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[[Image:Well differentiated squamous cell carcinoma.jpg|thumb|300px|Well-differentiated | [[Image:Well differentiated squamous cell carcinoma.jpg|thumb|300px|Well-differentiated [[squamous cell carcinoma]], a type of carcinoma.[[H&E stain]].]] | ||
'''Carcinoma''' is an epithelial-derived [[malignancy]]. | '''Carcinoma''' is an epithelial-derived [[malignancy]]. | ||
'''Carcinoma not otherwise specified''', also '''carcinoma NOS''', is a non-specific malignant diagnosis that without further information is not very useful for treatment decisions. | |||
Generally speaking, pathologists try to be more specific when this is possible. | |||
Carcinomas where the origin, i.e. primary site, is not known are ''cancers of unknown primary''; this is dealt with separately in the article ''[[cancers of unknown primary]]''. | |||
==Types of carcinoma== | ==Types of carcinoma== |
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