To explore the early intervention timing of recombinant human thrombopoietin (rhTPO) for cancer treatment-induced thrombocytopenia (CTIT) in cervical squamous cell carcinoma (CSCC) patients during concurrent chemoradiotherapy.

Inclusion Criteria:

1. KPS(Karnofsky Performance Status) >60 points;
2. histopathologically or cytologically confirmed stage I-IVa CSCC (FIGO 2018); 3.18-70 years; receiving radical CCRT;

4.receiving rhTPO treatment when they occurred G1 or G2 CTIT at first presentation during CCRT; 5.expected survival time ≥6 months

Exclusion Criteria:

1. patients with haematopoietic system diseases, including lymphoma, leukaemia, aplastic anaemia, primary immune thrombocytopenia, myeloproliferative diseases, multiple myeloma, and myelodysplastic syndromes;
2. patients who had experienced non-CTIT within 6 months before screening, including but not limited to EDTA(Ethylenediaminetetraacetic acid)-dependent pseudothrombocytopenia, hypersplenism, infection, bleeding, etc.;
3. patients who had severe visceral bleeding or intracranial haemorrhage before enrolment; any arterial or venous thrombosis within 6 months before screening;
4. patients with severe cardiovascular diseases or arrhythmias that increase the risk of thrombus formation, coronary stent placement, angioplasty, and coronary artery bypass grafts within the prior 6 months;
5. patients who had received platelet-producing drugs such as recombinant human interleukin 11(rhIL-11) within 1 week before the administration of the study drug;
6. haemoglobin <50g/L after red blood cell transfusion or erythropoietin treatment or absolute neutrophil count <1.0×109/L after granulocyte colony-stimulating factor treatment;
7. patients participating in clinical trials or who participated in an investigational drug trial within 4 weeks and received study treatment or investigational devices;
8. and patients who were considered by the investigator to be inappropriate for inclusion for other reasons.