A hamartoma of the lung may contain a mixture of cartilage, connective tissue, and bronchial (windpipe in the throat) epithelium (membranous tissue covering internal organs).
Hamartomas are most frequently found in the skin which are overgrowths of blood vessels; however, they also occur in the lungs, heart, or the kidneys.3. A tumor resulting from new growth of normal tissues: The cells of the hamartoma grow spontaneously, reach maturity, and then do not reproduce; therefore, the growth is considered to be self-limiting and benign or not harmful.
The multiple hamartomas may appear in blood vessels, and in the lung and kidney.
Multiple hamartomas are not malignant, but they cause symptoms of an illness because of the spaces they occupy.