Please select the eligibility criteria that correspond to the clinical trial below.
Title: The Effect and Mechanism of Improving Diabetes by Reconstruction Methods in Gastric Cancer Patients With DM Who Receive Surgical Treatment
Brief Summary: This study is to investigate the effect of gastrectomy on remission of type 2 diabetes in patients with gastric cancer and type 2 diabetes, to investigate the mechanism of blood glucose alteration and intestinal hormonal signaling by the reconstruction methods, and to evaluate the applicability and efficacy of Roux-en-Y gastrojejunostomy after gastrectomy in gastric cancer patients with diabetes.


Options:
A: Inclusion Criteria:

* Clinical diagnosis of distal gastric cancer
* underwent laparoscopy-assisted distal gastrectomy

Exclusion Criteria:

* have simultaneously other cancer
* have severe systemic inflammatory disease ,serious illness such as diabetes, chronic lung diseases
* have upper gastrointestinal surgery
* can't bear the gastric tube
* the period is too late or the tumor is too large to carry on a laparoscopy assisted radical distal gastrectomy
B: Inclusion Criteria:

* 18\<age\<75
* Gastric lesions were diagnosed as gastric adenocarcinoma by endoscopic biopsy
* The preoperative clinical stage is T1-4a,N0-3,M0(According to AJCC- 7th TNM tumor stage)
* It is expected that the results of R0 surgery can be obtained by performing distal gastrectomy and D2 lymph node dissection
* Preoperative ECOG performance status score 0/1
* Nutrition risk screening（NRS2002）
* Preoperative ASA score I-III
* Patient informed consent

Exclusion Criteria:

* Pregnancy or breastfeeding women
* Severe mental illness
* History of upper abdominal surgery
* History of gastric surgery (including ESD/EMR for gastric cancer)
* 3 years of history of other malignant diseases；
* Gastric cancer patients who have undergone neoadjuvant treatment or recommend neoadjuvant treatment
* A history of unstable angina or myocardial infarction within 6 months
* History of cerebral infarction or cerebral hemorrhage within 6 months
* There is a history of sustained systemic corticosteroid treatment within 1 month
* Needs simultaneous surgical treatment of other diseases；
* Gastric cancer complications (bleeding, perforation, obstruction) require emergency surgery
* Pulmonary function test FEV\<1 predicted value 50%
C: Inclusion Criteria:

* Patient who are older than 20 years and younger than 80 years
* Histologically confirmed gastric adenocarcinoma located lower one third of stomach
* Postoperative confirmed pT1N0, pT2N0, pT1N1
* Informed consent

Exclusion Criteria:

* Previous history of treatment for other malignancy or inflammatory disease
* Preoperative uncontrolled serious comorbidity
* Vulnerable Subjects(pregnant women, children, cognitively impaired persons etc.)
* Patient who experience any complications requiring reoperation following gastrectomy
D: Inclusion Criteria:

* Clinical diagnosis of distal gastric cancer
* underwent laparoscopy-assisted distal gastrectomy

Exclusion Criteria:

* have simultaneously other cancer
* have severe systemic inflammatory disease ,serious illness such as diabetes, chronic lung diseases
* have upper gastrointestinal surgery
* can't bear the gastric tube
* the period is too late or the tumor is too large to carry on a laparoscopy assisted radical distal gastrectomy

Answer: C