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Difference between revisions of "Soft tissue lesions"
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→Grading
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*<=50% of tumour = score 1. | *<=50% of tumour = score 1. | ||
*>50% of tumour = score 2. | *>50% of tumour = score 2. | ||
===MSH system=== | |||
Some pathologists at MSH use the system advocated by Costa et al..<ref name=pmid6692258>{{cite journal |author=Costa J, Wesley RA, Glatstein E, Rosenberg SA |title=The grading of soft tissue sarcomas. Results of a clinicohistopathologic correlation in a series of 163 cases |journal=Cancer |volume=53 |issue=3 |pages=530–41 |year=1984 |month=February |pmid=6692258 |doi= |url=}}</ref> | |||
====Scoring==== | |||
*Grade 1 = 1 point. | |||
*Grade 2 = 2 points. | |||
*Grade 3 = 3-4 points. | |||
====Components==== | |||
Points for each of the following: | |||
*Mitotic activity >= 6 / 10 HPF @ 40X - definition suffers from [[HPFitis]]. | |||
*Pleomorphism present. | |||
*Cellularity (cells/matrix) > 50%. | |||
*Necrosis >15% - microscopic (without targeting necrosis grossly) ''or'' grossly. | |||
=Adipocytic tumours= | =Adipocytic tumours= | ||