In which sequence number would a malignant lung tumor and a benign meningioma be recorded?

The recording of tumors in sequence numbers follows specific guidelines related to the behavior and primary site of the tumors, among other factors. In this case, malignant and benign tumors are differentiated in how their sequence numbers are assigned.

For a malignant lung tumor, which is a primary malignancy, it is designated with a sequence number of 00, indicating it is the first registered primary tumor. This numbering begins with 00 for the first primary, as per standard tumor classification practices.

On the other hand, the benign meningioma is typically assigned a sequence number that reflects its follow-up position in relation to the already registered malignant tumor. In many cases, benign tumors will receive a sequence number that is higher and not a continuation of the initial numbers assigned to malignant tumors, often starting with 60, indicating it is a secondary tumor not classified as malignant.

Thus, the sequence of 00 for the malignant lung tumor and 60 for the benign meningioma accurately reflects the primary versus secondary tumor classification, aligning with established rules for documenting tumors in registries. This approach ensures clarity and maintains compliance with clinical classification standards.