専　門

• 消化器病学
• 消化器内視鏡学(上部消化管癌の内視鏡診断・治療)
• 消化器癌の発生と進展

所属学会

• 日本内科学会　内科認定医
• 日本消化器病学会　専門医
• 日本消化器内視鏡学会　専門医・近畿支部評議員
• 日本癌治療医認定医機構　がん治療認定医
• 日本癌学会
• 日本食道学会
• 日本膵臓学会

業　績

英　文

1. Iwai N, Dohi O, Yamada S, Harusato A, Horie R, Yasuda T, Yamada N, Horii Y, Majima A, Zen K, Kimura H, Yagi N, Naito Y, Itoh Y. Prognostic risk factors associated with esophageal squamous cell carcinoma patients undergoing endoscopic submucosal dissection: a multi-center cohort study. Surg Endosc. 2022 Apr;36(4):2279-2289.
2. Iwai N, Sakagami J, Kagawa K. Acute pancreatitis related to a ghrelin receptor agonist. J Gastroenterol Hepatol. 2022 Aug;37(8):1473.
3. Iwai N, Okuda T, Sawada R, Ohara T, Hattori C, Taniguchi N, Sakai H, Oka K, Hara T, Tsuji T, Komaki T, Sakagami J, Kagawa K, Dohi O, Yasuda H, Itoh Y. Interstitial Lung Disease associated with Agaricus blazei Murill in a Patient with Pancreatic Ductal Adenocarcinoma Receiving Gemcitabine-based Therapy. Case Rep Gastroenterol. 2022 Mar 31;16(1):229-234.
4. Iwai N, Okuda T, Tsuji T, Sakai H, Oka K, Sakagami J, Kagawa K. Over-the-scope clip closure of gastric endoscopic submucosal dissection-induced ulcer in a patient with bleeding tendency. JGH Open. 2022 Sep 15. https://doi.org/10.1002/jgh3.12815.
5. Sakai H, Iwai N, Sakagami J, Okuda T, Ohara T, Hattori C, Taniguchi M, Oka K, Hara T, Tsuji T, Komaki T, Kagawa K, Dohi O, Yasuda H, Konishi H, Itoh Y. Rectal administration of low-dose diclofenac does not reduce post-endoscopic retrograde cholangiopancreatography pancreatitis: A propensity score matching analysis. Surg Endosc. In press.
6. Sakai H, Iwai N, Okuda T, Sakagami J, Kagawa K. Single-balloon-assisted ERCP in a patient with a giant hiatal hernia. Gastrointest Endosc. 2021 Dec;94(6):1147-1148.
7. Iwai N, Dohi O, Naito Y, Inada Y, Inoue K, Okayama T, Yoshida N, Katada K, Kamada K, Uchiyama K, Ishikawa T, Takagi T, Konishi H, Itoh Y. High-risk comorbidity influences prognosis in early gastric cancer after non-curative endoscopic submucosal dissection: a retrospective study. Dig Dis. 2021;39(2):96-105.
8. Oka K, Iwai N, Okuda T, Hara T, Inada Y, Tsuji T, Komaki T, Sakagami J, Naito Y, Kagawa K, Itoh Y. Clinical Features of False-Negative Early Gastric Cancers: A Retrospective Study of Endoscopic Submucosal Dissection Cases. Gastroenterol Res Pract. 2021;6635704.
9. Iwai N, Okuda T, Oka K, Sakagami J, Harada T, Ohara T, Hattori C, Taniguchi M, Sakai H, Hara T, Tsuji T, Komaki T, Kagawa K, Dohi O, Yasuda H, Itoh Y. Depletion of Psoas Muscle Mass after Systemic Chemotherapy Is Associated with Poor Prognosis in Patients with Unresectable Pancreatic Cancer. Cancers (Basel). 2021 Jul 31;13(15):3860.
10. Iwai N, Ohara T, Tsuji T, Taniguchi M, Sakai H, Oka K, Hara T, Okuda T, Komaki T, Sakagami J, Kagawa K, Itoh Y. Unusual abscess formation in colon cancer with mucinous components. JGH Open. 2021 Mar 3;5(4):520-521.
11. Iwai N, Okuda T, Sakagami J, Harada T, Ohara T, Taniguchi M, Sakai H, Oka K, Hara T, Tsuji T, Komaki T, Kagawa K, Yasuda H, Naito Y, Itoh Y. Neutrophil to lymphocyte ratio predicts prognosis in unresectable pancreatic cancer. Sci Rep. 2020 Oct 30;10(1):18758.
12. Iwai N, Okuda T, Kagawa K. Natural progression of early gastric cancer causing pyloric stenosis. J Gastroenterol Hepatol. 2020 Jan;35(1):9.
13. Iwai N, Okuda T, Tsuji T, Kagawa K. Endoscopic band ligation for a rectal Dieulafoy's lesion. Ann Gastroenterol. 2020 Mar-Apr;33(2):220.
14. Iwai N, Okuda T, Harada T, Oka K, Hara T, Inada Y, Tsuji T, Komaki T, Dohi O, Yoshida N, Konishi H, Naito Y, Itoh Y, Kagawa K. Gastric Metastasis from Colorectal Cancer Mimicking a Submucosal Tumor. Case Rep Gastroenterol. 2020 Jul 22;14(2):338-345.
15. Iwai N, Okuda T, Oka K, Hara T, Inada Y, Tsuji T, Komaki T, Itoh Y, Kagawa K. Tiny capillary hemangioma of the ileum as the cause of chronic anemia. JGH Open. 2020 Jun 22;4(5):1017-1018.
16. Iwai N, Okuda T, Oka K, Hara T, Inada Y, Tsuji T, Komaki T, Inoue K, Dohi O, Konishi H, Naito Y, Itoh Y, Kagawa K. Helicobacter pylori eradication increases the serum high density lipoprotein cholesterol level in the infected patients with chronic gastritis: A single-center observational study. PLoS One. 2019 Aug 16;14(8):e0221349.
17. Dohi O, Yagi N, Naito Y, Fukui A, Gen Y, Iwai N, Ueda T, Yoshida N, Kamada K, Uchiyama K, Takagi T, Konishi H, Yanagisawa A, Itoh Y. Blue laser imaging-bright improves real-time detection rate of early gastric cancer: a randomized controlled study. Gastrointest Endosc. 2019 Jan;89(1):47-57.
18. Iwai N, Handa O, Naito Y, Dohi O, Okayama T, Yoshida N, Kamada K, Uchiyama K, Ishikawa T, Takagi T, Konishi H, Itoh Y. Stenotic Ischemic Enteritis with Concomitant Hepatic Portal Venous Gas and Pneumatosis Cystoides Intestinalis. Intern Med. 2018 Jul 15;57(14):1995-1999.
19. Iwai N, Dohi O, Naito Y, Inada Y, Fukui A, Takayama S, Ogita K, Terasaki K, Nakano T, Ueda T, Okayama T, Yoshida N, Katada K, Kamada K, Uchiyama K, Ishikawa T, Handa O, Takagi T, Konishi H, Yagi N, Itoh Y. Impact of the Charlson comorbidity index and prognostic nutritional index on prognosis in patients with early gastric cancer after endoscopic submucosal dissection. Dig Endosc. 2018 Sep;30(5):616-623.
20. Iwai N, Yasui K, Tomie A, Gen Y, Terasaki K, Kitaichi T, Soda T, Yamada N, Dohi O, Seko Y, Umemura A, Nishikawa T, Yamaguchi K, Moriguchi M, Konishi H, Naito Y, Itoh Y. Oncogenic miR-96-5p inhibits apoptosis by targeting the caspase-9 gene in hepatocellular carcinoma. Int J Oncol. 2018 Jul;53(1):237-245.

