hyperplastic
The term for abnormal development of tissue or organs is Dysplasia
Another name for abnormal swelling starting with 'N' is a Nodule.
Abnormal
An abnormality is something that is not normal in genetics or something that is 'out of this world'.
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Animal tissue
You're looking for the word elephantitis. (I know it sounds like a joke, but it's not.) Organomegaly is abnormal enlargement of an organ.
Neoplasm
Another word for scar tissue is "fibrous tissue." Scar tissue forms as part of the healing process after an injury, replacing normal tissue with a denser, less flexible material. This fibrous tissue can develop in response to cuts, surgeries, or other forms of trauma to the skin or internal organs.
Clonal Propagation
The procedure is called a biopsy. During a biopsy, a small piece of tissue is removed from the affected area and examined under a microscope to determine if there are any abnormal or cancerous cells present.
Care for and encourage the growth or development