YOU SAID:

hi im dying ive had cancer since i turned seven

INTO JAPANESE

私は7歳になってからこんにちはim dying ive癌があった

BACK INTO ENGLISH

I have had hi dying ive cancer since I was 7 years old

INTO JAPANESE

私は7歳の頃から、死にかけているような癌にかかっています

BACK INTO ENGLISH

I have a cancer that is dying from the age of 7

INTO JAPANESE

私は7歳で亡くなっている癌があります

BACK INTO ENGLISH

I have a cancer that died at the age of 7

INTO JAPANESE

私は7歳で亡くなった癌があります

BACK INTO ENGLISH

I have a cancer that died at the age of 7