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

Which of the following definitions best describes the instance 'pT1a (ovary)'?

A. A pathologic primary tumor stage for ovary according to AJCC 7th edition indicating that the tumor involves one or both ovaries with pelvic extension.
B. A pathologic primary tumor stage for ovary according to AJCC 7th edition indicating that the tumor has peritoneal metastasis beyond pelvis, more than 2 cm in greatest dimension and/or regional lymph node metastasis.
C. A pathologic primary tumor stage for ovary according to AJCC 7th edition indicating that the tumor has extension to other pelvic tissues 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 is limited to one ovary; capsule intact, no tumor on ovarian surface and no malignant cells in ascites or peritoneal washings.

Answer: A pathologic primary tumor stage for ovary according to AJCC 7th edition indicating that the tumor is limited to one ovary; capsule intact, no tumor on ovarian surface and no malignant cells in ascites or peritoneal washings.