Prospective, multicenter, non-interventional registration studies were used in this project . Eight hundreds patients with solid tumors who met the inclusion criteria in six hospitals in Sichuan Province, Sichuan Province, were selected from the first chemotherapy cycle using PEG-rhG-CSF (can be any chemotherapy cycle of the patient), and each subsequent chemotherapy cycle was recorded. The use of PEG-rhG-CSF and related patient outcomes until the end of chemotherapy. Analyze the clinical practice of using PEG-rhG-CSF in the real world.

Inclusion Criteria:

1. Age ≥ 18 years old;
2. Diagnosed as a malignant solid tumor by histology and cytology, requiring chemotherapy patients;
3. The first use of PEG-rhG-CSF during the chemotherapy cycle (not limited to the first chemotherapy cycle, can be any chemotherapy cycle of the patient);
4. Subjects volunteered to participate in this clinical trial and signed informed consent.

Exclusion Criteria:

1. PEG-rhG-CSF was used in the current chemotherapy cycle;
2. Have received hematopoietic stem cell transplantation or bone marrow transplantation;
3. Other drug clinical trials are currently underway.

1. Age ≥ 18 years old;
2. Diagnosed as a malignant solid tumor by histology and cytology, requiring chemotherapy patients;
3. The first use of PEG-rhG-CSF during the chemotherapy cycle (not limited to the first chemotherapy cycle, can be any chemotherapy cycle of the patient);
4. Subjects volunteered to participate in this clinical trial and signed informed consent.