PVT1 and cervical squamous cell carcinoma: As shown in Fig. 3a, the area under the curve of serum PVT1 in the diagnosis was 0.9030 with 95% confident interval of 0.8567–0.9472 (p < 0.0001), indicating that serum PVT1 is an accurate biomarker for cervical squamous cell carcinoma.