{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,23]],"date-time":"2026-09-23T14:10:42Z","timestamp":1790172642813,"version":"4.1.0"},"reference-count":10,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2025,8,14]],"date-time":"2025-08-14T00:00:00Z","timestamp":1755129600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2025,8,14]],"date-time":"2025-08-14T00:00:00Z","timestamp":1755129600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["DEN Open"],"published-print":{"date-parts":[[2026,4]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>A female patient in her 60s tested positive for the fecal occult blood test while undergoing health screening. Colonoscopy revealed a 15\u2010mm\u2010sized flat elevated lesion with a central depression in the sigmoid colon. Narrow\u2010band imaging magnification revealed a Japan Narrow\u2010Band Imaging Expert Team classification of type 2B, whereas crystal violet staining showed a mild to severely irregular type VI pit pattern. Ultra\u2010magnification imaging revealed an EC3a morphology in the depressed area. Endoscopic ultrasonography revealed partial disruption of the third layer, leading to the diagnosis of T1b (SM) colon cancer. Owing to the intermediate lesion size and since the patient had requested it, an endoscopic submucosal dissection was performed as an initial treatment. Pathological analysis revealed a moderately differentiated tubular adenocarcinoma with an invasive micropapillary carcinoma (IMPC) component, with deep submucosal invasion. Additional surgery was performed, and no recurrence was observed in the following three years. IMPC is known for its high rate of lymph\u2010node metastasis and poor prognosis, as reported for breast, bladder, and lung cancers. IMPC is rare; this report presents a literature review and case details. This case represents the first reported instance of identification of a cancerous IMPC component by magnifying endoscopy at the T1b (SM) depth. Thus, even for intermediate lesions, IMPC should be considered as a differential diagnosis when endoscopic imaging suggests malignancy.<\/jats:p>","DOI":"10.1002\/deo2.70184","type":"journal-article","created":{"date-parts":[[2025,8,14]],"date-time":"2025-08-14T14:14:57Z","timestamp":1755180897000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["A Case of Human Epidermal Growth Factor Receptor 2\u2010Positive Colon Cancer With Invasive Micropapillary Carcinoma Component"],"prefix":"10.1002","volume":"6","author":[{"given":"Masashi","family":"Kono","sequence":"first","affiliation":[{"name":"Department of Gastroenterology and Hepatology Faculty of Medicine Kindai University  Osaka Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0068-8461","authenticated-orcid":false,"given":"Yoriaki","family":"Komeda","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology and Hepatology Faculty of Medicine Kindai University  Osaka Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiroshi","family":"Kashida","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology and Hepatology Faculty of Medicine Kindai University  Osaka Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Satoru","family":"Hagiwara","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology and Hepatology Faculty of Medicine Kindai University  Osaka Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Akihiro","family":"Yoshida","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology and Hepatology Faculty of Medicine Kindai University  Osaka Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7291-3608","authenticated-orcid":false,"given":"Shunsuke","family":"Omoto","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology and Hepatology Faculty of Medicine Kindai University  Osaka Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7308-4311","authenticated-orcid":false,"given":"Mamoru","family":"Takenaka","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology and Hepatology Faculty of Medicine Kindai University  Osaka Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Naoko","family":"Tsuji","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology and Hepatology Faculty of Medicine Kindai University  Osaka Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"George","family":"Tribonias","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology Red Cross Hospital  Athens Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masatoshi","family":"Kudo","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology and Hepatology Faculty of Medicine Kindai University  Osaka Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,8,14]]},"reference":[{"key":"e_1_2_9_2_1","first-page":"660","article-title":"Invasive Micropapillary Carcinoma of the Breast","volume":"6","author":"Siriaunkgul S.","year":"1993","journal-title":"Modern Pathology"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1097\/01.pap.0000138142.26882.fe"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1038\/modpathol.3800790"},{"key":"e_1_2_9_5_1","first-page":"183","article-title":"Colon Invasive Micropapillary Carcinoma Arising in Tubulovillous Adenoma","volume":"59","author":"Kondo T.","year":"2008","journal-title":"Polish Journal of Pathology"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1093\/jjco\/hyp015"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1093\/jjco\/hyp051"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1159\/000345566"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.1055\/s\u20100042\u2010106721"},{"key":"e_1_2_9_10_1","doi-asserted-by":"publisher","DOI":"10.1097\/PAS.0b013e3181a5387b"},{"key":"e_1_2_9_11_1","doi-asserted-by":"publisher","DOI":"10.1002\/path.4679"}],"container-title":["DEN Open"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/deo2.70184","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1002\/deo2.70184","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/deo2.70184","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,9,23]],"date-time":"2026-09-23T13:58:14Z","timestamp":1790171894000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/deo2.70184"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,8,14]]},"references-count":10,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2026,4]]}},"alternative-id":["10.1002\/deo2.70184"],"URL":"https:\/\/doi.org\/10.1002\/deo2.70184","archive":["Portico"],"relation":{},"ISSN":["2692-4609","2692-4609"],"issn-type":[{"value":"2692-4609","type":"print"},{"value":"2692-4609","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,8,14]]},"assertion":[{"value":"2025-02-26","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2025-07-30","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2025-08-14","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"e70184"}}