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| ==Insular carcinoma== | | ==Insular carcinoma== |
| ===General===
| | {{Main|Insular thyroid carcinoma}} |
| Features:<ref name=pmid17665497>{{cite journal |author=Rufini V, Salvatori M, Fadda G, ''et al.'' |title=Thyroid carcinomas with a variable insular component: prognostic significance of histopathologic patterns |journal=Cancer |volume=110 |issue=6 |pages=1209–17 |year=2007 |month=September |pmid=17665497 |doi=10.1002/cncr.22913 |url=}}</ref>
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| *Rare - approximately 5% of all thyroid carcinomas.
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| *Thought to be a separate tumour from papillary thyroid carcinoma and follicular thyroid carcinoma with a focal insular pattern.
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| *Some lump this entity with papillary carcinoma, i.e. consider it a variant of papillary thyroid carcinoma.
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| ===Microscopic===
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| Features:<ref name=pmid17665497/>
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| *Islands of cells - '''key feature'''.
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| *Scant cytoplasm.
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| *Nuclei monomorphic and round.
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| DDx:<ref>Endo. fellow. 17 September 2009.</ref>
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| *[[Medullary thyroid carcinoma]].
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| *Poorly differentiated thyroid carcinoma.
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| ====Images====
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| www:
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| *[http://www.surgicalpathologyatlas.com/glfusion/mediagallery/media.php?f=1&s=20101021082634511&i=0&p=0 Insular carcinoma (surgicalpathologyatlas.com)].
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| *[http://www.bccancer.bc.ca/HPI/CE/cytotechnology/cytosleuthquiz/nongyne/NG16Hist.htm Insular carcinoma (bccancer.bc.ca)].
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| ==Follicular thyroid carcinoma== | | ==Follicular thyroid carcinoma== |