Most fatal cancerous tumours are allowed to grow because A) the individual's immune system is not functioning properly. B) they contain cells that are recognised as foreign by the immune system. C) the immune system did not evolve to protect against tumours. D) the cells are not immunogenic as they are recognised as self. E) although tumours are immunogenic, they mainly occur in tissues and so are not accessible to lysis by T_C cells.

Question

Quizplus · Accepted Answer

Cancerous tumors often consist of the body's own cells that have mutated, so the immune system recognizes them as self, not foreign, which allows them to grow unchecked.

Most Fatal Cancerous Tumours Are Allowed to Grow Because