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Cytologically Yours: Unknowns: 201310: Case 5

1,309 bytes added, 22:29, 13 November 2013
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==Clinical History==
46 yo male with a new left upper lobe nodule. He has a history of rheumatoid arthritis and welding. This is a FNA of the nodule.


==Cytology==
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CytologicallyYoursUnknowns201310-5-08.jpg|GMS
CytologicallyYoursUnknowns201310-5-09.jpg|Mucicarmine
</gallery>


===Resident Question===
* <spoiler text="Diagnosis">
Cryptococcus
</spoiler>
* <spoiler text="List three facts about this organism">
*Peripheral nodular lesions or multiple lesions with necrosis and granulomatous response
*Found in bird droppings and soil contaminated with bird droppings
*Variably sized yeast forms
**Can measure 4-6um and are round/oval
*Narrow based asymmetric budding
*Mucicarmine + halo
*GMS can highlight budding
*India Ink highlights capsule
</spoiler>

==Additional Teaching Points==
Mimics
*Pneumocystis
**Smaller
**Tight casts
*Candida
**Equal sized yeast
**No capsule
**Pseudohyphal structures

{{Cytologically Yours}}

[[Category:Unknowns]]
[[Category:Respiratory]]
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