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1、ABCofSweatGlandTumorsDebaPSarma,MDLakesideHospital,Omaha,NESweatglandanatomyDuctGlandDuct:PoreAcrosyringiumSyringiumStraightpartCylinderSpiralpartGland:CoiledglandsDuct:Pore:OpeningthroughepidermisAcrosyringium:Acro(endortop)+syringium(tubeorduct)Syringium:TubeorductStr
2、aight(Cylinder)partoftheductSpiralpartoftheductGland:CoiledglandsDuct:Pore:PoromaAcrosyringium:SyringocystadenomapapilliferumSyringium:SyringomaStraightpartoftheduct:CylindromaSpiralpartoftheduct:SpiradenomaGland:HidradenomaSweatglandtumorsBenign:AdenomaDuctalGlandularM
3、ixedMalignant:AdenocarcinomaDuctalGlandularMixedSweatglandtumorsBenign:Ductal:SyringocystadenomapapilliferumSyringomaHidrocystomaPoromaCylindromaSpiradenomaGlandular:HidradenomaMalignant:AdenocarcinomaSyringocystadenomapapilliferumEpidermisshowsacanthosisandpapillomatos
4、is.Cysticinvaginationswithpapillaryprojectionsextenddownwardfromtheepidermis.Thepapillaryprojectionsarelinedbytwolayersofcuboidalandcolumnarepithelialcells.Thestromaisinfiltratedbyanumerousplasmacells.SyringocystadenomapapilliferumSyringocystadenomapapilliferum(SP)isabe
5、nignadnexaltumor,mostcommonlylocatedonthescalporface,whichfrequentlyarisesfromanevussebaceus(NS).Epidermisshowsacanthosisandpapillomatosis.Cysticinvaginationswithpapillaryprojectionsextenddownwardfromtheepidermis.Thepapillaryprojectionsarelinedbytwolayersofcuboidalandco
6、lumnarepithelialcells.Luminalcellsmay?showdecapitationsecretion. Thestromaisinfiltratedbyanumerousplasmacells. Malformedsebaceousglandsandhairstructuresmaybepresent.SyringomaEpidermisisnormal.Upperdermisshowsnumeroussmallepithelialductsembeddedinscleroticstroma.Thewalls
7、oftheductsarelinedbytwolayersofcuboidalorflatepithelialcells.Ductallumencontainseosinophilic,amorphousdebris.Someductshaveelongatedtailsofepithelialcellsthatproduceacomma-shapedortadpoleappearance.Syringomaisabenignadnexalneoplasmformedbywell-differentiatedductalelement
8、sofsweatgland.Fourvariantsofsyringoma:(1)localizedform,(2)associatedwithDownsyndrome,(3)generalizedmultipleand
