Objective: This retrospective analysis of a real-world database of open radical hysterectomy in Japan aimed to reveal the clinicopathological findings and clinical outcomes of low-risk patients with stage IB-IIA cervical cancer.
Methods: A total of 1143 stage IB1, IB2 and IIA1 (reclassified by FIGO 2018 staging system) patients with cervical cancer who underwent radical hysterectomy between January 2004 and December 2008 from the Japanese Gynecologic Oncology Group database were analyzed. Low-risk patients were defined as those without a tumor size exceeding 4 cm, parametrial tumor involvement, deep (outer half) stromal invasion, lymphovascular space invasion or lymph nodal metastasis.
Results: 61.2% (772/1262) patients with stage IB1, 32.1% (229/932) with stage IB2 and 16.9% (72/294) of stage IIA1 were classified into the low-risk group. The 5-year overall survival and disease-free survival rates were 98.4 and 93.7%, respectively. Histological classification did not affect the survival rates, but stage IIA cases had significantly lower overall survival and disease-free survival (83.5 and 93.8%, respectively) than stage IB cases. The independent prognostic factors for disease-free survival were older age (≧50), histology, clinical stage and clinical stage as independent prognostic factors for overall survival. Regarding recurrence, older age, non-SCC and stage IIA1 were independent risk factors for local recurrence, but stage IIA1 was the only independent risk factor for distant metastasis.
Conclusion: We found that stage IIA1 was the strongest risk factor for survival and recurrence of low-risk uterine cervical cancer (FIGO, 2018). In low-risk cases, stage IIA1 should be considered separately from stage IB.
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