The<unk> , or<unk>  effect, is the presence of DNA in necrotic venules. It can occur in small cell carcinomas and in some high-grade malignant neoplasms. The effect is well known in diagnostic surgical pathology. The phenomenon is named after the pathologist, John G.<unk> .<unk>  was able to correctly characterize the effect as due to DNA; it had been thought previously but incorrectly to be calcium. Necrosis results in the release of cellular DNA, which adheres in patches to the walls of blood vessels, showing as intensely basophilic material on hematoxylin-eosin stain. The<unk>  is distinguished from the similar basophilic hematoxylin body.
Azzopardi phenomenon
Dawn phenomenon
Tullio phenomenon
Ashman phenomenon
Marcus Gunn phenomenon
Foldscope
Renbök phenomenon
Gallavardin phenomenon