Search results for "Stromal tumor"

The histology of ovarian cancer: worldwide distribution and implications for international survival comparisons (CONCORD-2).

2016

OBJECTIVE: Ovarian cancers comprise several histologically distinct tumour groups with widely different prognosis. We aimed to describe the worldwide distribution of ovarian cancer histology and to understand what role this may play in international variation in survival. METHODS: The CONCORD programme is the largest population-based study of global trends in cancer survival. Data on 681,759 women diagnosed during 1995-2009 with cancer of the ovary, fallopian tube, peritoneum and retroperitonum in 51 countries were included. We categorised ovarian tumours into six histological groups, and explored the worldwide distribution of histology. RESULTS: During 2005-2009, type II epithelial tumours…

Design of antitumor drugs targeting c-kit receptor by a new mixed ligand-structure based method

2020

An important challenge, in the medicinal chemistry field, is the research of novel forceful drugs to overcome tumor-acquired resistance. The c-Kit tyrosine kinase receptor (TKR) represents a suitable target for the carcinogenesis control of gastro-intestinal stromal (GIST), leukemia, and mastocytosis tumors; nevertheless, several hotspot mutations of the protein limit the efficacy of a few clinical administered TKRs inhibitors. In this study, a new in silico protocol based on ligand and structure-based combined method is proposed, with the aim to identify a set of new c-Kit inhibitors able to complex c-Kit mutated proteins. A recent and freely available web-server DRUDIT is used for the lig…

Imaging of Gastrointestinal Stromal Tumors: From Diagnosis to Evaluation of Therapeutic Response

2016

Once considered an obscure tumor entity with poor prognosis, gastrointestinal stromal tumors (GISTs) are nowadays recognized as the most common mesenchymal tumors of the alimentary tract. GISTs differ from other mesenchymal neoplasms at pathology since 90% of them exhibit strong immunohistochemical staining for KIT, a tyrosinase kinase growth factor receptor. In the early 2000s, the ability of imatinib mesylate, a tyrosine kinase inhibitor, to inhibit KIT established a new paradigm for cancer treatment. A reduction in lesion size may not be observed or may appear many months after therapy; thus, tumor response criteria alternative to the Response Evaluation Criteria in Solid Tumors were dev…

Gastrointestinal stromal tumor (GIST): 40-row multislice computed tomography findings

2006

Predictive Factors of Response to Sunitinib in Imatinib-Resistant Gastrointestinal Stromal Tumors (GISTs): A Multi-Institutional Study

2019

Imatinib 400 mg is the standard of care for medical treatment of advanced GISTs. In the majority of cases, however, GISTs eventually develop resistance to imatinib. The optimal second line treatment has not been established yet and imatinib dose escalation (800 mg) or sunitinib represent two feasible options. The objective of this retrospective, multi-institutional, study is to analyze the validity of several parameters as possible predictive factors of response to sunitinib after imatinib failure. We reviewed 128 metastatic GISTs treated with sunitinib between January 2007 to June 2017. Primary tumour site, metastatic site, c-KIT/PDGFR-α mutational status, PET-FDG status and type…

Testicular tumors in childhood: a national report

1993

The authors report preliminary data of an Italian multicentric, retrospective study of primary testicular tumors (PTT) in childhood involving 20 Italian departments of pediatric surgery. Forty cases of PTT were observed during a 10-year period (1977–1987), with yolk-sac tumors being the most frequent (45%). Most testicular tumors were first perceived as a unilateral testicular mass. Scrotal ultrasonography represents the main diagnostic investigation, together with serum marker levels.

Not all KIT 557/558 codons mutations have the same prognostic influence on recurrence-free survival: breaking the exon 11 mutations in gastrointestin…

2021

Background: Although the gastrointestinal stromal tumor (GIST) genotype is not currently included in risk-stratification systems, a growing body of evidence shows that the pathogenic variant (PV) type and codon location hold a strong prognostic influence on recurrence-free survival (RFS). This information has particular relevance in the adjuvant setting, where an accurate prognostication could help to better identify high-risk tumors and guide clinical decision-making. Materials and Methods: Between January 2005 and December 2020, 96 patients with completely resected GISTs harboring a KIT proto-oncogene receptor tyrosine kinase ( KIT) exon 11 PV were included in the study. We analyzed the t…

Small bowel gastrointestinal stromal tumor presenting with gastrointestinal bleeding in patient with type 1 Neurofibromatosis: Management and laparos…

2021

Highlights • A multidisciplinary team is mandatory for the correct management of hemorrhagic GIST and its complications. • There is a well-known association between type 1 Neurofibromatosis and GIST. • Type 1 Neurofibromatosis-GIST and sporadic GIST have different behaviour. • In case of localised and resectable GIST surgical treatment is the mainstay. • Laparoscopic approach, if performed correctly, is safe and effective with better short-term outcomes then open surgery.

Combined endo-laparoscopic treatment of large gastrointestinal stromal tumor of the stomach: Report of a case and literature review

2020

Highlights • We report a case of 75-year-old Caucasian men with unknown voluminous gastric GIST, who came to our attention complaining melena. We decided to perform a laparoscopic-endoscopic combined surgical approach. • Intraoperative endoscopy identified gastric GIST and confirmed the submucosal origin and the integrity of the capsule. A 10 cm laparoscopic gastrotomy was carried out along the gastric found in order to realize a laparo-endoscopic rendez-vous technique. • Laparoscopy has rapidly become a preferable approach for gastric GISTs surgical treatment. The magnified view and the lesser invasiveness of laparoscopic technique allow the surgeon to perform a more meticulous dissection,…

Radiologie des gastrointestinalen Stromatumors (GIST). Gleichzeitig ein Beitrag zum Carney-Syndrom

2000

Gastrointestinal stromal tumors (GIST) represent an extremely rare group of tumors, which are mostly of smooth muscle origin like leiomyomas, leiomyosarcomas and leiomyoblastomas. With the introduction of immunohistochemical analysis an epitheloid and an autonomic nerve variant can be distinguished. The purpose of this review is to demonstrate the image morphological appearance of these rare tumors together with the pathology based upon a retrospective analysis of five of our own cases since 1997. There are no pathognomonic imaging findings for characterizing a gastrointestinal stromal tumor; however, it should be included in the differential diagnosis if one or multiple large, round or ova…