benign liver lesion

I have a liver lesion that was diagnosed about 3 years ago which is suspected to be from use of birth control pills.  I stopped them immediately and had a follow up CT scan in 6 months.  The lesion had not grown but had not really shrunk either.  I was referred to a liver surgeon (Dr. Espar in Chicago) and I was given the option of surgical resection.  I declined and decided to monitor the lesion through routine MRIs (CT scans were ruled out due to high doses of radiation).  The lesion eventually became undetectable and it was advised that I still have yearly follow up because the abnormal cells will always be there and even though it is not detectable by scan the abnormiality is still there.  I had a baby 11 months ago and breastfed for 10 months.  Given the large hormone fluctuations that are unavoidable in pregnancy I am concerned that the lesion may have grown again.  My PCP will not order an MRI because he says it is not indicated.  I have been told otherwise by specialists that it still needs to be monitored.  Is this true?  Am I still at risk of having issues with this?  Should I be more persistant with my PCP and get a referral to a GI office?

[kerobin303]

i have been told i have a 2.5cm liver lesion. what could it be?
Where to from here? :(