Nucleolar organizer regions [NORS] are loops of DNA that transcribe to ribosomal RNA. They can be visualized as intranuclear black dots by histochemical staining with a colloid @entity575 solution. @entity575 stained nucleolar proteins (AgNORs) were counted in a variety of @entity5 . In @entity421 , the number of AgNORs was also quantified before and after chemotherapy. @entity5 cells possessed more than five small AgNORs (5.54 +/- 0.44). Nuclei of benign jaw @entity5 cells had less than three (2. 97 +/-0.61). A significant difference in the number of AgNORs between @entity421 before chemotherapy (5.76 +/- 0.50) and after chemotherapy (3.89 +/- 1.65) was observed. (P < 0.05). The number ofAgNORs in @entity421 , recurrent @entity189 and recurrent @entity511 was much higher than in their respective @entity75 but without statistical significant difference. The results of the present study indicate that the AGNOR count might help in determining malignancy, evaluating the effect of chemotherapy, and deciding the prognosis.

Evaluation of nucleolar organizer regions in XXXX of the jaw bones.

@entity511 :: ('MESH:D002813', 'Disease') :: ['chondrosarcoma'] @entity575 :: ('MESH:D012834', 'Chemical') :: ['Silver', 'silver'] @entity5 :: ('MESH:D009369', 'Disease') :: ['jaw bone tumours', 'bone tumour', 'Malignant bone tumour'] @entity75 :: ('MESH:D001927', 'Disease') :: ['primary lesion'] @entity189 :: ('MESH:D002277', 'Disease') :: ['ameloblastic carcinoma'] @entity421 :: ('MESH:D012516', 'Disease') :: ['recurrent osteosarcoma', 'osteosarcomas', 'osteosarcoma']
@entity5 :: (MESH:D009369,Disease) :: ['tumours']
