an abnormal growth of normal cells

a rare benign tumour, which shows up on a chest x-ray as a large round shadow

A benign nodule / overgrowth of normal mature cells that are normally located in the affected part of the body, usually with one particular type of cell predominating. See also: Benign

abnormal growth or malformation of tissue normally found in that site

benign growth of disorganized cells from normal tissue that is self-limiting (stops itself from growing once the cells have reached maturity)

A focal malformation resembling a neoplasm, composed of an overgrowth of mature cells and tissues that normally occur in the affected area.

A tumor-like nodule consisting of a mixture of normal tissue usually present in an organ but existing in an unusual arrangement and/or an unusual site.

A benign (noncancerous) growth made up of an abnormal mixture of cells and tissues normally found in the area of the body where the growth occurs.

A hamartoma is a collection of abnormally shaped cells that multiplies excessively to form a benign tumor.