In your case, since the doctors did not know you had cancer until the ablation was already done, they were not able to accurately determine the "stage" information because the ablation likely destroyed much of the tumor and also the lining of the uterus, which is needed to take measurements.
Kwimeko yakho, nanjengoko oogqirha babengazi ukuba unomhlaza de wabe wenziwa utyando lokususwa kwenwebu yesibeleko, abazange bakwazi ukuzifumana ngokuchanekileyo iinkcukacha "zesigaba" kuba olu tyando lwalitshabalalisa iqhuma kunye nenwebu yesizalo, zinto ezo zifunekayo xa kulinganiswa.