Hello and welcome to HCM,
It would have been more helpful if you had mentioned the type and site of cancer your relative is suffering.
Anyways, a number of cancers involve/ infiltrate the bone marrow
like breast cancer
, prostatic cancer, lung cancer
When a cancer spreads to a distant site away from the main site, it is called a metastatic cancer.
Meatstasis increases the stage of the disease.
stage is divided into four stages.
Bone marrow involvement is am omnious sign and stage four. It indicates that the tumor has spread to the bone marrow and can appear the blood.
You report suggests a normal functioning marrow free from tumor invasion.
Thanks and take care.
Dr Shailja P Wahal