Baş Y, Beyhan YE, Şahin HHK, Özçerezci T, Karasartova D, Güreser AS, Güney G, Taylan Özkan A. Evaluation of Formalin-fixed Paraffin-embedded Tissue Samples Diagnosed by Histopathology as
Echinococcus in Çorum.
Turkiye Parazitol Derg 2021;
45:262-267. [PMID:
34889193 DOI:
10.4274/tpd.galenos.2021.22931]
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Abstract
OBJECTIVE
This study aimed to detect the presence of Echinococcus spp. in formalin-fixed paraffin-embedded (FFPG) samples of hydatid cyst cases and to discuss the DNA isolation problems in FFPG samples.
METHODS
FFPG samples of 47 cases diagnosed with hydatid cyst were included in this study. Demographic characteristics of the cases were investigated. Microtome sections were taken from the samples and deparaffinization, DNA extraction, polymerase chain reaction (PCR), and gel agarose electrophoresis procedures were performed.
RESULTS
Of the cases, 55.3% were female, whereas 45.7% were male. Average age was 45.47 and 68.1% of the cases were located in the liver, 17.0% in the lung, 12.8% in the abdomen, and 2.1% in the brain. DNA was obtained in only 11 (23.4%) of the FFPG cyst samples and no proliferation was detected in the PCR products of any of the sample.
CONCLUSION
The scolex/germinal membrane' absence in the FFPG sections, intense inflammatory cell reaction, presence of fibrosis and stromal/parenchymal tissue, DNA damage due to formaldehyde action, long-term archiving, and insufficient amount of DNA obtained were considered as factors preventing DNA replication in PCR.
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