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Objective:TostudytheCTfindingsofprimarypulmonarylymphoma(PPL)andthecorrelationbetweentheCTfeatureswith pathology. Methods:WeretrospectivelyanalysistheCTfindingsandpathologyof72pretreatmentpatientswereseenwhohadpathologic diagnoseofPPLfrom2007to2015inourhospital. Results: 56patientswerediagnosedwithMALToma;8patientswerediagnosedwithdiffuselargeBcelllymphoma;3patients werediagnosedwithHodgkinslymphoma;1patientwasdiagnosedwithintravascularlymphoma,4patientswerediagnosedwith Tcelllymphoma.Weclassifiedthemintotwodivisions:MALT-omaandnon-MALToma,giventheirdifferentgradeofmalignancy. Patientswereclassifiedashavingfollowingfivepatterns:(1)nodularormass-likeinvolvementpatternwasseenin32patients(21MALTomas,11non-MALTomas);(2)lobarorsegmentalinvolvementpatternin7patients(6MALTomas,1non-MALTomas);(3)bronchovascularbundlesdistributionpatternin11patients(10MALTomas,1non-MALTomas);(4)DILDpatternin3 patients(2MALTomas,1non-MALToma);(5)mixedpatternin19patients(17MALTomas,2non-MALTomas).Bronchogramsign wasobservedin46patients(42MALTomas,4non-MALTomas);angiogramsignin38patients(36MALTomas,2non-MALTomas); halosignin14patients(7MALTomas,7non-MALTomas),crosslobarsignin14patients(12MALTomas,2non-MALTomas), butterflysignin4patients(4MALTomas,0non-MALToma)).Inaddition,bronchogramsign(P=0.037)andangiogramsign(P=0.01)occurredsignificantlymoreofteninMALTomathannon-MALToma;halosign(P=0.01)occurredmoreoftenin MALTomathanMALToma.ButterflysignisthemostsignificantCTfeatureofPPL. Conclusion:theCTperformanceofPPLisdiverse.Thespecificsigns,suchasairbronchogramsign,CTangiogramsign,halosign, butterflysignandcrossleafdistributioncontributetothedifferentialdiagnosis.ThedistributionofCTfeaturesindifferent pathologictypeofPPLhavediscrepancygivenmalignantgrade.