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TianlongLing Department of Gastrointestinal Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
TaoChen Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
Chun Zhuang Department of Gastrointestinal Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
LinTu Department of Gastrointestinal Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
Xin Wu Department of General Surgery, The First Medical Center, Chinese PLA General Hospital, Beijing, China

Translators

TaoWang Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
GanMao Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
XinyuZeng Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
Editors and Contributors
QianShen Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
QiJiang Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
JiaxianYu Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
Yao Lin Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
Chengguo Li Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
LeiYang Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
YongzhouHuang Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
BoNi Department of Gastrointestinal Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
WenchangYang Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
JianboLyu Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
PeiZhou Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
Peng Zhang Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
Editors and Contributors
xiii
Yuqiang Du Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
LiwuZeng Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
Xiaoqi Li Department of Gastrointestinal Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
TianlongLing Department of Gastrointestinal Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
Chen Huang Department of Gastrointestinal Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
Chun Zhuang Department of Gastrointestinal Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
Xinli Ma Department of Gastrointestinal Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
LinTu Department of Gastrointestinal Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
Linxi Yang Department of Gastrointestinal Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
Part I
Surgical Management of Gastrointestinal
Stromal Tumors
Laparoscopic Management ofGastrointestinal Stromal Tumors
TaoWang, MingWang, GanMao, JieJia, andHuiCao
1
Keywords
Gastrointestinal stromal tumor · Surgery · Laparoscopy Jejunum
1.1 Case 1 A64-Year-Old Man withGIST Who Underwent Laparoscopic Surgery
TaoWang and MingWang
1.1.1 Introduction
Surgical resection is the preferred treatment for locally resectable gastrointestinal stromal tumor (GIST). Surgery should follow the principles of complete tumor resection, avoiding tumor rupture, and ensuring negative histological margins. Open surgery was previously the dominant treat­ment for gastric GIST.In recent years, with the advancement of surgical technology and equipment and the promotion of minimally invasive procedures, laparoscopic surgery has become more widely used in the treatment of GIST, espe­cially gastric GIST [1].
1.1.2 Case Background
A 64-year-old man presented to the local hospital with repeated dull pain and discomfort in the right upper abdominal quadrant. A CT scan of the chest showed: a small streak shadow in both pulmonary lobes, a little bilateral pleural effusion, enlarged lymph nodes in the mediastinum and right hilar calcication foci, multiple cysts in the liver, gallbladder stones, and a space-occupy­ing lesion in the left upper abdominal quadrant. In light of these ndings, further examination was recommended. Subsequently, gastroscopy and abdominal enhanced CT were performed. Gastroscopy revealed a submucosal bulge with a diameter of 4.5cm in the fundus of the stom­ach, which was suspected to be a GIST. Enhanced CT revealed a space-occupying lesion at the bottom of the stomach, approximately 5.5cm×5.0cm in size (possible GIST); multiple cysts in the liver; multiple stones in the gallbladder; and multiple cysts on both kidneys. During the course of the disease, the patient had no discomfort such as nausea, vomiting, constipation, diarrhea, hematemesis, or melena. The patient was admitted to the hospital for further treatment.
1.1.2.1 Past History andFamily History
The patient was previously healthy and reported no drug allergies. The patient’s parents were alive, and there was no similar medical history within the family.
1.1.2.2 Physical Examination
The abdomen was at, without gastric or intestinal pattern
T. Wang · G. Mao · J. Jia (*) Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China e-mail: wangtaojx@hust.edu.cn; maogan@hust.edu.cn
M.Wang (*) · H. Cao Department of Gastrointestinal Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
© People’s Medical Publishing House, PR of China 2024 K. Tao, H. Cao (eds.), Clinical Management of Gastrointestinal Stromal Tumor, https://doi.org/10.1007/978-981-99-9392-5_1
and peristaltic waves. The abdomen was soft, without tender­ness, rebound tenderness, or palpable mass, and bowel sounds were normal.
1.1.2.3 Auxiliary Examination
Gastroscopy A submucosal bulge, suspected to be GIST,
4.5cm in diameter, was seen in the fundus of the stomach.
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Supercial atrophic gastritis with erosion and duodenal papilla erosion was observed. The pathology showed moder­ate chronic active inammation of the mucosa with the for­mation of lymphoid follicles.
Abdominal CT A space-occupying lesion was found at the fundus of the stomach, considered to be a possible GIST. Furthermore, multiple cysts in the liver, multiple stones in the gallbladder, and multiple cysts in both kidneys were observed (Fig.1.1).
