The epidemiological study of tumor complicated with kidney disease can clarify the prevalence and risk factors of renal injury when malignant tumor is diagnosed, and understand the impact of malignant tumor complicated with renal injury on survival time. This study will bring enlightenment to clinicians, discover high-risk factors in time, and try to avoid renal damage factors in diagnosis and treatment. Early diagnosis and early treatment can partially terminate the progress of renal injury, avoid the suspension of treatment due to renal reasons, and avoid the occurrence of end-stage renal failure (ESRD).

1. To determine the prevalence of malignant tumor complicated with renal injury and analyze the related risk factors.
2. To compare the survival time of malignant tumor with or without renal injury

Inclusion Criteria:

• Malignancy confirmed by pathology.
• Between 18-80 years old, regardless of gender; Patients initially diagnosed with malignant tumors in our hospital from July 2017 to June 2021; Waiver of informed consent.

Exclusion Criteria:

• Patients with benign tumor diagnosed by pathology; The patient refused to participate; Patients judged by other researchers as unsuitable for inclusion in the study.

Patients initially diagnosed with malignancy in Shanghai Renji Hospital from July 2017 to June 2021