@article{LockReimerPietrygaetal.2021,
  author    = {Lock, Johan F and Reimer, Stanislaus and Pietryga, Sebastian and Jakubietz, Rafael and Flemming, Sven and Meining, Alexander and Germer, Christoph-Thomas and Seyfried, Florian},
  title     = {Managing esophagocutaneous fistula after secondary gastric pull-up: A case report},
  series = {World Journal of Gastroenterology},
  volume    = {27},
  journal   = {World Journal of Gastroenterology},
  doi       = {10.3748/wjg.v27.i16.1841},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-369417},
  pages     = {1841-1846},
  year      = {2021},
  abstract  = {Background Gastric pull-up (GPU) procedures may be complicated by leaks, fistulas, or stenoses. These complications are usually managed by endoscopy, but in extreme cases multidisciplinary management including reoperation may be necessary. Here, we report a combined endoscopic and surgical approach to manage a failed secondary GPU procedure. Case summary A 70-year-old male with treatment-refractory cervical esophagocutaneous fistula with stenotic remnant esophagus after secondary GPU was transferred to our tertiary hospital. Local and systemic infection originating from the infected fistula was resolved by endoscopy. Hence, elective esophageal reconstruction with free-jejunal interposition was performed with no subsequent adverse events. Conclusion A multidisciplinary approach involving interventional endoscopists and surgeons successfully managed severe complications arising from a cervical esophago-cutaneous fistula after GPU. Endoscopic treatment may have lowered the perioperative risk to promote primary wound healing after free-jejunal graft interposition.},
  language  = {en}
}
@article{WeichRogollGawlasetal.2021,
  author    = {Weich, Alexander and Rogoll, Dorothee and Gawlas, Sophia and Mayer, Lars and Weich, Wolfgang and Pongracz, Judit and Kudlich, Theodor and Meining, Alexander and Scheurlen, Michael},
  title     = {Wnt/β-catenin signaling regulates CXCR4 expression and [\(^{68}\)Ga] Pentixafor internalization in neuroendocrine tumor cells},
  series = {Diagnostics},
  volume    = {11},
  journal   = {Diagnostics},
  number    = {2},
  issn      = {2075-4418},
  doi       = {10.3390/diagnostics11020367},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-228914},
  year      = {2021},
  abstract  = {Loss of Somatostatin Receptor 2 (SSTR2) expression and rising CXC Chemokine Receptor Type 4 (CXCR4) expression are associated with dedifferentiation in neuroendocrine tumors (NET). In NET, CXCR4 expression is associated with enhanced metastatic and invasive potential and worse prognosis but might be a theragnostic target. Likewise, activation of Wnt/β-catenin signaling may promote a more aggressive phenotype in NET. We hypothesized an interaction of the Wnt/β-catenin pathway with CXCR4 expression and function in NET. The NET cell lines BON-1, QGP-1, and MS-18 were exposed to Wnt inhibitors (5-aza-CdR, quercetin, and niclosamide) or the Wnt activator LiCl. The expressions of Wnt pathway genes and of CXCR4 were studied by qRT-PCR, Western blot, and immunohistochemistry. The effects of Wnt modulators on uptake of the CXCR4 ligand [\(^{68}\)Ga] Pentixafor were measured. The Wnt activator LiCl induced upregulation of CXCR4 and Wnt target gene expression. Treatment with the Wnt inhibitors had opposite effects. LiCl significantly increased [\(^{68}\)Ga] Pentixafor uptake, while treatment with Wnt inhibitors decreased radiopeptide uptake. Wnt pathway modulation influences CXCR4 expression and function in NET cell lines. Wnt modulation might be a tool to enhance the efficacy of CXCR4-directed therapies in NET or to inhibit CXCR4-dependent proliferative signaling. The underlying mechanisms for the interaction of the Wnt pathway with CXCR4 expression and function have yet to be clarified.},
  language  = {en}
}
@article{BrandReimerReibetanzetal.2021,
  author    = {Brand, Markus and Reimer, Stanislaus and Reibetanz, Joachim and Flemming, Sven and Kornmann, Marko and Meining, Alexander},
  title     = {Endoscopic full thickness resection vs. transanal endoscopic microsurgery for local treatment of rectal neuroendocrine tumors - a retrospective analysis},
  series = {International Journal of Colorectal Disease},
  volume    = {36},
  journal   = {International Journal of Colorectal Disease},
  issn      = {0179-1958},
  doi       = {10.1007/s00384-020-03800-x},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-234833},
  pages     = {971-976},
  year      = {2021},
  abstract  = {Purpose Local treatment of small well-differentiated rectal neuroendocrine tumors (NETs) is recommended by current guidelines. However, although several endoscopic methods have been established, the highest R0 rate is achieved by transanal endoscopic microsurgery (TEM). Since a recently published study about endoscopic full thickness resection (eFTR) showed a R0 resection rate of 100\%, the aim of this study was to evaluate both methods (eFTR vs. TEM). Methods We retrospectively analyzed all patients with rectal NET treated either by TEM (1999-2018) or eFTR (2016-2019) in two tertiary centers (University Hospital Wuerzburg and Ulm). We analyzed clinical, procedural, and histopathological outcomes in both groups. Results Twenty-eight patients with rectal NET received local treatment (TEM: 13; eFTR: 15). Most tumors were at stage T1a and grade G1 or G2 (in the TEM group two G3 NETs were staged T2 after neoadjuvant chemotherapy). In both groups, similar outcomes for en bloc resection rate, R0 resection rate, tumor size, or specimen size were found. No procedural adverse events were noted. Mean procedure time in the TEM group was 48.9 min and 19.2 min in the eFTR group. Conclusion eFTR is a convincing method for local treatment of small rectal NETs combining high safety and efficacy with short interventional time.},
  language  = {en}
}