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→Cellular Inclusions
===Cellular Inclusions===
===Cellular Inclusions===
====Viruses====
* Either in the nucleus or cytoplasm.
====Storage Products====
* Due to '''hereditary storage diseases''' in which there is a missing or defectivecellular enzyme. There are many types known in domestic animals.
** Break down/ build up of intracellular substances is halted.
*** The intermediate substance accumulates in the lysosomes.
** Affects all tissues
*** The central nervous system is particularly vulnerable.
* Due to '''age'''
** Lysosomes will accumulate non-degradable products
*** E.g. lipofuscin - the 'ageing' or 'wear and tear pigment'.
**** Cmmonly seen in middle-aged cats in the hepatocytes nearest the centrilobular veins.
====Intracellular Bacteria====
* For example, [[Mycobacteria spp.|''Mycobacterium tuberculosis'']] in macrophages.
====Protein Accumulation====
* In the renal tubular epithelium.
* Occurs when there is leakage of protein out through a damaged glomerulus.
==Necrosis==
==Necrosis==