42030-7

LOINC code 42030-7 identifies "Multiple tumors reported as single primary Cancer". This data item is used to identify cases with multiple tumors that are abstracted and reported as a single primary using the SEER, IARC, or Canadian Cancer Registry multiple primary rules. Multiple tumors may individually exhibit in situ, invasive, or any combination of in situ and invasive behaviors. Multiple intracranial and central nervous system tumors may individually exhibit benign, borderline, malignant, or any combination of these behaviors. Multiple tumors found in the same organ or in a single primary site may occur at the time of initial diagnosis or within one year of the initial diagnosis. The data item does not apply to metastatic tumors. Data will be collected at the time of initial case abstract or within one year of the initial diagnosis. This data item is also used when a physician states that there are two or more primaries, but for surveillance purposes, the case is reported as a single primary. Patients with multiple tumors that are currently reported as a single primary for surveillance purposes may have a worse prognosis or more extensive treatment than patients with a single tumor. This data item will make it possible to identify important information about these cases for data analysis. Data collected under this item will be used to assess the number, type, and anatomic location of multiple tumors currently abstracted as a single primary using the SEER, IARC, or Canadian Cancer Registry rules for determining multiple primary cancers and the impact of these cases on cancer case counts and incidence rates. Data will also serve as a basis for measuring the impact and feasibility of future modifications to the multiple primary rules. This data item will make it possible to compare individually reported cancer cases with historical data if the rules are changed. .. NAACCR Data Standards and Data Dictionary Version 11

This code measures Multiple tumors reported as single primary in Cancer.XXX. It belongs to the TUMRRGT class in the LOINC classification.

LOINC (Logical Observation Identifiers Names and Codes) is a universal standard for identifying laboratory and clinical observations. It is maintained by the Regenstrief Institute and used worldwide for health data exchange.