兩癌篩查系統作為公共衛生服務體系的重要組成部分，其歷史信息保留時長需兼顧醫療數據可追溯性、患者隱私保護及存儲資源優化等多重需求。當前，我國尚未出臺針對兩癌篩查數據的統一保留期限標準，但可依據醫療衛生行業通用規范及地方實踐進行綜合判斷。

　　As an important component of the public health service system, the two cancer screening systems need to consider multiple requirements such as medical data traceability, patient privacy protection, and storage resource optimization for the duration of historical information retention. At present, China has not yet established a unified retention period standard for two cancer screening data, but comprehensive judgments can be made based on the general norms of the medical and health industry and local practices.

　　政策法規框架是數據保留的核心依據。根據《醫療機構管理條例》及《電子病歷應用管理規范（試行）》，醫療健康數據的保存年限不得低于15年，對于涉及公共衛生監測的篩查數據，部分地區要求延長至30年。例如，山東省衛健委發布的《婦女兩癌檢查項目實施方案》明確規定，篩查結果需與居民健康檔案系統對接，實現長期動態管理。

　　The policy and regulatory framework is the core basis for data retention. According to the Regulations on the Administration of Medical Institutions and the Management Standards for Electronic Medical Record Applications (Trial), the retention period of medical and health data shall not be less than 15 years. For screening data related to public health monitoring, some regions require an extension to 30 years. For example, the Implementation Plan for Women's Two Cancer Screening Projects issued by the Shandong Provincial Health Commission clearly stipulates that screening results need to be integrated with the resident health record system to achieve long-term dynamic management.

　　技術實現方式影響數據存儲周期。采用關系型數據庫管理的篩查系統，歷史數據通常通過分區存儲或歸檔機制實現分級管理。以宮頸癌篩查為例，HPV檢測結果、細胞學涂片影像等結構化數據可壓縮存儲，非活躍數據遷移至低成本存儲介質，但邏輯上仍保持可訪問狀態。部分區域平臺采用區塊鏈技術，確保篩查記錄不可篡改且可追溯，理論上可實現永久保存。

　　The implementation of technology affects the data storage cycle. The screening system using relational database management typically achieves hierarchical management of historical data through partition storage or archiving mechanisms. Taking cervical cancer screening as an example, structured data such as HPV test results and cytology smear images can be compressed and stored, while inactive data can be migrated to low-cost storage media, but logically remain accessible. Some regional platforms adopt blockchain technology to ensure that screening records are tamper proof and traceable, theoretically achieving permanent preservation.

　　隱私保護與倫理要求是數據保留的約束條件。依據《個人信息保護法》，篩查數據在達到保留期限后需進行匿名化處理或徹底銷毀。實際操作中，系統會通過脫敏技術去除姓名、身份證號等直接標識符，僅保留年齡、篩查結果等必要信息用于統計分析。對于HIV陽性等敏感關聯數據，部分地區實行專項加密管理，訪問權限嚴格限定于授權醫務人員。

　　Privacy protection and ethical requirements are constraints on data retention. According to the Personal Information Protection Law, screening data must be anonymized or completely destroyed after reaching the retention period. In actual operation, the system will remove direct identifiers such as name and ID number through desensitization technology, and only retain necessary information such as age and screening results for statistical analysis. For sensitive associated data such as HIV positivity, some regions implement special encryption management, and access permissions are strictly limited to authorized medical personnel.

　　區域實踐差異體現管理精細化趨勢。經濟發達地區如長三角、珠三角，依托政務云平臺實現篩查數據集中存儲，保留周期普遍設定為20-25年，以支撐長期流行病學研究。而中西部地區受限于基礎設施，多采用分級存儲策略，活躍數據保留5年，歷史數據轉移至光盤庫或磁帶庫，保留期限不低于15年。

　　Regional practice differences reflect the trend of refined management. Economically developed regions such as the Yangtze River Delta and Pearl River Delta rely on government cloud platforms to achieve centralized storage of screening data, with a retention period generally set at 20-25 years to support long-term epidemiological research. However, the central and western regions are limited by infrastructure and often adopt a tiered storage strategy. Active data is retained for 5 years, while historical data is transferred to CD or tape libraries with a retention period of no less than 15 years.

　　系統升級與數據遷移是延長保留周期的關鍵挑戰。隨著篩查技術迭代，如從巴氏涂片轉向HPV基因分型檢測，舊系統數據需與新平臺兼容。部分省級平臺采用HL7 FHIR標準構建互操作接口，確保歷史數據在系統升級后仍可查詢。

　　System upgrades and data migration are key challenges in extending retention periods. With the iteration of screening technology, such as shifting from Pap smear to HPV genotyping testing, the old system data needs to be compatible with the new platform. Some provincial platforms adopt the HL7 FHIR standard to build interoperability interfaces, ensuring that historical data can still be queried after system upgrades.

　　兩癌篩查系統歷史信息的保留時長需在法律合規、技術可行與倫理風險間尋求平衡。當前實踐以15-30年為主流，未來隨著數據生命周期管理技術的成熟，保留策略將向動態化、智能化方向發展，在保障公共衛生研究需求的同時，最大限度降低個人隱私泄露風險。

　　The retention period of historical information in two cancer screening systems needs to seek a balance between legal compliance, technical feasibility, and ethical risks. The current practice is dominated by 15-30 years. In the future, with the maturity of data lifecycle management technology, retention strategies will develop towards dynamic and intelligent directions, while ensuring the needs of public health research and minimizing the risk of personal privacy leakage.

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