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4. Hrvatski kongres kliniËke citologije 4th Croatian Congress ... - Penta

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Cytotechnology - Oral Presentations<br />

PROBLEMS WITH STAINING PROCEDURES IN IMMUNOCYTOCHEMISTRY<br />

Meandžija R1 , Fumić G1 , Naglić G1 , Štanfel O2 , Seili-Bekafigo I1 1Department of Cytology, Department of Internal Medicine, Clinical Hospital Center<br />

Rijeka, Croatia<br />

2 Rijeka University School of Medicine, Department of Pathology, Rijeka, Croatia<br />

Aim: To identify weaknesses of immunocytochemistry (ICK) staining procedures, and to<br />

propose solutions for some of them, since data in the literature are very scarce on that<br />

subject. Material and methods: During 3 years period in The Department for Cytology,<br />

Department of Internal Medicine, Clinical Hospital Center Rijeka, we performed totally<br />

475 ICK analyses for 151 patients, mean 3,15 per patient. Most monoclonal antibodies<br />

used (Ber-ep4, CD3, CD20, Calretinin) react with membrane-bound antigenes, so any<br />

kind of pretreatment was not applied. We also tried to show TTF positivity in primary<br />

lung tumors, with and without pretreatment with TRIS- EDTA puffer on 96-97oC. Results:<br />

Staining for membrane-bound antigenes, gave good results using standard protocols<br />

recommended by manufacturer. The best results were obtained when using special<br />

Polysine slides. After pretreatment we got positive reaction with the nuclear antigen TTF<br />

as well. Conclusion: ICK is a powerfull diagnostic tool, but the staining procedure itself<br />

has to be precisely defined and standardized. The most important problems are: quality<br />

of particular slides (we do not know in advance if there are enough well preserved cells<br />

on each given slide), maintaining of the specimen on the slide during staining procedure<br />

if standard slides are used, correct determination of dillution and incubation period for<br />

each monoclonal antibody, revealing of the nuclear antigenes without interfering with<br />

specimen quality, and lack of control slides. There is a lot of work to be done in this field,<br />

regarding standardization and quality control.<br />

rmeandzija@net.hr<br />

177<br />

4 th <strong>Croatian</strong> <strong>Congress</strong> of Clinical Cytology / 1 st <strong>Croatian</strong> Symposium of Analytical Cytology / 2 nd <strong>Croatian</strong> Symposium of Cytotechnology

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