PMID- 29019224 OWN - NLM STAT- MEDLINE DCOM- 20171211 LR - 20220311 IS - 1009-3591 (Print) IS - 1009-3591 (Linking) VI - 22 IP - 8 DP - 2016 Aug TI - [Diagnostic value of immunohistochemistry and FISH for chromosome 12p in type Ⅱ testicular germ cell tumors]. PG - 692-697 AB - OBJECTIVE: To study the pathological morphology, immunohistochemical characteristics, and molecular changes of type Ⅱ testicular germ cell tumors (TGCT) and investigate the possible value of immunohistochemistry and fluorescence in situ hybridization (FISH) in the diagnosis of TGCT. METHODS: We collected for this study 97 cases of TGCT, including 75 cases of seminoma, 17 cases of embryonal carcinoma, 11 cases of yolk sac tumor, 16 cases of mature teratoma, 3 cases of immature teratoma, and 1 case of epidermoid cyst, in which normal testicular tissue was found in 20 and non-TGCT in 6. We detected the expressions of different antibodies in various subtypes of TGCT by immunohistochemistry and determined the rate of chromosome 12p abnormality using FISH. RESULTS: The immunophenotypes varied with different subtypes of TGCT. SALL4 and PLAP exhibited high sensitivity in all histological subtypes. CD117 and OCT4 showed strongly positive expressions in invasive seminoma and germ cell neoplasia in situ (GCNIS) but not in normal seminiferous tubules. GPC3 was significantly expressed in the yolk sac tumor, superior to GATA3 and AFP in both range and intensity. CKpan, OCT4, and CD30 were extensively expressed in embryonal carcinoma, while HCG expressed in choriocarcinoma. The positivity rate of isochromosome 12p and 12p amplification in TGCT was 96.7% (29/30). CONCLUSIONS: The majority of TGCT can be diagnosed by histological observation, but immunohistochemical staining is crucial for more accurate subtypes and valuable for selection of individualized treatment options and evaluation of prognosis. Chromosome 12p abnormality is a specific molecular alteration in type Ⅱ TGCT, which is useful for ruling out other lesions. FAU - Shen, Qin AU - Shen Q AD - Department of Pathology, Jinling Hospital, Nanjing University School of Medicine / Nanjing General Hospital of Nanjing Military Region, Nanjing, Jiangsu 210002, China. FAU - Rao, Qiu AU - Rao Q AD - Department of Pathology, Jinling Hospital, Nanjing University School of Medicine / Nanjing General Hospital of Nanjing Military Region, Nanjing, Jiangsu 210002, China. FAU - Yu, Bo AU - Yu B AD - Department of Pathology, Jinling Hospital, Nanjing University School of Medicine / Nanjing General Hospital of Nanjing Military Region, Nanjing, Jiangsu 210002, China. FAU - Xia, Qiu-Yuan AU - Xia QY AD - Department of Pathology, Jinling Hospital, Nanjing University School of Medicine / Nanjing General Hospital of Nanjing Military Region, Nanjing, Jiangsu 210002, China. FAU - Bao, Wei AU - Bao W AD - Department of Pathology, Jinling Hospital, Nanjing University School of Medicine / Nanjing General Hospital of Nanjing Military Region, Nanjing, Jiangsu 210002, China. FAU - Lu, Zhen-Feng AU - Lu ZF AD - Department of Pathology, Jinling Hospital, Nanjing University School of Medicine / Nanjing General Hospital of Nanjing Military Region, Nanjing, Jiangsu 210002, China. FAU - Shi, Qun-Li AU - Shi QL AD - Department of Pathology, Jinling Hospital, Nanjing University School of Medicine / Nanjing General Hospital of Nanjing Military Region, Nanjing, Jiangsu 210002, China. FAU - Zhou, Xiao-Jun AU - Zhou XJ AD - Department of Pathology, Jinling Hospital, Nanjing University School of Medicine / Nanjing General Hospital of Nanjing Military Region, Nanjing, Jiangsu 210002, China. LA - chi PT - Journal Article PL - China TA - Zhonghua Nan Ke Xue JT - Zhonghua nan ke xue = National journal of andrology JID - 101093592 RN - 0 (Biomarkers, Tumor) RN - 0 (Genetic Markers) RN - Testicular Germ Cell Tumor SB - IM MH - Biomarkers, Tumor/metabolism MH - Carcinoma, Embryonal/diagnosis/genetics/metabolism/pathology MH - *Chromosome Aberrations MH - *Chromosomes, Human, Pair 12 MH - Endodermal Sinus Tumor/diagnosis/genetics/metabolism/pathology MH - Genetic Markers MH - Humans MH - *Immunohistochemistry MH - *In Situ Hybridization, Fluorescence MH - Male MH - Neoplasms, Germ Cell and Embryonal/*diagnosis/genetics/metabolism/pathology MH - Prognosis MH - Seminiferous Tubules/metabolism MH - Seminoma/diagnosis/genetics/metabolism/pathology MH - Teratoma/diagnosis/genetics/metabolism/pathology MH - Testicular Neoplasms/*diagnosis/genetics/metabolism/pathology OTO - NOTNLM OT - fluorescence in situ hybridization OT - immunohistochemistry OT - isochromosome of chromosome 12p OT - testicular germ cell tumor, type Ⅱ OT - testis EDAT- 2016/08/01 00:00 MHDA- 2017/12/12 06:00 CRDT- 2017/10/12 06:00 PHST- 2017/10/12 06:00 [entrez] PHST- 2016/08/01 00:00 [pubmed] PHST- 2017/12/12 06:00 [medline] PST - ppublish SO - Zhonghua Nan Ke Xue. 2016 Aug;22(8):692-697.