However there was still no diagnosis - and Blaze was moved to Manchester Children's Hospital where another raft of tests, including a lymph node biopsy and a bone marrow test, were carried out.

BBC: Health

However, it is a good sign that the node does not bother him and that he has not been sick and that the tests that were done were all normal.

CNN: Should I worry about my son's swollen lymph node?

Other tests -- such as a Pap smear for cervical cancer or a lymph node biopsy for lymphoma -- are also safe.

CNN: Pregnant with cancer