The Ohio Cancer Incidence Surveillance System (OCISS) at the Ohio Department of Health collects and analyzes cancer incidence data on all Ohio residents. Cancer incidence is defined as newly-diagnosed cases of cancer. All Ohio providers of medical care are required, by law, to report to OCISS all cancers diagnosed and/or treated in Ohio. A reportable case is defined as any primary malignant neoplasm, with the exception of basal and squamous cell carcinoma of the skin and carcinoma in situ of the cervix. Benign and borderline intracranial and central nervous system tumors are also reportable. The collection and analysis of population-based cancer incidence data help determine the burden of cancer in Ohio's communities, raise awareness about factors that may increase cancer risk and the benefits of early detection, and improve the survival of persons diagnosed with cancer.
OCISS data are collected according to national data standards as set forth by the North American Association of Central Cancer Registries (NAACCR). The NAACCR Data Standards & Data Dictionary is available here: naaccr.org. Please change the selection to "Version 18" to match our current file layout.
A Glossary and Technical Notes document on cancer data is also available.