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

CNN: Pregnant with cancer

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

To determine whether your melanoma has spread to nearby lymph nodes, your surgeon may use a procedure known as a sentinel node biopsy.

CNN: Melanoma