PMID- 28781783 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20201001 IS - 2049-9450 (Print) IS - 2049-9469 (Electronic) IS - 2049-9450 (Linking) VI - 7 IP - 2 DP - 2017 Aug TI - Neuroendocrine carcinoma of the lung expressing anaplastic lymphoma kinase on high-sensitivity immunohistochemistry: A case report. PG - 188-192 LID - 10.3892/mco.2017.1308 [doi] AB - It has been reported that anaplastic lymphoma kinase (ALK) protein is expressed in a proportion of non-small-cell carcinomas (mainly adenocarcinomas). By contrast, high-sensitivity immunohistochemistry (IHC) rarely detects ALK protein expression in neuroendocrine carcinomas (NECs) of the lung, which include small-cell carcinomas and large-cell neuroendocrine carcinomas (LCNECs). We herein present a case of NEC that was identified as ALK-positive via high-sensitivity IHC. A 51-year-old man was diagnosed with small-cell carcinoma in the upper lobe of the right lung. Although high-sensitivity IHC revealed that the tumor weakly expressed the ALK protein, no fusion gene with ALK was found using fluorescence in situ hybridization (FISH). Standard chemotherapy was administered to the patient. Six months after the first visit to the hospital for the tumor, another tumor was identified in the upper lobe of the left lung. The tumor was resected and diagnosed as NEC displaying LCNEC-like characteristics. This NEC also moderately expressed ALK protein by high-sensitivity IHC, without exhibiting fusion genes with ALK on FISH. These data suggest that the presence of ALK fusion genes should be confirmed by FISH or reverse transcription polymerase chain reaction, even if high-sensitivity IHC for ALK protein is positive in lung cancer. FAU - Miyoshi, Kotoko AU - Miyoshi K AD - Department of Respiratory Medicine, Toyooka Hospital, Toyooka, Hyogo, Japan. FAU - Adachi, Yasushi AU - Adachi Y AD - Department of Diagnostic Pathology, Toyooka Hospital, Toyooka, Hyogo, Japan. AD - Department of Stem Cell Disorders, Kansai Medical University, Hirakata, Osaka, Japan. AD - Department of Pediatrics, Kansai Medical University, Hirakata, Osaka, Japan. FAU - Nakaji, Hitoshi AU - Nakaji H AD - Department of Respiratory Medicine, Toyooka Hospital, Toyooka, Hyogo, Japan. FAU - Okamura, Akiharu AU - Okamura A AD - Department of Diagnostic Pathology, Kakogawa Central Hospital, Kakogawa, Hyogo, Japan. FAU - Sakai, Yasuhiro AU - Sakai Y AD - Department of Diagnostic Pathology, Kobe University Graduate School of Medicine/School of Medicine, Kobe, Hyogo, Japan. FAU - Hirano, Ryuji AU - Hirano R AD - Division of Thoracic and Cardiovascular Surgery, Toyooka Hospital, Toyooka, Hyogo, Japan. FAU - Yahata, Shinsuke AU - Yahata S AD - Department of Internal General Medicine, Hamasaka Public Hospital, Hamasaka, Hyogo, Japan. FAU - Li, Ming AU - Li M AD - Department of Stem Cell Disorders, Kansai Medical University, Hirakata, Osaka, Japan. AD - Department of Laboratory for Cardiovascular Disease, Novel, Non-invasive and Nutritional Therapeutics (CNT), Osaka University, Suita, Osaka, Japan. FAU - Ikehara, Susumu AU - Ikehara S AD - Department of Stem Cell Disorders, Kansai Medical University, Hirakata, Osaka, Japan. AD - Kansai Medical University, Hirakata, Osaka, Japan. LA - eng PT - Journal Article DEP - 20170629 PL - England TA - Mol Clin Oncol JT - Molecular and clinical oncology JID - 101613422 PMC - PMC5532692 OTO - NOTNLM OT - anaplastic lymphoma kinase OT - high-sensitivity immunohistochemistry OT - lung OT - neuroendocrine carcinoma EDAT- 2017/08/07 06:00 MHDA- 2017/08/07 06:01 PMCR- 2017/06/29 CRDT- 2017/08/08 06:00 PHST- 2016/11/09 00:00 [received] PHST- 2017/03/29 00:00 [accepted] PHST- 2017/08/08 06:00 [entrez] PHST- 2017/08/07 06:00 [pubmed] PHST- 2017/08/07 06:01 [medline] PHST- 2017/06/29 00:00 [pmc-release] AID - MCO-0-0-1308 [pii] AID - 10.3892/mco.2017.1308 [doi] PST - ppublish SO - Mol Clin Oncol. 2017 Aug;7(2):188-192. doi: 10.3892/mco.2017.1308. Epub 2017 Jun 29.