bone tumor of skull with headache, please respond

I have a 3.5 centimeter bone tumor of the skull in the immediate left supraorbital location abutting the left frontal sinus.  The tumor was discovered 4 years ago and has not changed at all.    Symptoms are a constant pressure headache that NEVER goes away and I've had it for 4 years now.     The diagnosis based on CT, MRI and nuclear bone scan is monostotic fibrous dysplasia.      Recently I saw a new ENT who recommended bisphosphonates therapy and referred me to an endocrinologist  for this and he told me if this doesn't work talk to him about an endoscopic operation.   He said that a Reclast infusion may help me, or Fosamax.

Please tell me what you know about this.    I worry about 2 things right now-- what if the bone tumor is something else and not fibrous dysplasia, and the bisphosphonates make it worse by causing a more heavy calcification?    What about the side effects of such a drug on someone who is only 31 yrs old?  Please tell me all you can

[Rob2008]

skipped again...dang :(

[Rob2008]

is there a doctor in the house?