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Hemosiderin image of a kidney viewed under a microscope. The brown areas represent hemosiderin. Hemosiderin or haemosiderin is an iron-storage complex that is composed of partially digested ferritin and lysosomes. The breakdown of heme gives rise to biliverdin and iron. [1] [2] The body then traps the released iron and stores it as hemosiderin ...
Hemosiderin deposition in the brain is seen after bleeds from any source, including chronic subdural hemorrhage, cerebral arteriovenous malformations, cavernous hemangiomata. Hemosiderin depositionon on the surface of the brain and spinal cord due to chronic bleeding in the subarachnoid space is known as superficial siderosis .
Hemosiderin hyperpigmentation is pigmentation due to deposits of hemosiderin, and occurs in purpura, haemochromatosis, hemorrhagic diseases, and stasis dermatitis. [ 1 ] : 853 See also
The stain is an important histochemical stain used to demonstrate the distribution and amount of iron deposits in liver tissue, often in the form of a biopsy. [ 6 ] [ 7 ] Perls's procedure may be used to identify excess iron deposits such as hemosiderin deposits ( hemosiderosis ) and in conditions such as hereditary hemochromatosis . [ 8 ]
Histopathology of the liver, showing Kupffer cells with significant hemosiderin deposition (shown next to a hepatocyte with lipofuscin pigment, which is a common normal finding). H&E stain. Prussian blue iron staining, highlighting the hemosiderin pigment as blue. This finding indicates mesenchymal iron overload (within Kupffer cells and/or ...
Hemosiderinuria (syn. haemosiderinuria) is the presence of hemosiderin in urine. [1] It is often the result of chronic intravascular hemolysis, in which hemoglobin is released from red blood cells into the bloodstream in excess of the binding capacity of haptoglobin. The function of haptoglobin is to bind to circulating hemoglobin, thereby ...
Micrograph of the spleen showing darkly stained, spheroid Gamna-Gandy bodies (arrows) outside the vessel wall at the center. Also shown is diffusely scattered, brown, granular hemosiderin pigment (arrowheads), indicating previous hemorrhage (hematoxylin & eosin staining, 40x magnification).
Red blood cell extravasation and deposition of hemosiderin that follows clinically appear as hyperpigmentation, which can occur in a reticular distribution. It has also been proposed that the distribution of affected blood vessels—predominantly in the superficial subcutaneous plexus (found in the papillary dermis )—results in the net-like ...