Mammo: focal asymmetry, sono: lipomas and adenopahies, surgeon recommend come back in 3 month, radiologist recommends mri:why?

Both are right: In their own way , radiologist wants to make sure not missing a lesion, surgeon wants follow up care in 3 months, clinical examination not suggestive of tumor , if you want get a MRI , which is not going to salve your problem, biopsy is the only way , core needle biopsy of the 'focal asymmetric area , you will have the answer.And peace of mind.

Depends...: Depends upon radiologists degree of suspicion. It seems as if the radiologist wants to better evaluate the area of focal asymmetry, especially if there are no prior mammograms for comparative evaluation. Does the surgeon have any information which the radiologist does not? For a definitive pathological evaluation, a stereotactic core biopsy would give the best answer, without a diagnosis delay.