Fig.3 AgNOR staining with peripheral blood lymphocytes. . The technical aspect of AgNOR staining procedure should be carefully dealt with. Attention should. Conclusions: AgNOR staining can be considered as a useful adjunct to adjunct procedures which can diagnose malignancy at the earliest. Silver staining results are comparable to those obtained. [A standardized AgNOR stain method for formalin fixed and paraffin embedded .. to be a good adjunct to presently available frozen section techniques and cytology.

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Nucleolar and argyrophilic nucleolar organizer region counts in urothelial carcinomas with special emphasis on grade II tumors.

Open in a separate window. Relationship between AgNOR proteins, Ki antigen, p53 immunophenotype and differentiation markers in archival breast carcinomas. Ultra pure distilled water was used for stainijg of all solutions. For quick results incubate at C for min. These findings are consistent with our results and suggestions that size and configuration of the dots are more important for interpretation of the results in malignant neoplasms.


The tissue was then ready for counts. It comprised silver nitrate and deionized water.

We are aware that morphometric quantitative analysis for AgNOR dots should be performed; however, the technique is rather expensive and, unfortunately, is not available in our laboratory. They should appear yellow to light brown and nucleoli brown. Naveed, who provided the opportunities and facilities for this research work and encouraged to write it for international readers.

Silver Staining for Nucleolar Organizer Regions

Silver nitrate stains clothes lab benches and fingers black, normally after about 6h. Quantity of nucleolar silver-stained proteins is related to proliferative activity in cancer cells.

National Center for Biotechnology InformationU. Alternatively, you can examine the slides directly with immersion oil. It is corrosive, but not really dangerous to human beings, and is used occasionally as a disinfectant.

Modified method of AgNOR staining for tissue and interpretation in histopathology

Jpn J Human Genet 25, Acknowledgments We are thankful to our Prof. Aneuploidy was indicated when tumours had mAgNOR counts of 2. Bovid cow diversity and evolution. It is advisable to wear gloves as the black spots are not very attractive. In our study, the mAgNOR and pAgNOR proliferative index were high in more proliferative and mitotically active tumours cells as we moved up in different grades of astrocytoma i.


In future, AgNOR size and dispersion should be considered rather than the count only. Their size and number reflect nucleolar and cell proliferative activity of tumours Derenzini et al. Patterns of argyrophilic nucleolar organiser regions in pleural and peritoneal effusions. In previous methods counter stain Neutral red was used. Journal compilation Blackwell Publishing Ltd.

We performed the AgNOR staining with previously adapted procedure and modified procedures. A total of 60 brain specimens were stained with modified AgNOR technique.

It was concluded, that standardized AgNOR agnof correlate with markers of increased malignant potential in breast carcinomas. This will not destroy the silver staining. Role of the argyrophilic nucleolar organizer regions in tumor detection and prognosis.

Modified method of AgNOR staining for tissue and interpretation in histopathology

The correlation of two argyophilic nucleolar organizer region counting method with bromodeoxyuridine-labeling index: The AgNOR dots have become blurred due peocedure dim background and less clearly visible as compared to photomicrograph a.


Two investigators without knowledge of the method of AgNOR stain, tumour type, grade, stage, or disease outcome, performed the AgNOR counts, size and distribution. An improved silver staining technique for nucleolus organizer regions by using nylon cloth.

Should not be used because of the blurring of AgNOR staining.