THEHEMATOLOGICALSYSTEMISRELATIVELY INACCESSIBLECLINICALLY,

unlikemostothersystems.Itisinterestingtoplaceclinicalentitiesinhematology,asweknowthemtoday,intoahistoricalperspective andtonotehowfewofthesewererecognizedassuch beforetheadventofmodernbloodtests.Someexamples areasfollows