I have a lump on my thyroid and a biopsy revealed suspicious hürthle cells. I also have microscopic hematuria. Is there a connection?

Probably not. There is unlikely an association between hurtle cell atypia and microscopic hematuria. The hematuria should be worked up separately.
Unlikely but? Lump in thyroid with suspicious cells on biopsy equire action, probbaly surgery. Consult with your oncologist. This is a serious matter. What is your age, sex, family history, other lumps? . Microscopic hematuria should be investigated, . Is it infection, menstruation, cancer, trauma, exercise? Is it related to thyoid? Who knows? We need history. You need to be throughly investigated.