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

Which of the following definitions best describes the instance 'pT3a (ovary)'?

A. A pathologic primary tumor stage for ovary according to AJCC 7th edition indicating that the tumor is limited to the ovaries (one or both).
B. A pathologic primary tumor stage for ovary according to AJCC 7th edition indicating that the tumor has microscopic peritoneal metastasis beyond pelvis.
C. A pathologic primary tumor stage for ovary according to AJCC 7th edition indicating that the tumor involves one or both ovaries with microscopically confirmed peritoneal metastasis outside the pelvis and/or regional lymph node metastasis.
D. 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.

Answer: A pathologic primary tumor stage for ovary according to AJCC 7th edition indicating that the tumor has microscopic peritoneal metastasis beyond pelvis.