I have used the Okajima Technique successfully, to demonstrate that large round inclusions in the cytoplasm of large mysterious cells in a skin lesion were in fact phagocytized red blood cells, based on hemoglobin staining, thereby identifying the mystery cells as parasitic amebae.  It's a pretty simple technique, and while I have not used it much, it worked well on the couple of occasions when I did use it. I can send it if you don't have it.



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