Initial Diagnosis
1. Fundus GIST
2. Gallbladder stones with cholecystitis
3. Multiple cysts in the liver
1.1.3 Therapy
1.1.3.1 Case Analysis
The patient was an elderly man, who visited the hospital fol­lowing the accidental nding of a gastric fundus mass in the course of diagnosing and treating gallbladder stones. Imaging and gastroscopy suggested the possibility of GIST in the fun­dus of the stomach. The patient was generally in good condi­tion, and the tumor was deemed to be resectable. No metastasis was found, and surgery could be performed. Since the gastric tumor was located in the fundus of the stomach, it was suitable for laparoscopic surgery, and laparoscopic cho-
lecystectomy could also be performed at the same time. Postoperative treatment was to be based on the results of pathology and genetic testing.
1.1.3.2 Treatment
The patient underwent laparoscopic gastric tumor resection with cholecystectomy on October 17, 2018. The gallbladder was approximately 7.0cm× 5.0 cm ×3.0cm in size. The gallbladder wall was rough, and the gallbladder contained three mixed stones, all of which were approximately 1cm in diameter. The common bile duct was not dilated. A tumor with a diameter of 5cm was found on the upper portion of the greater curvature of the stomach, protruding into and out of the gastric cavity. The mass originated from the submu­cosa, and there was no swelling of the peri-gastric lymph nodes. After the fundus and upper part of the stomach were fully freed during the operation, the tumor was removed using a linear cutting and closing device (Fig. 1.2). The excised tumor was placed in an extraction bag and the umbil­ical incision was extended to allow for the removal of the specimen.
1.1.3.3 Postoperative Pathology andGenetic Testing
Pathological Diagnosis Gastric GIST, 5.5cm × 5.0cm ×
5.0cm in size, mitotic count 4/50 HPF (Fig.1.3).
Immunohistochemistry CD117 (+), DOG-1 (+), CD34
(+), SMA (), S-100 (), Ki-67 (Li: 3%), SDHB (+).
Fig. 1.1 A space-occupying lesion of the gastric fundus
1 Laparoscopic Management ofGastrointestinal Stromal Tumors
5
patient received 400mg/d imatinib as adjuvant therapy, the general condition of the patient was good and there were no obvious side effects. After taking imatinib for 1 year, the drug was discontinued. During the regular follow-up for 39months after the operation, no recurrence or metastasis of GIST occurred in the patient.
1.2 Case 2 ACase ofLaparoscopic Surgery forJejunal GIST
GanMao and JieJia
1.2.1 Introduction
Fig. 1.2 Complete tumor resection with a laparoscopic linear cutting
stapler
Fig. 1.3 Gross specimen
Genetic Testing A heterozygous mutation was found on
exon 11 of KIT, 559GTT>GAT. This mutation caused the encoded amino acid to be converted from valine to aspartic acid. The 9, 13, and 17 exons of KIT and the 12 and 18 exons of PDGFRA were all wild type.
1.1.4 Prognosis
The patient followed a liquid diet for 3days after surgery and was discharged 5days after surgery. The pathological exami­nation results conrmed the diagnosis of GIST with a mod­erate risk of recurrence. During outpatient follow-up, the
The growth of jejunoileal GIST is relatively insidious, and small asymptomatic GIST is rarely found based on clinical manifestations. Jejunoileal GIST has a high malignant potential [2]. Therefore, surgical resection should be actively performed. Laparoscopic surgery is safe and feasible for small GIST (those with a diameter of 5 cm), when the tumor is relatively free [3]. In addition, laparoscopic tech­niques are of great value for judging the position of GIST in the small bowel during operation.
1.2.2 Case Background
The patient, a 52-year-old man, had tarry stool, twice a day, with no obvious cause, which started 1week ago. This was accompanied by nausea and vomiting. He was admitted to the hospital for treatment.
1.2.2.1 Past History andFamily History
The patient reported that he was usually in good health and had no history of allergies. The patient’s parents were in good health and there was no similar medical history in the family.
1.2.2.2 Physical Examination
The abdomen was at and soft, without palpable masses. The liver and spleen are not palpable below the costal mar­gin, and there was no tenderness or rebound tenderness. There was also no percussion pain in the kidney area, or shifting dullness, and bowel sounds were normal.
1.2.2.3 Auxiliary Examination
Blood Routine WBC 4.70×109 /L, RBC 5.37×1012/L, Hb 142g/L, PLT 216×109/L, NEUT% 59.1%, LY% 32.2%.
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T. Wang et al.
