Malignant Gastric Gastrointestinal Stromal Tumor

In this clinical trial, the safety, tolerability, and preliminary antitumor activity of ziftomenib in combination with imatinib will be evaluated in adults with gastrointestinal stromal tumors (GIST) who have been treated previously with imatinib.

研究健康受试者餐后单次口服受试制剂甲磺酸伊马替尼片（山东鲁抗医药股份有限公司，规格：400mg）与参比制剂甲磺酸伊马替尼片（商品名：Glivec®，规格：400mg）在吸收程度和速度方面是否存在差异，评价受试制剂和参比制剂在餐后条件下给药时的生物等效性，观察受试制剂和参比制剂在健康受试者中的安全性。

Gastrointestinal stromal tumors (GISTs) are the most common submucosal tumors (SMTs) of the stomach. The 2022 European Society of Oncology ESMO Diagnosis and Treatment Guidelines recommend that GISTs undergo biopsy with a clear pathological diagnosis and should be removed unless there are significant complications. But currently, the diagnostic rate of EUS-FNA for upper gastrointestinal subcutaneous lesions is less than 60%. In recent years, mucosal cutting biopsy (MCB) has become an effective method for diagnosing SMTs. Regardless of whether the SMTs are large or small, the application of MCB technology can quickly obtain pathological tissue under direct visualization, and its immunohistochemical pathological diagnosis rate is relatively satisfactory. MCB technology has great potential in the biopsy of SMTs, but there is currently no comparison of results between two technologies in randomized controlled trials. The purpose of this study is to design a randomized controlled trial to compare the diagnostic rates of EUS-FNA and MCB techniques for tissue pathology (including immunohistochemistry) of SMTs, in order to improve the diagnostic accuracy of SMTs in our hospital and improve patient prognosis.