What is dilatation?

Dilatation is the condition of being enlarged, occurring normally, artificially, or as a result of disease; said of a tubular structure, a cavity, or an opening.
gastric d. Acute distention of the stomach with fluid and air; commonly seen following surgery or trauma.
post-stenotic d. Enlargement of a blood vessel distal and adjacent to an abnormally constricted area of the vessel or a valve.

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