Eosinophilic leukocytes are present in the tissue infiltrate of various dermatologic disturbances. This study was undertaken in an attempt to determine whether there is any relationship between eosinophilia in the tissues and eosinophilia in the blood in some of the dermatologic diseases which cause tissue eosinophilia. In the microscopic study of routine dermatologic sections, at times numerous eosinophils with monolobed¹nuclei are found, while in other sections the eosinophils have nuclei which are bilobed or trilobed. In looking over the literature we found no mention of the relative importance of these two types of eosinophils. Little work apparently has been done to correlate the type of eosinophils with the disease entity. The earliest reference to the eosinophilic leukocyte is attributed to T. W. Jones,²who described coarsely granular cells in the blood as early as 1846. In 1861, Förster³mentioned similar cells in the blood; however,
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ROGER J. BURKHART (1944) studied this question.