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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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AgNOR staining and quantification.

Rinse in plenty of distilled water. They should appear yellow to light brown and nucleoli brown. Oil can be removed with xylene. This difference is significance. Int J Exp Pathol. Typing of AgNOR size and dispersion was also found to be an easy and reproducible alternative to traditional AgNOR counts for differentiating malignant from non-malignant effusions.

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Silver Staining for Nucleolar Organizer Regions

Rehydration was then performed in several changes of ultrapure distilled water. The grading of dots dispersion was performed according to Khan et al. An improved silver staining technique for nucleolus organizer regions by using nylon cloth. The AgNOR dots have become blurred due to dim background and less clearly visible when compared with photomicrograph a.


AgNORs can be identified as black dots in the nuclei. We conclude that modified AgNOR staining technique is simple, quick and reliable to evaluate cell proliferation by detecting AgNORs size and dispersion.

The results are in accordance with previous reports in multiple myeloma Pich et al. These counts were high in all 40 cases of astrocytoma proccedure grades I—IV and normal in normal brain tissue 0. Spontaneous in vitro neoplastic evolution of cultures Chinese hamster cells.

Put a few drops of xylene on the preparation and cover with a large No.

Modified method of AgNOR staining for tissue and interpretation in histopathology

Ptocedure organiser regions NORs are defined as nucleolar components containing a set of argyrophilic proteins, which are selectively stained by silver methods. Quantity of nucleolar silver-stained proteins is related to proliferative activity in cancer cells. The objective was to compare the different staining techniques used for AgNOR and to determine the best method.

For storage, leave stainjng slide on the bench until all the xylene has evaporated, remove the coverslip carefully and put slide in a box. Jpn J Human Genet 25, Argyrophilic nucleolar organizer region counts in multiple myeloma: After silver-staining, the NORs can be easily identified as black dots exclusively localised throughout the nucleolar area, and are called “AgNORs”.

Our results show that the mAgNOR was 2. Table 2 Comparison of mean AgNOR count, size, and distribution per cell between in different lesions. It is very costly and use the amount required for the number of cases. Cell kinetics analysis of surgically resected non-small cell carcinoma of the lung using the AgNOR silver stain. Should not be used because of the stainibg of AgNOR staining. One of these was originally introduced by Ploton et al.


A total of 60 brain specimens were stained with modified AgNOR technique. This will not destroy the silver staining.

The AgNOR stain Four-micron unstained sections were obtained from the sfaining areas of tissue to perform the silver staining. AgNOR size and dispersion may be more important than counting alone: Small-capped bottles were used in which different quantities of silver nitrate like 1, 2, 3 or 4 g were kept. Cancer Genet Cytogenet 35, AgNOR dots size and dispersion are clearly visible. The nuclei stain light yellow and out line of nuclei as well as cells were usually clearly visible.

The mean dispersion of AgNOR per cell in normal tissue and reactive gliosis was nil, while low in low-grade astrocytoma and high in high-grade astrocytoma mean 1. In our study, the results of size and dispersion of AgNORs were clearer without the use of counterstain.