The accession number consists of how many parts?

The accession number consists of two parts: the year of accession and a unique sequential number assigned to each case. The purpose of the accession number is to provide a systematic way to track and catalog instances of cancer reported to a registry. The year indicates when the case was recorded, while the sequential number helps ensure that each case has a unique identifier within that year. This structure allows for efficient data management and retrieval within cancer registries, ensuring that each case can be clearly identified and referenced. Understanding the composition of the accession number is vital for anyone working in cancer registration, as it is essential for accurate data collection and record-keeping.