Enlonstobart with chemotherapy and radiotherapy for locally advanced cervical cancer

Inclusion Criteria:

* Ages 18-75;
* Cervical squamous cell carcinoma, adenocarcinoma, or adenosquamous carcinoma confirmed by histology or cytopathology;
* Patients with locally advanced cervical cancer who have not previously received any treatment and are classified as FIGO stage III-IV A as of 2018;
* ECOG performance status 0-1;
* Left ventricular ejection fraction (LVEF) ≥ 50%;
* Bone marrow function: absolute neutrophil count (ANC) ≥ 1.5 × 10⁹/L, hemoglobin ≥ 90 g/dL, platelets (PLT) ≥ 100 × 10⁹/L;
* Liver function: Alanine aminotransferase (ALT), aspartate aminotransferase (AST), and alkaline phosphatase (ALP) ≤ 2.5 times the upper limit of normal (ULN); if liver metastases are present, ≤ 5×ULN; total bilirubin ≤ 1.5×ULN (this limit may be relaxed to 3×ULN for subjects with Gilbert's syndrome);
* Renal function: Serum creatinine (Cr) ≤ 1.5×ULN; if \> 1.5×ULN, creatinine clearance must be ≥ 60 mL/min (calculated using the Cockcroft-Gault formula);
* Coagulation: Prothrombin time (PT), activated partial thromboplastin time (APTT), and international normalized ratio (INR) ≤ 1.5×ULN;
* According to the RECIST 1.1 criteria, the patient must have at least one evaluable lesion;
* Patients of childbearing potential must have a negative pregnancy test result and voluntarily use effective and reliable contraception during the study;
* Voluntarily participate in the study and sign an informed consent form.

Exclusion Criteria:

* A history of active malignant tumors within 3 years prior to the first dose, excluding cervical cancer, which is the subject of this trial, and any locally curable tumors that have already undergone curative treatment (e.g., resected basal cell or squamous cell skin cancer, superficial bladder cancer, or cured carcinoma in situ, such as ductal carcinoma in situ of the breast);
* Patients with active tuberculosis or a history of tuberculosis;
* Patients with a history of interstitial lung disease or non-infectious pneumonia requiring glucocorticoid therapy;
* Patients with hypertension that is not adequately controlled with antihypertensive medication (defined as systolic blood pressure \> 150 mmHg or diastolic blood pressure \> 90 mmHg), or a history of hypertensive crisis or hypertensive encephalopathy;
* Those who have experienced a serious cardiovascular event within 6 months prior to randomization, including but not limited to: stable angina classified as NYHA Class III-IV; unstable angina or myocardial infarction; NYHA Class III-IV congestive heart failure; severe arrhythmias requiring medication (asymptomatic atrial fibrillation is permitted if the ventricular rate can be controlled); Severe arterial or venous thromboembolic events (e.g., intracerebral hemorrhage, cerebral infarction, deep vein thrombosis, and pulmonary embolism);
* Patients with active autoimmune diseases, or a history of autoimmune diseases within the 2 years prior to randomization, who still require systemic treatment. However, subjects with the following conditions may be considered for further screening: well-controlled type 1 diabetes; hypothyroidism requiring only hormone replacement therapy and well-controlled; skin diseases not requiring systemic treatment (such as vitiligo, psoriasis, or alopecia); or subjects whose condition is not expected to recur in the absence of external triggers.
* Individuals with a known history of human immunodeficiency virus (HIV) infection or acquired immunodeficiency syndrome (AIDS);
* Subjects with uncontrolled pleural, pericardial, or abdominal/pelvic effusions requiring repeated drainage;
* Subjects who have received immunosuppressive drugs or systemic corticosteroids for the purpose of immunosuppression (prednisone \>10 mg/day or other equivalent medications) within 2 weeks prior to receiving the study drug;
* Subjects who have undergone major surgery (craniotomy, thoracotomy, or laparotomy) within 28 days prior to the first administration of the study drug, or who still have unhealed wounds, ulcers, or fractures at the time of screening;
* Subjects with a history of allogeneic hematopoietic stem cell transplantation or organ transplantation;
* Subjects with other conditions deemed by the investigator to be incompatible with participation in this trial.