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

Which of the following definitions best describes the instance 'pM1 (ovary)'?

A. A pathologic distant metastases stage for ovary according to AJCC 7th edition indicating that there is distant metastasis except peritoneal metastasis that is histologically confirmed.
B. A pathologic distant metastases stage for ovary according to AJCC 7th edition indicating that there is no distant metastasis.
C. A pathologic distant metastases stage for colon according to AJCC 7th edition indicating that there is clinical evidence of distant metastases by history, physical examination, imaging studies, or invasive procedures, but without microscopic evidence of the presumed distant metastases.
D. A pathologic distant metastases stage for ovary according to AJCC 7th edition indicating that there is distant metastasis except peritoneal metastasis based on clinical assessment.

Answer: A pathologic distant metastases stage for ovary according to AJCC 7th edition indicating that there is distant metastasis except peritoneal metastasis that is histologically confirmed.