Difference between revisions of "Tumour budding"

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[[Image:Tumour budding in colorectal carcinoma - high mag.jpg|thumb|Tumour budding in [[colorectal carcinoma]]. [[H&E stain]]. (WC/Nephron)]]
'''Tumour budding''' refers to lone tumour cells ''or'' small clusters of tumour cells at the advancing front of a tumour.<ref name=pmid11952856>{{Cite journal  | last1 = Ueno | first1 = H. | last2 = Murphy | first2 = J. | last3 = Jass | first3 = JR. | last4 = Mochizuki | first4 = H. | last5 = Talbot | first5 = IC. | title = Tumour 'budding' as an index to estimate the potential of aggressiveness in rectal cancer. | journal = Histopathology | volume = 40 | issue = 2 | pages = 127-32 | month = Feb | year = 2002 | doi =  | PMID = 11952856 }}</ref>
'''Tumour budding''' refers to lone tumour cells ''or'' small clusters of tumour cells at the advancing front of a tumour.<ref name=pmid11952856>{{Cite journal  | last1 = Ueno | first1 = H. | last2 = Murphy | first2 = J. | last3 = Jass | first3 = JR. | last4 = Mochizuki | first4 = H. | last5 = Talbot | first5 = IC. | title = Tumour 'budding' as an index to estimate the potential of aggressiveness in rectal cancer. | journal = Histopathology | volume = 40 | issue = 2 | pages = 127-32 | month = Feb | year = 2002 | doi =  | PMID = 11952856 }}</ref>


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==Microscopic==
==Microscopic==
Definitions:
Definition in rectal carcinoma - based on international consensus:<ref name=pmid28548122>{{Cite journal  | last1 = Lugli | first1 = A. | last2 = Kirsch | first2 = R. | last3 = Ajioka | first3 = Y. | last4 = Bosman | first4 = F. | last5 = Cathomas | first5 = G. | last6 = Dawson | first6 = H. | last7 = El Zimaity | first7 = H. | last8 = Fléjou | first8 = JF. | last9 = Hansen | first9 = TP. | title = Recommendations for reporting tumor budding in colorectal cancer based on the International Tumor Budding Consensus Conference (ITBCC) 2016. | journal = Mod Pathol | volume = 30 | issue = 9 | pages = 1299-1311 | month = Sep | year = 2017 | doi = 10.1038/modpathol.2017.46 | PMID = 28548122 }}</ref>
*Tumour bud = 1-4 cell(s) -- at the tumour front.
*Tumour bud = 1-4 cell(s) -- at the tumour front.
*"High-grade budding" is >=10 tumour buds in a field of 0.385 mm<sup>2</sup>.<ref name=pmid11952856>{{Cite journal  | last1 = Ueno | first1 = H. | last2 = Murphy | first2 = J. | last3 = Jass | first3 = JR. | last4 = Mochizuki | first4 = H. | last5 = Talbot | first5 = IC. | title = Tumour 'budding' as an index to estimate the potential of aggressiveness in rectal cancer. | journal = Histopathology | volume = 40 | issue = 2 | pages = 127-32 | month = Feb | year = 2002 | doi =  | PMID = 11952856 }}</ref>
 
Grading:
*Low grade: 0-4 tumour buds.
*Intermediate grade: 5-9 tumour buds.
*High grade: >=10 tumour buds.  


Note:
Note:
*If the microscope has a 22 mm eye piece and...
*Assessed in a field area of 0.785 mm<sup>2</sup>.<ref name=pmid28548122/>
**A 20x objective, the field is approximately 0.950 mm<sup>2</sup> -- to match the buds/area -- it would be 24.68 buds/0.950 mm<sup>2</sup>.
**Microscopes with a 22 mm eye pieces typically have a 0.2376 mm*mm field area with the 40x objective; thus, three fields is 0.7128 mm*mm.
**A 40x objective, the field is approximately 0.238 mm<sup>2</sup> -- to match the buds/area -- it would be 6.17 buds/0.238 mm<sup>2</sup>.
**Tumour budding was '''previously''' assessed in a field of 0.385 mm<sup>2</sup>.<ref name=pmid11952856>{{Cite journal  | last1 = Ueno | first1 = H. | last2 = Murphy | first2 = J. | last3 = Jass | first3 = JR. | last4 = Mochizuki | first4 = H. | last5 = Talbot | first5 = IC. | title = Tumour 'budding' as an index to estimate the potential of aggressiveness in rectal cancer. | journal = Histopathology | volume = 40 | issue = 2 | pages = 127-32 | month = Feb | year = 2002 | doi =  | PMID = 11952856 }}</ref>
*"Tumour buds suspended in pools of mucin should not be counted" as per the consensus.<ref name=pmid28548122/>