Blood Biochemistry TBil 9.2μmol/L, DBil 4.5μmol/L, TP
78.0g/L, ALB 50.9g/L, Cre 88.1μmol/L, BUN 3.12mmol/L, Na+ 141.2mmol/L, K+ 4.53mmol/L, Cl− 96.7mmol/L.
Abdominal CT A whole abdomen scan with enhanced CT on December 14, 2018, showed that the segmental wall of the jejunum in the left lower abdomen was thickened, with a range of approximately 3.4 cm × 3.0 cm. Enhanced CT showed obvious enhancement of the lesion. The adjacent serosal surface was smooth, and there were no obviously enlarged lymph nodes around the lesion. The results were suggestive of GIST. No other abnormalities were detected (Fig.1.4).
Initial Diagnosis Jejunal GIST.
1.2.3 Therapy
1.2.3.1 Case Analysis
The patient was a middle-aged man who presented to the doctor with tarry stools for a week. After completing the rel­evant examinations, the preliminary diagnosis was consid­ered to be a GIST in the jejunum which was approximately
3.4cm×3.0cm in size. Because the tumor did not appear to invade the surrounding organs or tissues and had a small diameter, it was suitable for laparoscopic resection. Postoperative treatment was to be guided based on the results of pathology and genetic testing.
tumor resection on December 20, 2018. Intraoperative exploration revealed that the tumor was located at the jeju­num, 100 cm away from Treitz ligament, with a size of approximately 4.0cm×3.0cm. A laparoscopic linear cut­ting stapler was used to resect the jejunum with a margin of 1cm from the tumor. The tumor was placed in an extraction bag, and extracted through the umbilical incision. Subsequently a side-to-side jejunal anastomosis was per­formed to close the intestinal cavity. Absorbable thread was intermittently sutured to reinforce the anastomosis. The laparoscopic access points were sutured and the operation was deemed successful. The operation time was 60min, and the intraoperative blood loss was approximately 20 mL (Figs.1.5 and 1.6).
1.2.3.3 Postoperative Pathology andGenetic Testing
Pathological Diagnosis Jejunal GIST.The size of the mass was 3.5cm×2.0cm, mitotic count 5/50 HPF.According to the modied National Institutes of Health (NIH) risk classi­cation the tumor was low risk.
1.2.3.2 Treatment
The patient underwent preoperative preparation following the concept of enhanced recovery after surgery (ERAS) as well as underwent laparoscopic exploration and jejunal
Fig. 1.4 The jejunal tumor
Fig. 1.5 Dissection of the proximal jejunum
Fig. 1.6 Side-to-side anastomosis of jejunum
1 Laparoscopic Management ofGastrointestinal Stromal Tumors
7
Immunohistochemistry CD117 (+), DOG-1 (+), CD34 (+), SMA (), S-100 (), Ki-67 (Li: <5%).
Genetic Testing Heterozygous mutation in exon 11 of KIT, the mutation type was p.Y570_P573dup; exon 12 and 18 of PDGFRA were wild type.
1.2.4 Prognosis
The patient recovered well after the operation and was dis­charged on the fth postoperative day. No targeted drug ther­apy was administered after the operation as the tumor was classied as low-risk. As of January 2022, the patient had been followed up for 37months without recurrence.
1.2.5 Experience ofDiagnosis andTherapy
1.2.5.1 The Feasibility andControversy ofLaparoscopic Surgery forGIST
In the past, laparotomy was the primary surgical procedure performed for the treatment of gastric GIST. Since GIST rarely metastasizes through a lymphatic route, it is generally sufcient to ensure a negative margin by wedge resection [4]. Therefore, in recent years, the updated guidelines have supported the application of laparoscopic surgery for gastric GIST and gradually relaxed the indications [1, 5]. However, tumor rupture is still an independent, poor prognostic factor for GIST [6]. Once a tumor ruptures into the abdominal cav­ity, the risk of recurrence is extremely high. Therefore, the possibility of GIST tumor being fragile and easy to rupture limits the application of laparoscopic surgery. Chinese con­sensus guidelines for GIST highlights that that these indica­tions should be strictly controlled when choosing laparoscopic surgery to treat GIST, and the operation should be carefully regulated [5]. Laparoscopy is not recommended for patients with large tumors, difcult operations, or those who require combined organ resection.
