1. Corpus Uteri Anatomic sites and subsites of the corpus uteri. Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, 2012. ©American Joint Committee on Cancer

2. Corpus Uteri Regional lymph nodes of the corpus uteri. Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, 2012. ©American Joint Committee on Cancer

3. Corpus Uteri For carcinomas T1a is defined as tumor limited to endometrium or that invades less than one-half of the myometrium. Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, 2012. ©American Joint Committee on Cancer

4. Corpus Uteri For carcinomas T1b is defined as tumor that invades one-half or more of the myometrium. Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, 2012. ©American Joint Committee on Cancer

5. Corpus Uteri For carcinomas T2 is defined as tumor that invades stromal connective tissue of the cervix but does not extend beyond uterus. Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, 2012. ©American Joint Committee on Cancer

6. Corpus Uteri For carcinomas T3a is defined as tumor that involves serosa and/or adnexa (direct extension or metastasis). T3b is defined as vaginal involvement (direct extension or metastasis) or parametrial involvement. Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, 2012. ©American Joint Committee on Cancer

7. Corpus Uteri For carcinomas T4 is defined as tumor that invades bladder mucosa and/or bowel mucosa (bullous edema (of the bladder) is not sufficient to classify a tumor as T4). Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, 2012. ©American Joint Committee on Cancer

8. Corpus Uteri For carcinomas N1 is defined as regional lymph node metastasis to pelvic lymph nodes. Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, 2012. ©American Joint Committee on Cancer

9. Corpus Uteri For carcinomas N2 is defined as regional lymph node metastasis to para-aortic lymph nodes, with or without positive pelvic lymph nodes. Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, 2012. ©American Joint Committee on Cancer

10. Corpus Uteri For carcinomas M1 is defined as distant metastasis (includes metastasis to inguinal lymph nodes, intraperitoneal disease, or lung, liver, or bone. It excludes metastasis to para-aortic lymph nodes, vagina, pelvic serosa, or adnexa). Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, 2012. ©American Joint Committee on Cancer

11. Corpus Uteri T1 for leiomyosarcoma and endometrial stromal sarcoma is defined as tumor limited to the uterus. T1a is defined as tumor 5 cm or less in greatest dimension. Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, 2012. ©American Joint Committee on Cancer

12. Corpus Uteri T1 for leiomyosarcoma and endometrial stromal sarcoma is defined as tumor limited to the uterus. T1b is defined as tumor more than 5 cm. Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, 2012. ©American Joint Committee on Cancer

13. Corpus Uteri T2 for leiomyosarcoma, endometrial stromal sarcoma, and adenosarcoma is defined as tumor that extends beyond the uterus, within the pelvis. T2a for sarcomas is defined as tumor that involves adnexa. Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, 2012. ©American Joint Committee on Cancer

14. Corpus Uteri T2b for leiomyosarcoma, endometrial stromal sarcoma, and adenosarcoma is defined as tumor that involves other pelvic tissues. Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, 2012. ©American Joint Committee on Cancer

15. Corpus Uteri T3 for leiomyosarcoma, endometrial stromal sarcoma, and adenosarcoma is defined as tumor that infiltrates abdominal tissues. T3a for sarcomas is defined as one site. Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, 2012. ©American Joint Committee on Cancer

16. Corpus Uteri T3 for leiomyosarcoma, endometrial stromal sarcoma, and adenosarcoma is defined as tumor that infiltrates abdominal tissues. T3b for sarcomas is defined as more than one site. Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, 2012. ©American Joint Committee on Cancer

17. Corpus Uteri T4 for leiomyosarcoma, endometrial stromal sarcoma, and adenosarcoma is defined as tumor that invades bladder or rectum. Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, 2012. ©American Joint Committee on Cancer

18. Corpus Uteri N1 for leiomyosarcoma, endometrial stromal sarcoma, and adenosarcoma is defined as regional lymph node metastasis. Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, 2012. ©American Joint Committee on Cancer

19. Corpus Uteri T1 for adenosarcoma is defined as tumor limited to the uterus. T1a is defined as tumor limited to the endometrium/endocervix. Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, 2012. ©American Joint Committee on Cancer

20. Corpus Uteri T1 for adenosarcoma is defined as tumor limited to the uterus. T1b is defined as tumor that invades to less than half of the myometrium. Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, 2012. ©American Joint Committee on Cancer

21. Corpus Uteri T1 for adenosarcoma is defined as tumor limited to the uterus. T1c is defined as tumor that invades more than half of the myometrium. Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, 2012. ©American Joint Committee on Cancer