Eosinophilic 1121558 215145085 2008-05-26T22:22:41Z 130.225.107.134 Added pic [[Image:Basophil.jpg|thumb|A [[basophil granulocyte]] is surrouned by lightly staining eusinophilic [[erythrocyte]]s in an H&E staining.]] {{Mergeto|Eosin|date=July 2007}} {{main|Eosin}} '''Eosinophilic''' means ''loves eosin'', and refers to the [[stain]]ing of certain [[Biological tissue|tissues]], [[cell (biology)|cells]], or [[organelle]]s after they been washed with [[eosin]], a [[dye]]. Eosin is an [[acidic]] dye; thus, the structure being stained is [[Base (chemistry)|basic]]. Eosinophilic describes the appearance of cells and structures seen in [[histological section]]s that take up the staining dye [[eosin]]. This is a bright-pink dye that stains the cytoplasm of cells, as well as extracellular proteins such as [[collagen]]. Such eosinophilic structures are, in general, composed of [[protein]]. The stain eosin is usually combined with a stain called [[hematoxylin]] to produce a hematoxylin and eosin-stained [[section]] (also called an H&E, HE or H+E section). This is the most widely-used histological stain in medical diagnosis, for example, when a [[pathologist]] examines a [[biopsy]] of a suspected cancer, the biopsy will have been stained with H&E. Some structures seen inside cells are described as being eosinophilic, for example, [[Lewy body|Lewy bodies]], [[Mallory body|Mallory bodies]]. ==See also== * [[basophilic]] (affinity to [[Haematoxylin|hematoxylln]]) * [[Eosinophilia]] [[Category:Anatomical pathology]]