Colposcopic Scoring Systems in the Detection of Cervical Intraepithelial Neoplasia: A Review of Current Evidence

Abstract

Colposcopy is a key diagnostic modality in the evaluation of abnormal cervical screening tests and plays a central role in detecting cervical intraepithelial neoplasia (CIN). However, its subjective nature results in variability in interpretation and diagnostic accuracy. To address these limitations, several colposcopic scoring systems have been developed to standardize assessment and improve reproducibility. This review evaluates the evolution, components, and diagnostic performance of commonly used colposcopic scoring systems, including the Reid Colposcopic Index (RCI), Swede Score, and modified systems, in detecting cervical intraepithelial neoplasia. A narrative review of published literature was conducted, focusing on studies evaluating colposcopic scoring systems, their correlation with histopathology, and clinical applicability. The Reid Colposcopic Index provides a structured and widely used approach but is limited by the absence of lesion size as a parameter. The Swede Score incorporates lesion size and demonstrates improved sensitivity and specificity for high-grade lesions. Modified scoring systems and standardized terminology, including the International Federation of Cervical Pathology and Colposcopy (IFCPC) classification, further enhance diagnostic consistency. Higher Swede Scores correlate strongly with CIN2+ lesions and may support “see-and-treat” strategies in selected patients. Colposcopic scoring systems improve standardization and diagnostic accuracy. While both the Reid Colposcopic Index and Swede Score correlate well with histopathology, the Swede Score offers greater clinical utility. Operator expertise and adherence to standardized protocols remain essential.