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Vasculogenic mimicry (VM) is a process by which the malignant cells can generate vascular-like structures formed of periodic acid\u2013Schiff (PAS) positive\/CD31 negative extracellular matrix independent of angiogenesis and thus promotes tumor progression. N-myc downstream\u2013regulated gene 1 (NDRG1) is a protein that can modulate tumor angiogenesis; however, its role in regulating tumor angiogenesis and VM formation has not been previously investigated in UC. This study aims to evaluate the role of intra-tumor microvessel density (MVD) (as a surrogate measure of angiogenesis), VM, and NDRG1 in UC and their correlation with different clinicopathologic features, then assess the correlation between them in UC. Sixty specimens of UC of the bladder were included. PAS-CD31 immunohistochemical double staining method was used to evaluate the intra-tumor MVD and VM. Immunohistochemical expression of NDRG1 was also examined. VM and NDRG1 expression were detected in 41.7% and 83.3% of UC specimens respectively. The mean of intra-tumor MVD, VM area, and NDRG1 was significantly higher in tumors with higher grade, lymphovascular invasion, and higher T stage. NDRG1 expression was positively correlated with MVD and VM. We can suggest that MVD, VM, and NDRG1 may serve as poor prognostic markers for UC. The positive correlation between NDRG1 and both MVD and VM may provide the first evidence that NDRG1 can induce tumor angiogenesis and VM in UC which may offer a novel pathway for further therapeutic strategies.<\/jats:p>","DOI":"10.1007\/s00428-024-03793-w","type":"journal-article","created":{"date-parts":[[2024,4,2]],"date-time":"2024-04-02T04:44:50Z","timestamp":1712033090000},"page":"827-836","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["N-myc downstream\u2013regulated gene 1 can promote vasculogenic mimicry and angiogenesis in urothelial carcinoma"],"prefix":"10.1007","volume":"484","author":[{"given":"Ereny Kamal","family":"Louis","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Islam F.","family":"Abdelkawi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Abeer","family":"Refaiy","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6546-3848","authenticated-orcid":false,"given":"Asmaa M.","family":"Ahmed","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2024,4,2]]},"reference":[{"key":"3793_CR1","doi-asserted-by":"publisher","unstructured":"Sanguedolce F, Zanelli M, Palicelli A, Bisagni A, Zizzo M, Ascani S, Pedicillo MC, Cormio A, Falagario UG, Carrieri G, Cormio L (2023) HER2 expression in bladder cancer: a focused view on its diagnostic, prognostic, and predictive role. 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