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| ==Eosinophilic gastritis== | | ==Eosinophilic gastritis== |
| ===General===
| | {{Main|Eosinophilic gastritis}} |
| *Rare.
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| ===Gross===
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| *+/-[[Gastric snakeskin appearance|Snakeskin appearance]].
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| DDx:
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| *[[Portal hypertensive gastropathy]].
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| ===Microscopic===
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| Features:
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| *Abundant [[eosinophil]]s -- >=127 eosinophils/mm<sup>2</sup>.<ref name=pmid21169993/>
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| **30 eosinophils/[[HPF]], if the field diameter of 1 HPF is 0.55 mm.
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| Notes:
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| *Normal range:<ref name=pmid21169993>{{Cite journal | last1 = Lwin | first1 = T. | last2 = Melton | first2 = SD. | last3 = Genta | first3 = RM. | title = Eosinophilic gastritis: histopathological characterization and quantification of the normal gastric eosinophil content. | journal = Mod Pathol | volume = 24 | issue = 4 | pages = 556-63 | month = Apr | year = 2011 | doi = 10.1038/modpathol.2010.221 | PMID = 21169993 }}</ref>
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| **<38 eosinophils/mm<sup>2</sup>.
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| ***Typically ~16 eosinophils/mm<sup>2</sup>.
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| *Mild eosinophilia is seen in:<ref name=pmid21169993/>
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| **[[Crohn's disease]] ~ 31 eosinophils/mm<sup>2</sup> (range: 0-203 eosinophils/mm<sup>2</sup>).
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| **[[Helicobacter gastritis]] ~ 25 eosinophils/mm<sup>2</sup> (range: 0-219 eosinophils/mm<sup>2</sup>).
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| ==Proton pump inhibitor effect== | | ==Proton pump inhibitor effect== |