@angg11923
Let me first say that hearing the word "cancer" in a diagnosis is very traumatic. I remember well when the gynecologist told me that my biopsy (done through dilation and curettage or D&C) showed endometrial cancer. I was in shock and could barely breathe.

I hope I can help you understand your diagnosis.

I have some questions for you. You had an ultrasound. Did a medical doctor tell you that this is "endometriosis cancer"? Did you talk with the radiologist who reads the scan? Endometriosis isn't cancer.

Here is information from Mayo Clinic that explains what endometriosis is and how it is diagnosed.

Endometriosis:

-- https://www.mayoclinic.org/diseases-conditions/endometriosis/symptoms-causes/syc-20354656

Endometrial cancer is diagnosed with a biopsy where endometrial lining of the uterus is removed and sent to a pathologist (a medical doctor) to put under a microscope and diagnose. An ultrasound, like you had, is a first step for the radiologist to view the uterus and see if there are any abnormalities such as a thick endometrial lining in the uterus (that's what my ultrasound showed). Then a biopsy is done.

Endometrial cancer:
https://www.mayoclinic.org/diseases-conditions/endometrial-cancer/symptoms-causes/syc-20352461
Does this explanation help?

I hope the doctor will help you to understand your diagnosis and make plan with you to treat you.

Do you have an appointment with your doctor to talk over your diagnosis?