Gastrointestinální trakt představuje častou lokalitu pro dobře diferencované neuroendokrinní tumory (NET). Jejich výskyt u pacientů s ulcerózní kolitidou (UC) není častý, je však dobře dokumentovaný. Případný kauzální vztah mezi rozvojem NET a chronickým zánětem střevní sliznice či dysplázií epitelu nicméně zůstává nejasný. Výskyt NET v ileálním pouchi u pacientů s UC byl dosud popsán jen v několika kazuistických sděleních. Prezentujeme zde případ takovéhoto nádoru vznikajícího ve sliznici pouche u pacienta s UC asociovanou s primární sklerozující cholangoitidou, který podstoupil transplantaci jater a restorativní kolektomii s následnou ileální pouch-anální anastomózou. Popis případu je doplněn o přehled dostupné literatury.
Gastrointestinal tract is the most common locality for well-differentiated neuroendocrine tumors (NET). While their occurrence in patients with ulcerative colitis (UC) is uncommon, it has been well documented. However, the causal relationship between development of NET and chronic intestinal inflammation or dysplasia remains controversial. The presence of NET in the ileal pouch in UC patients has been described only in a few reports to date. In this article, we present a case of such a tumor arising in the pouch in a patient with primary sclerosing cholangitis-associated UC, who underwent a restorative proctocolectomy with ileal pouch anal anastomosis and liver transplantation. The case is supported by a review of a relevant literature. Correspondence address: Ondrej Fabian Clinical and Transplant Pathology Centre Institute for Clinical and Experimental Medicine Videnska 1958/9 Prague, 14021 Czech Republic ondrej.fabian@ikem.cz; ondrejfabian5@gmail.com
- Publikační typ
- abstrakt z konference MeSH
BACKGROUND: Transplantation of pancreatic islets into subcutaneous cavities in diabetic rats may be as or even more effective than transplantation into the portal vein. Identifying the optimal timing of the individual steps in this procedure is critical. METHODS: Macroporous scaffolds were placed in the subcutaneous tissue of diabetic male Lewis rats for 7 or 28 d and the healing of the tissue inside the scaffolds was monitored. A marginal syngeneic graft comprising 4 islets/g of recipient body weight was transplanted at the best timing focusing mainly on vascularization. Recipients were monitored for blood glucose levels and tolerance tests. Histological examination was performed in all implanted scaffolds. The presence of individual endocrine cells was analyzed in detail. RESULTS: Blood glucose levels remained within the physiological range in all recipients until the end of experiment as well as body weight increase. Coefficients of glucose assimilation were normal or slightly reduced with no statistically significant differences between the groups 40 and 80 d after transplantation. Histological analysis revealed round viable islets in the liver similar to those in pancreas, but alpha cells practically disappeared, whereas islets in the scaffolds formed clusters of cells surrounded by rich vascular network and the alpha cells remained partially preserved. CONCLUSIONS: Subcutaneous transplantation of pancreatic islets is considerably less invasive but comparably efficient as commonly used islet transplantation into the portal vein. In consideration of alpha and beta cell ratio, the artificial subcutaneous cavities represent a promising site for future islet transplantation therapy.
- MeSH
- experimentální diabetes mellitus * chirurgie MeSH
- krevní glukóza MeSH
- krysa rodu rattus MeSH
- Langerhansovy ostrůvky * krevní zásobení chirurgie MeSH
- potkani inbrední LEW MeSH
- subkutánní tkáň MeSH
- transplantace Langerhansových ostrůvků * metody MeSH
- zvířata MeSH
- Check Tag
- krysa rodu rattus MeSH
- mužské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- MeSH
- extrakce zubů MeSH
- lidé MeSH
- mladiství MeSH
- studenti stomatologie MeSH
- trvalá zubní náhrada MeSH
- zubní kaz diagnóza terapie MeSH
- Check Tag
- lidé MeSH
- mladiství MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- srovnávací studie MeSH
