11. Additionally, the definition of hamartoma versus neoplasms. 12. The most common hamartomas occur in the lungs. 13. Fatty tissue inside hamartomas will have a strongly negative value on the Hounsfield scale. 14. Cardiac rhabdomyomas are hamartomas composed of altered cardiac myocytes that contain large vacuoles and glycogen. 15. Gamma knife radiosurgery can be the treatment of choice when it comes to hypothalamic hamartomas . 16. Tumours of the small intestine include gastrointestinal stromal tumours, lipomas, hamartomas and carcinoid syndromes. 17. Certain patterns of calcification are reassuring, such as the popcorn-like appearance of hamartoma . 18. In HH patients, tissue called hamartoma develops near or intertwines with the hypothalamus early in pregnancy. 19. The hamartoma shows a variegated yellow and white appearance, which corresponds respectively to fat and cartilage. 20. Such annexes and the hypodermis can also be hypoplasic or, conversely, present aspects of hamartoma .