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*Criteria for number of eosinophils/area is '''''highly variable'''''; there is a 23X fold variation in published values and only 11% of studies actually define an area (most studies, embarassing, only give the number of eosinophils per "HPF")!<ref name=pmid17617209>{{cite journal |author=Dellon ES, Aderoju A, Woosley JT, Sandler RS, Shaheen NJ |title=Variability in diagnostic criteria for eosinophilic esophagitis: a systematic review |journal=Am. J. Gastroenterol. |volume=102 |issue=10 |pages=2300–13 |year=2007 |month=October |pmid=17617209 |doi=10.1111/j.1572-0241.2007.01396.x |url=}}</ref> | *Criteria for number of eosinophils/area is '''''highly variable'''''; there is a 23X fold variation in published values and only 11% of studies actually define an area (most studies, embarassing, only give the number of eosinophils per "HPF")!<ref name=pmid17617209>{{cite journal |author=Dellon ES, Aderoju A, Woosley JT, Sandler RS, Shaheen NJ |title=Variability in diagnostic criteria for eosinophilic esophagitis: a systematic review |journal=Am. J. Gastroenterol. |volume=102 |issue=10 |pages=2300–13 |year=2007 |month=October |pmid=17617209 |doi=10.1111/j.1572-0241.2007.01396.x |url=}}</ref> | ||
*The ''Foundation Series'' book<ref name=Ref_GLP19>{{Ref GLP|19}}</ref> says: "> 20/HPF" | *The ''Foundation Series'' book<ref name=Ref_GLP19>{{Ref GLP|19}}</ref> says: "> 20/HPF"; VL sees this definition as garbage, as "HPF" is not defined (see rant in the ''[[basics]]'' article). | ||
*The most commonly | *The most commonly reported cut points are 15, 20 and 24 eosinophils/HPF, without defining HPF.<ref name=pmid17617209/> | ||
*Most resident microscopes at the Toronto teaching hospitals have 22 mm eye pieces and have for their highest magnification objective a 40X. De facto, this means most people in Toronto are using the Liacouras ''et al.'' definition.<ref name=pmid16361045>{{cite journal |author=Liacouras CA, Spergel JM, Ruchelli E, ''et al.'' |title=Eosinophilic esophagitis: a 10-year experience in 381 children |journal=Clin. Gastroenterol. Hepatol. |volume=3 |issue=12 |pages=1198–206 |year=2005 |month=December |pmid=16361045 |doi= |url=}}</ref> | *Most resident microscopes at the Toronto teaching hospitals have 22 mm eye pieces and have for their highest magnification objective a 40X. De facto, this means most people in Toronto are using the Liacouras ''et al.'' definition.<ref name=pmid16361045>{{cite journal |author=Liacouras CA, Spergel JM, Ruchelli E, ''et al.'' |title=Eosinophilic esophagitis: a 10-year experience in 381 children |journal=Clin. Gastroenterol. Hepatol. |volume=3 |issue=12 |pages=1198–206 |year=2005 |month=December |pmid=16361045 |doi= |url=}}</ref> | ||
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