hello, first of all i would like to know how come u have diagnosed the lesion- as glandular odontogenic cyst
.. was biopsy
taken.. without biopsy nothing can be confirmed about any of painless swelling in the jaw.. if it is being diagnosed earlier then.. the treatment plan will be surgical enucleation of the cyst along with RCT in involved teeth if required..as cyst sometimes in long course damages periapical area of teeth also.. do not postpone treatment now as already 10 yrs have been delayed and the size of lesion has been increased.. more swelling indicates increased loss of bone or tissues in the region.. any cystic lesion should be surgically removed as soon as possible on diagnosis as they after long term may have potential to turn to any malignant lesion too..
and regarding any kind of painless long standing swelling of jaws diagnostic protocols are-clinical examination, FNAC, radiograph of region OPG,PA,Lat Oblique, occlusal, if closed to vital regions then CT Scan
for knowing exact involvement of hard tissues, if soft tissue
cyst is there then sonography
of region along with incisional biopsy in both cases... later as per diagnosis after pathological assessment and clinical evaluation the treatment plan will be decided...