Is it possible to have normal tumor markers and normal liver functions while having a cancer?

hello ,
my dad had pain on the right side, in hospital we did an MRI and a x scan wich showed multiple (full) spots on liver.
his tumor marker blood tests are very normal.
cea, ca-19-9, psa, lipase, amylase, crp,ggt, gpt,rbc,cbc, billrubin all are normal, only the AFP level wa s little bit high ( 146) normal range is between 0-4.
a biopsy is scheduled next week because he took an aspirine pill.but we are affaid that this spots are caused by cancer.
is it possible to have normal tumor markers and normal liver functions while having a cancer?

thank u

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