Can a brain tumour mimic the symptoms of cpt2 deficiency?

Question

My partner has malignant Hyperthermia and was also diagnosed with cpt2 deficiency.  Today he was diagnosed with a brain tumour and is awaiting results to discover if it is benign or malignant. He has had symptoms of cpt2 deficiency for some time however he has awake symptoms of malignant Hyperthermia.  The consultant is now questioning the cpt2 diagnosis and speculated that the tumour may be the cause of his symptoms.  He's 42 and had had leg cramps and high creatin kinase levels also. Thanks in advance