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

Which of the following definitions best describes the instance 'G4: Undifferentiated'?

A. A histologic grade according to AJCC 7th edition indicating that the tumor cells are moderately differentiated and reflect an intermediate grade.
B. A histologic grade according to AJCC 7th edition indicating that the tumor cells and the organization of the tumor tissue appear close to normal.
C. A histologic grade according to AJCC 7th edition indicating that the tumor cells are poorly differentiated and do not look like normal cells and tissue.
D. A histologic grade according to AJCC 7th edition indicating that the tumor cells are undifferentiated and do not look like normal cells and tissue.

Answer: A histologic grade according to AJCC 7th edition indicating that the tumor cells are undifferentiated and do not look like normal cells and tissue.