Non-Hodgkin's lymphoma is a type of cancer that begins in your lymphatic system, which is part of the body's germ-fighting immune system.COVID-19:Advice,updatesandvaccineoptionsWeareopenforsafein-personcare.Learnmore:MayoClinicfactsaboutcoronavirusdisease2019(COVID-19)OurCOVID-19patientandvisitorguidelines,plustrustedhealthinformationLateston COVID-19vaccination bysite:ArizonapatientvaccinationupdatesArizona,FloridapatientvaccinationupdatesFlorida,RochesterpatientvaccinationupdatesRochesterandMayoClinicHealthSystempatientvaccinationupdatesMCHSSkiptositenavigationSkiptoContentThiscontentdoesnothaveanEnglishversion.ThiscontentdoesnothaveanArabicversion.SectionsforNon-Hodgkin'slymphomaSymptoms&causesDiagnosis&treatmentDoctors&departmentsCareatMayoClinicPrintOverviewLymphaticsystemOpenpop-updialogboxCloseLymphaticsystemLymphaticsystemYourbody'slymphaticsystemispartofyourimmunesystem,whichprotectsyouagainstinfectionanddisease.Thelymphaticsystemincludesyourspleen,thymus,lymphnodesandlymphchannels,aswellasyourtonsilsandadenoids.Non-Hodgkin'slymphomaisatypeofcancerthatbeginsinyourlymphaticsystem,whichispartofthebody'sgerm-fightingimmunesystem.Innon-Hodgkin'slymphoma,whitebloodcellscalledlymphocytesgrowabnormallyandcanformgrowths(tumors)throughoutthebody.Non-Hodgkin'slymphomaisageneralcategoryoflymphoma.Therearemanysubtypesthatfallinthiscategory.DiffuselargeB-celllymphomaandfollicularlymphomaareamongthemostcommonsubtypes.TheothergeneralcategoryoflymphomaisHodgkin'slymphoma.Advancesindiagnosisandtreatmentofnon-Hodgkin'slymphomahavehelpedimprovetheprognosisforpeoplewiththisdisease.Products&ServicesBook:MayoClinicFamilyHealthBook,5thEditionMayoClinicCancerCenterNewsletter:MayoClinicHealthLetter—DigitalEditionShowmoreproductsfromMayoClinicTypesChroniclymphocyticleukemiaCutaneousB-celllymphomaCutaneousT-celllymphomaFollicularlymphomaWaldenstrommacroglobulinemiaSymptomsSwollenlymphnodesOpenpop-updialogboxCloseSwollenlymphnodesSwollenlymphnodesOneofthemostcommonplacestofindswollenl