If an old microwave leaks radiation, can it cause cancer? i have been using an old microwave (over 20 years old) for almost 16 years. it might leak.

Noooo!: The radiation generated by the klystron tube is in a very tiny range which is the rotational frequency of water molecules. Hence it warms up food containing water. Dehydrated food does not warm up in a microwave oven! Radar works in same general range. Ionizing (X) radiation can lead to cancer because it can break chemical bonds and mess up things at a fundamental chemical level. Review your chemi