1.2.5.2 Basic Principles ofLaparoscopic Surgery forGIST
Laparoscopic surgery for GIST also follows the basic prin­ciples of open surgery. The principle of “less contact, less squeezing” should be followed during the operation, and care should be taken to avoid tumor rupture and spreading, leading to abdominal implantation or blood metastasis. Therefore, it is necessary to use an extraction bag after resec­tion. Removing the tumor in small portions to allow for min­imally invasive surgery with small incisions should be avoided as this can affect the pathological evaluation after surgery.
1.2.5.3 Laparoscopic Surgery Treatment Strategies forGIST inDierent Locations
The current guideline consensus is that laparoscopic tech­niques are recommended for GIST with small tumor diam­eters and when the tumor is located in a favorable anatomical location (such as the anterior wall of the stomach, the greater curvature of the stomach, jejunum, or ileum). However, no prospective clinical research has been con­ducted to determine whether relatively small GIST, located in difcult anatomical sites (such as posterior gastric wall, lesser curvature of the stomach, near the cardia, near the pylorus), are also suitable for laparoscopic surgery. From the limited retrospective research data and clinical practice in our hospital, it is safe and feasible to perform laparo­scopic surgery for some gastric GIST in difcult anatomi­cal locations [7], but there are certain differences for surgical treatment strategies based on different anatomical regions and size restrictions. It is more suitable to close the gastric cavity using manual rather than instrumental sutur­ing after resection, and the dual- mirror technique is recommended.

1.3 Expert Comments

HuiCao
Laparoscopic treatment strategies vary depending on the size, anatomical location, and different gross growth pat­terns of GIST. For example, a GIST on the greater curva­ture and fundus of the stomach can often be resected with an intracavitary cutting closure device. While for a GIST on the minor curvature, adjacent to the cardia or pylorus, it is more difcult to use an intracavitary cutting closure device for resection, and closure often requires involve­ment of a portion of local gastric wall. Manual suturing after resection requires greater surgical skills for the sur­geon and identifying the location of small GIST that com­pletely protrude into the cavity may need to rely on intraoperative gastroscopy.
Compared to open surgery, laparoscopic surgery has the advantages of small incisions, better vision, less bleeding, and less pain [8]. However, GIST are brittle and prone to rupture, and the postoperative recurrence rate will be greatly increased. Therefore, whether laparoscopic surgery can be used for GIST with large diameters or complex anatomical locations is still controversial. Surgeons who have received rigorous training in laparoscopic techniques need to fully evaluate the difculty of tumor resection and the risk of tumor rupture during the perioperative period while focusing on minimally invasive surgery and choose the best surgical method to maximize patient benets.
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References

1. von Mehren M, Randall RL, Benjamin RS, Boles S, Bui MM, Ganjoo KN, George S, Gonzalez RJ, Heslin MJ, Kane JM, Keedy V, Kim E, Koon H, Mayerson J, McCarter M, McGarry SV, Meyer C, Morris ZS, O’Donnell RJ, Pappo AS, Paz IB, Petersen IA, Pfeifer JD, Riedel RF, Ruo B, Schuetze S, Tap WD, Wayne JD, Bergman MA, Scavone JL. Soft tissue sarcoma, version
2.2018, NCCN clinical practice guidelines in oncology. J Natl Compr Cancer Netw. 2018;16(5):536–63. https://doi.org/10.6004/
jnccn.2018.0025.
2. Dematteo RP, Gold JS, Saran L, Gönen M, Liau KH, Maki RG, Singer S, Besmer P, Brennan MF, Antonescu CR. Tumor mitotic rate, size, and location independently predict recurrence after resec­tion of primary gastrointestinal stromal tumor (GIST). Cancer. 2008;112(3):608–15. https://doi.org/10.1002/cncr.23199.
3. Liao CH, Yeh CN, Wang SY, Fu CY, Tsai CY, Liu YY, Cheng CT, Yeh TS. Surgical option for intestinal gastrointestinal stromal tumors-
-perioperative and oncological outcomes of laparoscopic surgery. Anticancer Res. 2015;35(2):1033–40. https://ar.iiarjournals.org/
content/35/2/1033.long
4. Güller U, Tarantino I, Cerny T, Schmied BM, Warschkow R. Population-based SEER trend analysis of overall and cancer-
specic survival in 5138 patients with gastrointestinal stromal tumor. BMC Cancer. 2015;15:557–68. https://doi.org/10.1186/
s12885- 015- 1554- 9.
