Clinicopathological Profile, Stage Distribution, and Treatment Patterns of Oral Cancer at a National Referral Center in Indonesia

Background: Late-stage presentation of oral cancer remains a major challenge in low- and middle-income countries and contributes substantially to poor clinical outcomes. Data describing oral cancer presentation patterns in Indonesia remain limited. This study aimed to characterize the clinicopathological profile, stage distribution, treatment patterns, and exposure-related characteristics of oral cancer patients treated at a national referral center in Indonesia. Methods: A retrospective study was conducted using medical records of 404 patients with histopathologically confirmed oral malignancies treated between 2021 and 2025. Descriptive analyses were performed to summarize demographic, clinicopathological, staging, treatment-related, and exposure-related characteristics. Results: The mean age at diagnosis was 49.17 ± 14.11 years, with a relatively balanced sex distribution. The tongue was the most common primary tumor site (76.0%), and oral squamous cell carcinoma (OSCC) represented the predominant histopathological diagnosis (81.9%). Late-stage presentation (stage III–IV) was observed in 64.1% of all cases and increased to 70.7% among patients with available staging information, while 29.2% of patients had incomplete or undefined staging data. Surgical treatment, either alone or combined with adjuvant therapies, was the most frequently employed treatment modality. Notably, 21.5% of patients had no documented definitive oncologic treatment during the recorded treatment period. Smoking was reported by 35.4% of patients, alcohol consumption by 4.0%, and a family history of cancer by 24.8%. Conclusions: Advanced-stage oral cancer was highly prevalent in this referral-based cohort. The substantial burden of late-stage disease, together with incomplete staging information and the proportion of patients without documented definitive treatment, highlights challenges related to staging completeness, treatment documentation, and cancer care monitoring. These findings support efforts to strengthen early detection, referral coordination, and cancer care monitoring within the Indonesian healthcare system.