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| ==Hibernoma== | | ==Hibernoma== |
| ===General===
| | {{Main|Hibernoma}} |
| *Consists of ''brown fat'' (present in the infants to generate heat).<ref name=Ref_WMSP605>{{Ref WMSP|605}}</ref>
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| *Benign.
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| *Usually asymptomatic.<ref name=pmid19131775>{{cite journal |author=Ahmed SA, Schuller I |title=Pediatric hibernoma: a case review |journal=J. Pediatr. Hematol. Oncol. |volume=30 |issue=12 |pages=900–1 |year=2008 |month=December |pmid=19131775 |doi=10.1097/MPH.0b013e318184e6dd |url=}}</ref>
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| Epidemiology:
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| *Young adults.
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| ===Gross===
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| *Well-circumscribed.
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| *Lobulated and light-brown on sectioning.
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| ===Microscopic===
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| Features:<ref name=pmid9537018>{{cite journal |author=Chen DY, Wang CM, Chan HL |title=Hibernoma. Case report and literature review |journal=Dermatol Surg |volume=24 |issue=3 |pages=393–5 |year=1998 |month=March |pmid=9537018 |doi= |url=}}</ref>
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| *Large polygonal/oval cells:
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| **Nucleus - central & small.<ref>[http://www.pathconsultddx.com/pathCon/diagnosis?pii=S1559-8675(06)70271-6 http://www.pathconsultddx.com/pathCon/diagnosis?pii=S1559-8675(06)70271-6]</ref>
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| ***Nucleoli typically prominent.<ref>[http://surgpathcriteria.stanford.edu/softfat/hibernoma/ http://surgpathcriteria.stanford.edu/softfat/hibernoma/]</ref>
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| **Cytoplasm - multivacuolated, oval, eosinophilic, granular.
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| *+/-Prominent blood vessels, central.<ref>URL: [http://radiographics.rsna.org/content/24/5/1433.full http://radiographics.rsna.org/content/24/5/1433.full]. Accessed on: 11 February 2013.</ref>
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| DDx:
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| *Reaction to silicone implant.
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| Image:
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| *[http://en.wikipedia.org/wiki/File:Hibernoma1.jpg Hibernoma - high mag. (WC)].
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| *[http://commons.wikimedia.org/wiki/File:Hibernoma3.jpg Hibernoma - low mag. (WC)].
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| ==Atypical lipomatous tumour== | | ==Atypical lipomatous tumour== |