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| ==Hairy cell leukemia== | | ==Hairy cell leukemia== |
| [[File:Bone marrow infiltration by hairy cell leukaemia.jpg|thumb|High power magnification of a bone marrow trephine showing infiltration by hairy cell leukaemia.]] | | See [[Hairy cell leukemia]] |
| *Abbreviated ''HCL''.
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| ===General===
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| *Name comes from appearance on blood smear - cell hairy.
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| *Do to the biology, ''dry taps'' are common.<ref name=pmid22499303>{{Cite journal | last1 = Galani | first1 = KS. | last2 = Subramanian | first2 = PG. | last3 = Gadage | first3 = VS. | last4 = Rahman | first4 = K. | last5 = Ashok Kumar | first5 = MS. | last6 = Shinde | first6 = S. | last7 = Mahadik | first7 = S. | last8 = Ansari | first8 = R. | last9 = Sengar | first9 = M. | title = Clinico-pathological profile of Hairy cell leukemia: critical insights gained at a tertiary care cancer hospital. | journal = Indian J Pathol Microbiol | volume = 55 | issue = 1 | pages = 61-5 | month = | year = | doi = 10.4103/0377-4929.94858 | PMID = 22499303 }}</ref>
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| Clinical:<ref>URL: [http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=cmed&part=A34022 http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=cmed&part=A34022]. Accessed on: 20 August 2010.</ref>
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| *Pancytopenia.
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| *Splenic enlargement.
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| *No lymphadenopathy.
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| *Good prognosis (with treatment), though (likely) not curable.
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| ===Gross===
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| Features:<ref name=Ref_PCPBoD8_326>{{Ref PCPBoD8|326}}</ref>
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| *Huge beefy red [[spleen]].
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| **Red as white pulp obliterated.
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| ===Microscopic===
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| Features:<ref>URL: [http://emedicine.medscape.com/article/200580-diagnosis http://emedicine.medscape.com/article/200580-diagnosis]. Accessed on: 18 August 2010.</ref>
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| *Small cells (10-20 micrometers) with "Fried egg"-like appearance:
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| **Well-demarcated fuzzy cell borders,
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| **Clear/whispy cytoplasm and,
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| **Central round nucleus.
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| ***Peri-nuclear clearing ("water-clear rim"<ref>URL: [http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=cmed&part=A34022 http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=cmed&part=A34022]. Accessed on: 20 August 2010.</ref>) -- '''key feature'''.
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| DDx:
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| *[[Hepatosplenic T-cell lymphoma]].
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| ====Images====
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| <gallery>
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| Image:Hairy_cell_leukemia.jpg | HCL - blood film. (WC)
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| Image:Hairy cell leukemia - high mag.jpg | HCL - high mag. (WC)
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| Image:Hairy_cell_leukemia_-_very_high_mag.jpg | HCL - very high mag. (WC)
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| </gallery>
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| www:
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| *[http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=cmed&part=A34022&rendertype=figure&id=A34027 HCL - bone marrow (nlm.nih.gov)] from [http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=cmed&part=A34022 Holland-Frei Cancer Medicine (nlm.nih.gov)].
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| *[http://path.upmc.edu/cases/case240.html HCL - several images (upmc.edu)].
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| *[http://path.upmc.edu/cases/case691.html HCL - another case with several images (upmc.edu)].
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| *[http://webpathology.com/image.asp?case=380&n=3 HCL in the spleen (webpathology.com)].
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| ===IHC===
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| Features:<ref>URL: [http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=cmed&part=A34022&rendertype=table&id=A34029 http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=cmed&part=A34022&rendertype=table&id=A34029]. Accessed on: 20 August 2010.</ref>
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| *CD20 +ve, CD25 +ve, CD103 +ve.
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| *CD5 -ve.
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| Flow cytometry:
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| *CD19 +ve, CD11c +ve, FMC7 +ve.
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| ==B cell small lymphocytic lymphoma/chronic lymphocytic leukemia== | | ==B cell small lymphocytic lymphoma/chronic lymphocytic leukemia== |