انا عندي لديها غدة صدرية دهنية وهي حامل في الشهر الاول ها كيس ماء ايضا

I assume the "chest mass" you are talking about is a breast mass. Those are better managed by a breast surgeon, I am not sure how far in the investigations you sister had been so far? In addition, I would like to assume that the "water cyst" that you talked about is cyst on the ovary! , it is most likely the cyst that develop in the early weeks of pregnancy, they usually resolve after the first few weeks, therefore you don’t need to worry about them, certainly we have to be aware of the not uncommon complications which may happen in such cysts, I am sure the doctor will keep an eye on the cyst. I am sorry my answers are limited by the limited information you provided in your questions. Regards