作者: Lesly A. Dossett , Nipun B. Merchant
DOI: 10.1007/978-1-4939-1423-4_28
关键词: Cancer research 、 Stromal tumor 、 Tyrosine-kinase inhibitor 、 Sarcoma 、 Tyrosine kinase 、 GiST 、 Imatinib 、 Interstitial cell of Cajal 、 Medicine 、 PDGFRA
摘要: Gastrointestinal stromal tumors (GISTs) are the most common sarcoma of GI tract and account for 1–3 % all malignancies. GISTs arise from interstitial cells Cajal, an intestinal pacemaker cell located in around myenteric plexus. They typically stomach (65–70 %) or small intestine (25–45 %). An important immunohistochemical marker is KIT, a membrane receptor with tyrosine kinase activity that present (80–95 Some (5–7 have mutation platelet-derived growth factor alpha (PDGFRA) instead. Several factors including tumor site, size greater than 5 cm, mitoses per 50 high-power field predict aggressive behavior recurrence. The treatment localized resection. Systemic chemotherapy radiation ineffective. inhibitor imatinib improves progression-free survival patients metastatic disease, its use adjuvant neoadjuvant settings increasingly common. Many ultimately develop resistance, these patients, dose escalation another recommended.