The Chinese Research Group of Gallbladder Cancer (CRGGC) is a retrospective multicenter registry cohort, collecting electronic medical records of patients diagnosed with gallbladder cancer from hospitals in collaboration.

The objectives of the CRGGC are as follows:

1. To study the current diagnosis and treatment of gallbladder cancer in China.
2. To clarify the prognostic role of debated risk factors associated with gallbladder cancer.
3. To improve the accurate staging of gallbladder cancer.
4. To standardize the treatment with gallbladder cancer.

Inclusion Criteria:

• Patients with at least clinical diagnosis of gallbladder cancer, including C23.9 and part of C24.0 (cystic duct cancer).
• Patients with accessible electronic medical record

Exclusion Criteria:

• Patients with undetermined primary site of cancer.

Patients from 2008 to 2020 diagnosed with gallbladder cancer in collaborated hospitals in China.

No plan for IPD access is scheduled.