نتایج جستجو برای: neuroendocrine

تعداد نتایج: 20927  

2012
Fritz Ihler Elena Viviana Vetter Jie Pan Robert Kammerer Svenja Debey-Pascher Joachim L. Schultze Wolfgang Zimmermann Georg Enders

BACKGROUND A large fraction of murine tumors induced by transgenic expression of SV40 large T antigen (SV40 TAg) exhibits a neuroendocrine phenotype. It is unclear whether SV40 TAg induces the neuroendocrine phenotype by preferential transformation of progenitor cells committed to the neuroendocrine lineage or by transcriptional activation of neuroendocrine genes. METHODOLOGY/PRINCIPAL FINDIN...

2012
Marinos Pericleous Christos Toumpanakis Heather Lumgair Martyn E. Caplin Luke Morgan-Rowe Ian Clark Tu Vinh Luong

Most gastric neuroendocrine tumours are well differentiated and considered as neuroendocrine neoplasms, whilst poorly differentiated lesions are considered as neuroendocrine carcinomas and account for only 6-16% of gastric neuroendocrine tumours. Gastric mixed adenoneuroendocrine carcinomas are rare malignancies usually composed of a neuroendocrine carcinoma and an adenocarcinoma with a variabl...

Journal: :Brazilian journal of otorhinolaryngology 2014
Yee Hyuk Kim Sang Heun Lee Da Jung Jung

Neuroendocrine adenomas of the middle ear (NEAME) are rare tumors.1-4 Whereas neuroendocrine cells are normally found in the lung and gastrointestinal tract, they are normally not found in the middle ear (ME) mucosa.1-6 Although neuroendocrine tumors were initially believed to originate from the neuroendocrine cell system, it is now known that they may originate from tissue that lacks neuroendo...

2009
Mücteba Gündüz Yalın İşcan Yeşim Erbil Mahmut Müslümanoğlu

Neuroendocrine tumors are rarely seen in the breast. They are commonly located in the gastrointestinal tract and the lungs. These tumors of the breast may be purely neuroendocrine or neuroendocrine diff erentiated. Some breast tumors may have neuroendocrine foci. The clinical signifi cance of these tumors are unclear. However, they are thought to have no relation with the prognosis and patient ...

Journal: :International journal of reproduction, contraception, obstetrics and gynecology 2022

Neuroendocrine tumours constitute heterogenous group of cancers that arise from cells in our body which have neuroendocrine cells-mostly gastro intestinal tract and lungs. They are further divided into low grade, high grade poorly differentiated ones. It is rare pregnancy it poses diagnostic challenge even among experts the speciality. So, multi-disciplinary approach to management carcinomas (N...

2014

1. Incipient neuroendocrine neoplasia: Dysplasia/Tis 2. True neuroendocrine tumors a. Well differentiated NETs (carcinoids, pancreatic neuroendocrine neoplasms) b. High-grade neuorendocrine carcinoma 3. Hybrid tumors a. Mixed tumors i. Mixed adenocarcinoma-neuorendocrine carcinoma ii. Mixed neuorendocrine tumor and non-neuroendocrine carcinoma iii. Duodenal gangliocytic paraganglioma b. Inciden...

Journal: :Tumori 2009
Emilio Bajetta Laura Catena Monika Ducceschi Sara Pusceddu Massimo Milione Marco Maccauro Roberto Bajetta Giuseppe Procopio Roberto Buzzoni Barbara Formisano Lorenza Di Guardo Marco Platania

AIMS AND BACKGROUND Carcinoids are infrequent neoplasms arising from neuroendocrine cells. Due to blurred symptoms and the presence of equivocal diagnostic findings, these tumors are sometimes misdiagnosed. Therefore, increased rates of false neuroendocrine tumors represent an emerging problem in clinical practice. Our aim is to alert clinicians on this matter by supplying them with useful warn...

Journal: :AJNR. American journal of neuroradiology 2000
U S Kanamalla P P Kesava H S McGuff

The imaging and pathologic features of three cases of nonlaryngeal neuroendocrine carcinoma of the head and neck are described. Neuroendocrine carcinomas represent malignant epithelial neuroendocrine neoplasms and are classified as three types: typical carcinoid (well differentiated), atypical carcinoid (moderately differentiated), and small cell neuroendocrine (poorly differentiated) carcinoma...

Journal: :Journal of the National Comprehensive Cancer Network : JNCCN 2006
Orlo H Clark Jaffer Ajani Al B Benson David Byrd Gerard M Doherty Paul F Engstrom David S Ettinger John F Gibbs Martin J Heslin Fouad Kandeel Anne Kessinger Matthew H Kulke Larry Kvols Albert A Nemcek John A Olson Thomas W Ratliff Leonard Saltz David E Schteingart Manisha H Shah Stephen Shibata

Neuroendocrine tumors comprise a broad family of tumors, the most common of which are carcinoid and pancreatic neuroendocrine tumors. The NCCN Neuroendocrine Tumors Guidelines discuss the diagnosis and management of both sporadic and hereditary neuroendocrine tumors. Most of the recommendations pertain to well-differentiated, low- to intermediate-grade tumors. This updated version of the NCCN G...

2007
Sheng-Rong Zou Zhong-Wei Guo Yu-Jing Peng Ta Zhou Chang-Gui Gu Da-Ren He

In this paper, we present the empirical investigation results on the neuroendocrine system by bipartite graphs. This neuroendocrine network can describe the structural characteristic of neuroendocrine system. The act degree distribution and cumulate act degree distribution show so-called “shifted power law” (SPL) function forms. And the similarity of neuroendocrine network is s = 0.14. Our resu...

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