GIST

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Gastrointestinal Stromal Tumour. A relatively uncommon mesenchymal tumour of the gastrointestinal tract; two-thirds arise in the stomach, nearly one-third in the small intestine and less than 10% elsewhere. They are often incidental findings at endoscopy—especially in Japan due to mass screening for gastric cancer—or at surgery for other causes
Epidemiology More common in the middle-aged to elderly
DiffDx Leiomyoma, schwannoma, sarcoma, adenocarcionoma, ectopic pancreas
Management Most GISTs respond well to the tyrosine-kinase inhibitor imatinib mesylate (Gleevec/STI-571)

GIST

Gastrointestinal stromal tumor, see there.

GIST

gastrointestinal stromal tumor.
References in periodicals archive ?
Gastrointestinal stromal tumor (GIST) is a type of soft tissue tumor occurring primarily in the digestive system.
Exon 11 was involved in 15 cases, and exon 9 and exon 17 in one case each, in the GISTs with KIT mutation.
We are reporting the laparoscopic resection of GIST in a 67 year old male who had presented with haematemesis.
A schematic approach is being attempted in order to shed light on the various forms of GISTs.
PI3K/AKT/mTOR pathway is activated after imatinib secondary resistance in gastrointestinal stromal tumors (GISTs).
In total, 27 patients with GISTs underwent surgical treatment and were followed up at the Gaziosmanpasa Taksim Training and Research Hospital from 2002 to 2016.
The established treatment for localised GISTs is a complete surgical resection.
The CT and endoscopic ultrasound images suggested that the lesions in both stomach and duodenum were likely to be GISTs.
Patients and Methods: A total of 63 diagnosed cases of GISTS suitable by inclusion criteria were included in the study.
According to the latest NCCN guidelines, a CT (computed tomography) scan of the abdomen/pelvis is the initial workup for the evaluation, staging, and monitoring of treatment response in a GIST. GISTs typically showed a well-defined soft tissue of relatively low density, which is homogenous on a contrast-enhanced CT scan (Figure 1).
The SMTs are divided into three major categories including myogenic tumors (leiomyomas or leiomyosarcomas), neurogenic tumors (schwannomas, granular cell tumors, and neurofibromas), and GISTs [3].