DDx:
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Image: Tumour budding in colorectal carcinoma - very high mag.jpg | Tumour budding in CRC - very high mag. (WC)
Image: Tumour budding in colorectal carcinoma - very high mag.jpg | Tumour budding in CRC - very high mag. (WC)
</gallery>
</gallery>
== Sign out ==
<pre>
There are <5 tumour buds/0.785 mm*mm; this tumour has low grade tumour budding.
</pre>
<pre>
There are 5-9 tumour buds/0.785 mm*mm; this tumour has intermediate grade tumour budding.
</pre>
<pre>
There are >=10 tumour buds/0.785 mm*mm; this tumour has high grade tumour budding.
</pre>
===Alternate===
<pre>
The tumour is NEGATIVE for significant tumour budding (<5 buds/0.785 mm*mm).
</pre>


==See also==
==See also==
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*[[In-transit metastasis]].
*[[In-transit metastasis]].
*[[Tumour deposits]].
*[[Tumour deposits]].
*[[Worst pattern of invasion]].
*[[Spread through air spaces]].


==References==
==References==

Latest revision as of 15:50, 25 August 2023

Tumour budding in colorectal carcinoma. H&E stain. (WC/Nephron)

Tumour budding refers to lone tumour cells or small clusters of tumour cells at the advancing front of a tumour.[1]

General

Microscopic

Definition in rectal carcinoma - based on international consensus:[4]

  • Tumour bud = 1-4 cell(s) -- at the tumour front.

Grading:

  • Low grade: 0-4 tumour buds.
  • Intermediate grade: 5-9 tumour buds.
  • High grade: >=10 tumour buds.

Note:

  • Assessed in a field area of 0.785 mm2.[4]
    • Microscopes with a 22 mm eye pieces typically have a 0.2376 mm*mm field area with the 40x objective; thus, three fields is 0.7128 mm*mm.
    • Tumour budding was previously assessed in a field of 0.385 mm2.[1]
  • "Tumour buds suspended in pools of mucin should not be counted" as per the consensus.[4]

DDx:

Images

Sign out

There are <5 tumour buds/0.785 mm*mm; this tumour has low grade tumour budding.
There are 5-9 tumour buds/0.785 mm*mm; this tumour has intermediate grade tumour budding.
There are >=10 tumour buds/0.785 mm*mm; this tumour has high grade tumour budding.

Alternate

The tumour is NEGATIVE for significant tumour budding (<5 buds/0.785 mm*mm).

See also

References

  1. 1.0 1.1 Ueno, H.; Murphy, J.; Jass, JR.; Mochizuki, H.; Talbot, IC. (Feb 2002). "Tumour 'budding' as an index to estimate the potential of aggressiveness in rectal cancer.". Histopathology 40 (2): 127-32. PMID 11952856.
  2. Mitrovic, B.; Schaeffer, DF.; Riddell, RH.; Kirsch, R. (Oct 2012). "Tumor budding in colorectal carcinoma: time to take notice.". Mod Pathol 25 (10): 1315-25. doi:10.1038/modpathol.2012.94. PMID 22790014.
  3. Gujam, FJ.; McMillan, DC.; Mohammed, ZM.; Edwards, J.; Going, JJ. (Sep 2015). "The relationship between tumour budding, the tumour microenvironment and survival in patients with invasive ductal breast cancer.". Br J Cancer 113 (7): 1066-74. doi:10.1038/bjc.2015.287. PMID 26263482.
  4. 4.0 4.1 4.2 Lugli, A.; Kirsch, R.; Ajioka, Y.; Bosman, F.; Cathomas, G.; Dawson, H.; El Zimaity, H.; Fléjou, JF. et al. (Sep 2017). "Recommendations for reporting tumor budding in colorectal cancer based on the International Tumor Budding Consensus Conference (ITBCC) 2016.". Mod Pathol 30 (9): 1299-1311. doi:10.1038/modpathol.2017.46. PMID 28548122.