HI,Welcome to HCM with your query.
Confirm the diagnosis before the Treatment Planning-
By the facts of your query,In my opinion,you seem to have infective lump?Boil/Sebaceous Cyst with reactivated infection in it,as its paining under the lump.In such a situation,its very difficult to confirm its relation to the Fibrous
Dysplasia removed 25 years back.
But the chances are there of link to the Fibrous Dysplasia,as this lump in the back on left side could be a
Secondary metastasis from a occult/hidden
breast cancer in the left breast.
Treatment-
Antibiotics/anti-inflammatory treatment from your doctor, if responded would confirm the infective cause of it.Non response would
need Second opinion from Surgeon who would direct further treatment after proper examination and investigations,accordingly.
But don't worry till this lump in the back is confirmed by
biopsy as Cancerous and Could be treated by -
Surgical Excision with Biospy,which would confirm further treatment line.
Hope this would help you to plan treatment with your doctor.
Will appreciate hitting thanks and writing review comments to benefit needy patient visitors at HCM like you.
Good day.
Dr.Savaskar M.N.
Senior Surgical Specialist.
M.S.Genl-CVTS.