Task: Instance Description Understanding (ontology: Sciences/Computer_Science)

Which of the following definitions best describes the instance 'pT2a (ovary)'?

A. A pathologic primary tumor stage for ovary according to AJCC 7th edition indicating that the tumor has macroscopic peritoneal, metastatasis beyond pelvis, 2 cm or less in greatest dimension.
B. A pathologic primary tumor stage for ovary according to AJCC 7th edition indicating that the tumor is limited to one or both ovaries with capsule ruptured, tumor on ovarian surface, or malignant cells in ascites or peritoneal washings.
C. A pathologic primary tumor stage for ovary according to AJCC 7th edition indicating that the tumor has extension and/or implants on uterus and/or tube(s) and no malignant cells in ascites or peritoneal washings.
D. A pathologic primary tumor stage for ovary according to AJCC 7th edition indicating that the tumor has pelvic extension with malignant cells in ascites or peritoneal washings.

Answer: A pathologic primary tumor stage for ovary according to AJCC 7th edition indicating that the tumor has extension and/or implants on uterus and/or tube(s) and no malignant cells in ascites or peritoneal washings.