PMID- 28506304 OWN - NLM STAT- MEDLINE DCOM- 20180226 LR - 20221207 IS - 1471-2407 (Electronic) IS - 1471-2407 (Linking) VI - 17 IP - 1 DP - 2017 May 15 TI - Characterization of genetic aberrations in a single case of metastatic thymic adenocarcinoma. PG - 330 LID - 10.1186/s12885-017-3282-9 [doi] LID - 330 AB - BACKGROUND: Thymic adenocarcinoma is an extremely rare subtype of thymic epithelial tumors. Due to its rarity, there is currently no sequencing approach for thymic adenocarcinoma. METHODS: We performed whole exome and transcriptome sequencing on a case of thymic adenocarcinoma and performed subsequent validation using Sanger sequencing. RESULTS: The case of thymic adenocarcinoma showed aggressive behaviors with systemic bone metastases. We identified a high incidence of genetic aberrations, which included somatic mutations in RNASEL, PEG10, TNFSF15, TP53, TGFB2, and FAT1. Copy number analysis revealed a complex chromosomal rearrangement of chromosome 8, which resulted in gene fusion between MCM4 and SNTB1 and dramatic amplification of MYC and NDRG1. Focal deletion was detected at human leukocyte antigen (HLA) class II alleles, which was previously observed in thymic epithelial tumors. We further investigated fusion transcripts using RNA-seq data and found an intergenic splicing event between the CTBS and GNG5 transcript. Finally, enrichment analysis using all the variants represented the immune system dysfunction in thymic adenocarcinoma. CONCLUSION: Thymic adenocarcinoma shows highly malignant characteristics with alterations in several cancer-related genes. FAU - Lee, Yeonghun AU - Lee Y AD - School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, South Korea. FAU - Park, Sehhoon AU - Park S AD - Division of Hematology and Medical Oncology, Department of Internal Medicine, Seoul National University Hospital, 101 Daehakro, Jongnogu, Seoul, 110-744, South Korea. FAU - Lee, Se-Hoon AU - Lee SH AD - Division of Hematology and Medical Oncology, Department of Internal Medicine, Seoul National University Hospital, 101 Daehakro, Jongnogu, Seoul, 110-744, South Korea. sehoon.lee119@gmail.com. AD - Division of Hematology/Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-Ro Gangnam-gu, Seoul, 06351, South Korea. sehoon.lee119@gmail.com. FAU - Lee, Hyunju AU - Lee H AD - School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, South Korea. hyunjulee@gist.ac.kr. LA - eng PT - Case Reports PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20170515 PL - England TA - BMC Cancer JT - BMC cancer JID - 100967800 RN - Thymic epithelial tumor SB - IM MH - Adenocarcinoma/diagnostic imaging/*genetics/pathology MH - Adult MH - Bone Neoplasms/secondary MH - DNA Copy Number Variations/*genetics MH - Humans MH - Male MH - Mutation/*genetics MH - Neoplasms, Glandular and Epithelial/diagnostic imaging/*genetics/pathology MH - Thymoma/diagnostic imaging/*genetics/pathology MH - Thymus Neoplasms/diagnostic imaging/*genetics/pathology MH - Exome Sequencing PMC - PMC5432996 OTO - NOTNLM OT - Somatic copy number alterations OT - Somatic mutations OT - Thymic adenocarcinoma OT - Thymic epithelial tumors OT - Whole exome sequencing EDAT- 2017/05/17 06:00 MHDA- 2018/02/27 06:00 PMCR- 2017/05/15 CRDT- 2017/05/17 06:00 PHST- 2016/09/07 00:00 [received] PHST- 2017/04/13 00:00 [accepted] PHST- 2017/05/17 06:00 [entrez] PHST- 2017/05/17 06:00 [pubmed] PHST- 2018/02/27 06:00 [medline] PHST- 2017/05/15 00:00 [pmc-release] AID - 10.1186/s12885-017-3282-9 [pii] AID - 3282 [pii] AID - 10.1186/s12885-017-3282-9 [doi] PST - epublish SO - BMC Cancer. 2017 May 15;17(1):330. doi: 10.1186/s12885-017-3282-9.