PMID- 36973836 OWN - NLM STAT- MEDLINE DCOM- 20230329 LR - 20230329 IS - 1006-7248 (Print) IS - 1006-7248 (Linking) VI - 32 IP - 1 DP - 2023 Feb TI - [An improved paraffin embedding method for small core needle biopsy: technical introduction and evaluation]. PG - 6-11 AB - PURPOSE: Modified agar pre-embedded paraffin embedding method was proposed to evaluate the effects on tissue integrity, histological morphology, protein and DNA detection in small specimens of core needle biopsies. METHODS: The core needle biopsy specimens of 10 patients with oral mucosal squamous cell carcinoma were subjected to modified agar pre-embedded paraffin embedding using molded embedding molds and conventional paraffin embedding respectively, the dehydration time of the former was 3.5 h and that of the latter was 12 h. After tissue treatment, H-E staining, histological morphology, immunohistochemistry (IHC), and DNA fluorescence in situ hybridization (FISH) were performed, respectively. The results were compared and analyzed using GraphPad Prism 9 software package. RESULTS: The modified agar pre-embedding method was less difficult to perform than the agar pre-embedding method, and easier to be promoted. Compared with conventional paraffin embedding method, the tissue dehydration time was significantly reduced(P<0.001), and the results of microscopic histological morphology and subsequent IHC and FISH assays were reliable. CONCLUSIONS: The modified agar pre-embedded paraffin embedding method meets the requirements of clinical pathological diagnosis for tissue processing, and is worthy of clinical application for core needle biopsy specimens. FAU - Chen, Wan-Ling AU - Chen WL AD - Department of Oral Pathology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; College of Stomatology, Shanghai Jiao Tong University; National Center for Stomatology; National Clinical Research Center for Oral Diseases; Shanghai Key Laboratory of Stomatology; Shanghai Research Institute of Stomatology. Shanghai 200011, China. E-mail: cwl200940@live.cn. FAU - Shi, Chao-Ji AU - Shi CJ FAU - Wang, Min AU - Wang M FAU - Gu, Ting AU - Gu T FAU - Tian, Zhen AU - Tian Z LA - chi PT - English Abstract PT - Journal Article PL - China TA - Shanghai Kou Qiang Yi Xue JT - Shanghai kou qiang yi xue = Shanghai journal of stomatology JID - 101090220 RN - 9002-18-0 (Agar) RN - 9007-49-2 (DNA) SB - IM MH - Humans MH - Paraffin Embedding MH - Biopsy, Large-Core Needle MH - In Situ Hybridization, Fluorescence MH - Agar MH - *Dehydration MH - DNA MH - *Head and Neck Neoplasms MH - Biopsy EDAT- 2023/03/28 06:00 MHDA- 2023/03/29 06:05 CRDT- 2023/03/27 23:43 PHST- 2023/03/29 06:05 [medline] PHST- 2023/03/27 23:43 [entrez] PHST- 2023/03/28 06:00 [pubmed] PST - ppublish SO - Shanghai Kou Qiang Yi Xue. 2023 Feb;32(1):6-11.