Incidence, clinical features, and survival outcomes of primary malignant conjunctival tumor: a US population-based retrospective cohort analysis based on the SEER database (1975-2018)

CONCLUSIONS: PMCT incidence increased after 1975 and decreased after 1997. Age, histological type, SEER stage, and surgery were all significantly associated with DSS and OS. Age ≥75 years, melanoma, and distant SEER stage were associated with worse DSS, while age ≥75 years, male, unmarried status, distant SEER stage were related to worse OS and lymphoma was related to better OS. Surgery may improve the prognosis of patient with PMCT.