brain radiation

i had a a-typical menigioma (large) in 1999. treated with brain surgery and 6wks radiation. can radiation cause hachimoto and what could be the long term effects from the radiation ?( i was diagnosed with hachimoto in 2006)
Thank you

[rumpled]

Hashimoto's is sometimes caused by radiation - but usually that exposure is to the neck, not to the head.

As for long term effects of radiation,
I found this:
"Radiation can damage normal cells, and sometimes this damage can have long-term effects. For example, radiation to the chest area may affect the lungs or heart. In some people this may cause scarring, which can affect a person’s ability to do things. Radiation to the abdomen (belly) or pelvis can lead to bladder, bowel, or sexual problems in some people. Radiation in certain areas can also lead to fluid build-up and swelling in parts of the body, a condition known as lymphedema.
Another thing some people worry about is a possible increased risk of getting a second cancer some time in the future. This increase in risk is small but real.

The link between radiation and cancer was noted many years ago in studies of atomic bomb survivors, workers exposed to radiation on their jobs, and patients treated with radiation therapy. Young women, for example, who had gotten whole body radiation for the treatment of Hodgkin disease were found to be at increased risk for breast cancer and other cancers later in life. (This treatment is no longer common.) And some cases of leukemia are also related to radiation exposure. The leukemia usually develops within a few years of exposure. The risk peaks about 5 to 9 years after the radiation exposure and then slowly declines. Other types of cancer after radiation exposure take much longer to develop. Most do not happen until at least 10 years after radiation exposure, and some are diagnosed 15 or more years later. "