Most womb cancers develop from cells in the lining of the womb (the endometrium). Because of this they are called endometrial cancers.

Endometrial womb cancer

Most womb cancers develop from cells in the lining of the womb (the endometrium). Because of this they are called endometrial cancers. There are different types of endometrial cancer:

  • endometrioid cancer
  • serous endometrial carcinoma (also called uterine serous carcinoma)
  • carcinosarcoma (these cancers are not sarcomas, despite their name)
  • clear cell carcinoma
  • mucinous carcinoma
  • mixed cell endometrial cancer.

Some doctors describe endometrial cancers as type 1 or type 2.

Type 1 endometrial cancers

These cancers are slow growing and are usually diagnosed at an early stage. They include grade 1 and grade 2 endometrioid cancers and all mucinous cancers.

Type 2 endometrial cancers

These cancers are always high-grade (grade 3) and tend to grow more quickly. They include:

  • serous endometrial carcinoma
  • carcinosarcoma
  • clear cell carcinoma
  • grade 3 endometrioid cancers
  • mixed cell endometrial cancers.