和　文

1. 岩井 直人, 奥田 隆史, 阪上 順一, 香川 惠造, 原田 大司. 当院の切除不能膵がんにおけるmodified FOLFIRINOX療法の有効性について 市立福知山市民病院医学雑誌 2021; 6: 25-31.
2. 岩井 直人, 若林 直樹, 松本 尚之, 森田 幸弘, 田中 順子, 寄木 浩行, 藤井 恒太, 高田 龍介, 高谷 宏樹, 益澤 明, 高見 史朗, 片岡 慶正. 胃癌術後15年目の腹膜播種再発に対してS-1+Paclitaxel経静脈・腹腔内併用療法が著効した1例 癌と化学療法 2015; 42(3): 351-354.
3. 岩井 直人, 藤井 恒太, 高見 史朗, 若林 直樹. 右腎癌術後に発症した十二指腸狭窄を伴う前下膵十二指腸動脈瘤破裂の1例 日本腹部救急医学会雑誌 2014; 34(7): 1363-1367.
4. 岩井 直人, 藤井 恒太, 高見 史朗, 若林 直樹, 柳橋 健. 刺激性下剤内服を契機に発症した高CEA血症を伴う壊死型虚血性大腸炎の1例 日本腹部救急医学会雑誌 2014; 34(5): 1043-1047.
5. 岩井 直人, 高見 史朗, 森田 幸弘, 藤井 恒太, 高田 龍介, 高谷 宏樹, 益澤 明, 松本 尚之, 若林 直樹, 片岡 慶正. 経カテーテル的血栓溶解療法後に虚血性小腸炎をきたした上腸間膜動脈閉塞症の1例 日本消化器病学会雑誌 2014; 111(8): 1587-1593.
6. 岩井 直人, 高見 史朗, 藤井 恒太, 若林 直樹, 片岡 慶正. 高齢男性に急性肝炎様発症した自己免疫性肝炎の1例 内科 2014; 114(5):896-899.