5. Li J, Ye Y, Wang J, Zhang B, Qin S, Shi Y, He Y, Liang X, Liu X, Zhou Y, Wu X, Zhang X, Wang M, Gao Z, Lin T, Cao H, Shen L, Chinese Society of Clinical Oncology Csco Expert Committee On Gastrointestinal Stromal Tumor. Chinese consensus guidelines for diagnosis and management of gastrointestinal stromal tumor. Chin J Cancer Res. 2017;29(4):281–93. https://doi.org/10.21147/j.
issn.1000- 9604.2017.04.01.
6. Blay JY, Kang YK, Nishida T, von Mehren M. Gastrointestinal stromal tumours. Nat Rev Dis Primers. 2021;7(1):22. https://doi.
org/10.1038/s41572- 021- 00254- 5.
7. Xiong Z, Wan W, Zeng X, Liu W, Wang T, Zhang R, Li C, Yang W, Zhang P, Tao K.Laparoscopic versus open surgery for gastric gas­trointestinal stromal tumors: a propensity score matching analysis. J Gastrointest Surg. 2020;24(8):1785–94. https://doi.org/10.1007/
s11605- 019- 04318- 6.
8. Hu J, Or BH, Hu K, Wang ML.Comparison of the post-operative outcomes and survival of laparoscopic versus open resections for gastric gastrointestinal stromal tumors: a multi-center prospec­tive cohort study. Int J Surg. 2016;33(Pt A):65–71. https://doi.
org/10.1016/j.ijsu.2016.07.064.
Laparoscopic Combined withEndoscopic Management ofGastrointestinal Stromal Tumors
XinyuZeng, MingWang, QianShen, HuikuanChu, andGangZhao
2
Keywords
Gastrointestinal stromal tumors · Laparoscopy surgery Endoscopic surgery · Laparoscopy · Endoscopy Cooperation
2.1 Case 3 A41-Year-Old Woman withGIST Who Underwent Laparoscopic andEndoscopic Cooperative Surgery
XinyuZeng and MingWang
2.1.1 Introduction
Laparoscopic and endoscopic cooperative surgery has emerged as a minimally invasive surgical technique for GIST in recent years. In the past, when laparoscopy was performed alone, it was not easy to detect small lesions (tumor diameter <2cm) due to the lack of ne tactile sensation [1]. In addi­tion, due to the limitation of laparoscopic instruments, it is more difcult to assess the posterior wall of the gastroduode­num and intraluminal tumors during exploration, which eas­ily leads to the omission of lesion resection and procedure
X. Zeng · Q. Shen Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China e-mail: zengxy@hust.edu.cn; m202175880@hust.edu.cn
M. Wang (*) · G. Zhao Department of Gastrointestinal Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
H. Chu (*) Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China e-mail: 2012XH0827@hust.edu.cn
conversion to laparotomy [2]. In this case, intraoperative gastroscopy to locate the lesion was particularly necessary to ensure the smooth progress of laparoscopic surgery. In addi­tion, as GIST lesions found under gastroscopy generally originate from the muscularis propria, the risks of treatment using gastroscopy alone are greater, and the operation time is increased. The use of laparoscopy can assist endoscopic pro­cedures, through timely detection and management of com­plications arising from endoscopic resection, therefore increasing surgical safety and efciency [3]. Laparoscopic and endoscopic cooperative surgery combines the advan­tages of laparoscopy and endoscopy, counteracts the disad­vantages of laparoscopy or endoscopy alone, and further expands the scope of application for minimally invasive sur­gical techniques.
2.1.2 Case Background
A 41-year-old woman presented with abdominal distension accompanied by nausea without vomiting, dizziness, head­ache, fatigue, and blackouts after eating greasy food in July
2018. Upon coughing, the patient produced a small amount of white sputum, but the patient did not report hemoptysis, chest pain, chest tightness, or other symptoms. The patient had a normal high-salt diet. The patient then visited a local hospital on August 10, 2018. Gastroscopy showed atrophic gastritis, a local gastric bulge (this was described as a sub­mucosal lesion and endoscopic ultrasonography was recom­mended) and antral polypoid change. Gastric mucosal biopsy pathology showed chronic non-atrophic gastritis (acute active stage) in the antrum and Helicobacter pylori (HP) infection. Anti-HP treatment was administered at another hospital, and the patient’s subjective symptoms were relieved 2 weeks later. For further treatment, the patient visited Renji Hospital, Shanghai Jiaotong University School of Medicine. On August 20, 2018, ultrasonic gas­troscopy showed possible gastric GIST. On August 25,
© People’s Medical Publishing House, PR of China 2024 K. Tao, H. Cao (eds.), Clinical Management of Gastrointestinal Stromal Tumor, https://doi.org/10.1007/978-981-99-9392-5_2
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