PMID- 30576255 OWN - NLM STAT- MEDLINE DCOM- 20200318 LR - 20200318 IS - 1744-8328 (Electronic) IS - 1473-7140 (Linking) VI - 19 IP - 3 DP - 2019 Mar TI - ALK testing methods: is there a winner or loser? PG - 237-244 LID - 10.1080/14737140.2019.1562343 [doi] AB - Anaplastic lymphoma kinase (ALK) is one of the most attractive molecular targets for the treatment of patients with non-small-cell lung cancer. Treatment with ALK inhibitors is recognized as the standard-of-care for patients with ALK gene rearrangements, but it is important to appropriately select patients who will benefit from such treatment. Areas covered: In this article, we review the evidence regarding ALK testing. Immunohistochemistry (IHC), fluorescence in situ hybridization (FISH), and reverse transcription polymerase chain reaction (RT-PCR) are the representative methods for detecting ALK gene fusions. Among these diagnostic modalities, IHC in particular exhibits high sensitivity and specificity for the detection of ALK fusions when appropriately applied and interpreted. Expert commentary: Discrepancies have been reported between the results of IHC and FISH. However, it was revealed that patients with IHC-positivity and FISH-negativity may respond to alectinib, indicating that IHC can be used as a stand-alone method from a clinical standpoint for the identification of patients eligible for treatment with ALK inhibitors. In addition, differences between ALK variants have been reported to affect the prognosis and efficacy of ALK inhibitor-based treatments, and RT-PCR will likely increase in importance as a complementary tool. FAU - Kozuma, Yuka AU - Kozuma Y AD - a Department of Thoracic Oncology , National Kyushu Cancer Center , Fukuoka , Japan. AD - b Department of Surgery and Sciences, Graduate School of Medical Sciences , Kyushu University , Fukuoka , Japan. FAU - Toyokawa, Gouji AU - Toyokawa G AD - b Department of Surgery and Sciences, Graduate School of Medical Sciences , Kyushu University , Fukuoka , Japan. FAU - Seto, Takashi AU - Seto T AD - a Department of Thoracic Oncology , National Kyushu Cancer Center , Fukuoka , Japan. LA - eng PT - Journal Article PT - Review DEP - 20181228 PL - England TA - Expert Rev Anticancer Ther JT - Expert review of anticancer therapy JID - 101123358 RN - 0 (Antineoplastic Agents) RN - 0 (Protein Kinase Inhibitors) RN - EC 2.7.10.1 (ALK protein, human) RN - EC 2.7.10.1 (Anaplastic Lymphoma Kinase) SB - IM MH - Anaplastic Lymphoma Kinase/*antagonists & inhibitors/genetics MH - Antineoplastic Agents/pharmacology MH - Carcinoma, Non-Small-Cell Lung/*drug therapy/genetics/pathology MH - Gene Rearrangement MH - Humans MH - Immunohistochemistry MH - In Situ Hybridization, Fluorescence MH - Lung Neoplasms/*drug therapy/genetics/pathology MH - Protein Kinase Inhibitors/pharmacology MH - Reverse Transcriptase Polymerase Chain Reaction OTO - NOTNLM OT - ALK OT - FISH OT - IHC OT - RT-PCR OT - non-small-cell lung cancer EDAT- 2018/12/24 06:00 MHDA- 2020/03/19 06:00 CRDT- 2018/12/22 06:00 PHST- 2018/12/24 06:00 [pubmed] PHST- 2020/03/19 06:00 [medline] PHST- 2018/12/22 06:00 [entrez] AID - 10.1080/14737140.2019.1562343 [doi] PST - ppublish SO - Expert Rev Anticancer Ther. 2019 Mar;19(3):237-244. doi: 10.1080/14737140.2019.1562343. Epub 2018 Dec 28.