The NCCN Soft Tissue Sarcoma Guidelines include a subsection about treatment recommendations for gastrointestinal stromal tumors (GISTs). The standard of practice rapidly changed after the introduction of effective molecularly targeted therapy (such as imatinib and sunitinib) for GIST. Because of these changes, NCCN organized a multidisciplinary panel composed of experts in the fields of medica...

Context Gastrointestinal stromal tumors (GISTs) are mesenchymal tumors of the gastrointestinal tract arising from the interstitial cells of Cajal. Succinate dehydrogenase (SDH)-deficient GISTs are a unique class of GIST defined by loss of immunohistochemical expression of SDHB, indicating dysfunction of the mitochondrial complex 2; lack of driver mutations in KIT and PDGFRA; and distinctive mor...

BACKGROUND Gastrointestinal stromal tumours (GIST) are the most common mesenchymal tumours of the gastrointestinal tract with an increasing incidence. AIMS To review the biology, diagnosis and treatment of gastrointestinal stromal tumours. METHODS A PubMed search using the phrases 'Gastrointestinal stromal tumor', 'imatinib', 'c-kit'. RESULTS The diagnosis of GIST is established by histol...

The discovery of CD117 mutation in almost all gastrointestinal stromal tumors (GISTs) marked a milestone. Other spindle cell neoplasms arising from the GI tract including lipoma, schwannoma, hemangioma, leiomyoma, and leiomyosarcoma are typically CD117-negative. GIST research and clinical care now represent a paradigm of translating discoveries in the molecular pathogenesis of cancer into highl...

Endoscopists usually make a diagnosis in the submucosal tumor depending on the subjective evaluation about general images obtained by endoscopic ultrasonography. In this paper, we propose a method to extract areas of gastrointestinal stromal tumor (GIST) and lipoma automatically from the ultrasonic image to assist those specialists. We also propose an algorithm to differentiate GIST from non-GI...

Gastrointestinal stromal tumors (GIST) are the most common sarcomas of the gastrointestinal tract, with transformation typically driven by activating mutations of cKIT and less commonly platelet-derived growth factor receptor alpha (PDGFRA). Successful targeting of tyrosine-protein kinase Kit with imatinib, a tyrosine kinase inhibitor, has had a major impact in the survival of patients with GIS...

Gastrointestinal stromal tumors (GISTs) may be defined as morphologically spindle cell, epithelioid, or occasionally pleomorphic mesenchymal tumours of the gastrointestinal tract that usually express the KIT protein and harbour mutation of a gene that encodes for a type III receptor tyrosine kinase (either KIT or PDGFRA). In Caucasian populations their annual incidence is 10 to 15 cases per mil...

Collision tumors involving GIST are very rare. Herein, we report a collision tumor consisting of gastric gastrointestinal stromal tumor (GIST) and pancreatic ductal adenocarcinoma. The patient was a 76-year-old Chinese male, presenting with abdominal distension, haematemesis and melena. Both the CT scan images and the gross appearance demonstrated special features indicating the possibility of ...

Gastrointestinal stromal tumors (GISTs) have a rather wide morphologic spectrum. Here, we report a rare variant plexiform GIST in gastric antrum. Microscopically, the tumor showed plexiform or multinodular growth pattern, proliferation of spindle cells, presence of epithelioid cells, and abundant myxoid stroma with thin-walled blood vessels. The histologic features were similar to plexiform fib...

The Authors describe four cases of gastrointestinal stromal tumours (GIST) two of them were localized in the stomach, the others in the ileum. GIST are neoplasms of mesenchymal origin which develop inside the wall of the digestive tract. The most frequent site is the stomach, followed by the small bowel; less commonly these tumors can affect the oesophagus, the colon and the rectum. GIST origin...