Examples include: 1  Gliomas. 2  Meningiomas. 3  Acoustic neuromas (schwannomas). 4  Pituitary adenomas. 5  Medulloblastomas. 6  PNETs. 7  Germ cell tumors. 8  Craniopharyngiomas.
Depending on the internal quality of parts in water heater and whether you have followed maintenance schedule of draining and flushing the tank every year. You can expect a hot water heater to last between 8 to12 years. Water heater problems normally become self-evident: A hot water faucet fails to summon hot water, you see dripping or puddles near the water heater, or the tank emits strange gurgling or popping sounds.
Clue #1: Age. The older the water heater, the more likely it is to break down. As a general rule, a tank type water heater will last, on average 8 to 12 years. With proper maintenance and a little luck, you may be able to nearly double the lifespan of your water heater. But sometimes even with the best care, a water heater will need to be replaced after only a few years.