Baba iyideyil salıgün pirostattan amaliyat olucak. Sen neden üzgünsün?

Father´s not well.  On Tuesday he will have surgery for (pirostat).  Why are you sad/sorry?

(looked up ´pirostat´ and the English is ´pyrostat´! - which means ´a thermostat for high temperatures´ so no idea what kind of surgery this is - sorry)

Thanks again for your help xx

Just had a thought!   It must be supposed to be ´prostat´!!!  How could I not see that the first time! 

(My excuse - I have a very bad cold and ´blocked´ head!)