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Neoplasia refers to the growth of abnormal cells. When those cells form a mass, that mass is called "neoplasm".

In neoplasia the cells are produced uncontrollably, meaning, more of them are produced as needed, and they have less time to differentiate (mature) into proper, functional cells.

Neoplasm are considered to be either benign (not malignant), or malignant (cancerous)

Benign neoplasm:

- the cells produced more slowly,

- have more time to differentiate, (cells are more able to function)

- the proliferation (cell production) might even stop or revert

- the formed mass could be enclosed in a capsule, (which could prevent spreading = metastasis)

- might only be one mass.

Malignant neoplasm:

- cells produced rapidly,

- have less time to differentiate (cells can't function)

- does not have a capsule,

- the mass invades the neighbouring tissues

- cells can break off, carried away by blood

- break off cell stops at other part of the body, where it starts an another mass (secondary tumour).

Haematologic cancers (cancers affecting blood cells) do not form a mass, the blood cells would incontrolably proliferate.

While the nature of the neoplasm could be differentiated as above, many health professionals do not regard neoplasm as "non-cancerous".

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15y ago

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