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Well-differentiated squamous cell carcinoma, a type of carcinoma. H&E stain.

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

Large categories

An incomplete list

Small carcinoma

See also