issue = 10 | pages = 1348-59 | month = Oct | year = 2011 | doi = 10.1038/modpathol.2011.92 | PMID = 21623384 }}</ref>
{| class="wikitable sortable"
! TTF-1\p63
! p63 -ve (0% of cells)
! p63 +ve <50% of cells
! p63 +ve >=50% of cells
|-
| TTF-1 +ve >=50% of cells
| Adenocarcinoma
| Adenocarcinoma
| Adenocarcinoma
|-
| TTF-1 +ve <50% of cells
| Adenocarcinoma
| Adenocarcinoma
| Squamous carcinoma
|-
| TTF-1 -ve (0% of cells)
| Adenocarcinoma
| CK5/6 to determine
| Squamous carcinoma
|}
 
==See also==
*[[Lung tumours]].
 
==References==
{{Reflist|1}}
 
[[Category:Pulmonary pathology]]
Michael
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