The axillary tail of breast hypertrophy , Accessory breasts in axilla and bilateral axillary lipomas
are different identities all together.
The report suggesting axillary tail of breast as the pathology is quite common and infiltration with fat may be true or an error with the biopsy
Whatever it is , it cannot be termed as an ILLNESS.It is definitely a surgical procedure done by plastic surgeons most commonly for aesthetic purpose only unless it had some complications such as pain , infection etc .
I hope i have answered your query.if you have any further questions you may post again