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Multiple primary cancer incidence in Italy
E Crocetti1, E Buiatti, P Falini
1Registro Tumori Toscano, U.O. Epidemiologia Clinica e Descrittiva-CSPO, Via di San Salvi 12, 50135 Florence, Italy. e.crocetti@cspo.it
European Journal of Cancer (Oxford, England : 1990)
|November 27, 2001
Summary
Cancer survivors face a slightly increased risk of developing second primary cancers (MP), particularly within the first two months post-diagnosis. This risk varies by age and cancer type, highlighting the need for targeted follow-up strategies.
Area of Science:
- Epidemiology
- Oncology
- Public Health
Background:
- Cancer survivors are at risk of developing subsequent primary malignancies.
- Understanding the incidence and patterns of second primary cancers (MP) is crucial for improving long-term survival and patient care.
Purpose of the Study:
- To compute the incidence of second independent cancers (MP) in a large Italian cohort of cancer patients.
- To evaluate the risk of MP based on time since first diagnosis, age, gender, and primary cancer site.
Main Methods:
- Utilized data from eleven Italian population-based cancer registries covering over 7.2 million inhabitants.
- Analyzed a cohort of 240,111 cancer patients followed for 544,438 person-years.
- Calculated standardized incidence ratios (SIR) to compare observed versus expected rates of second primary cancers.
Main Results:
- An overall SIR of 1.08 (95% CI: 1.05-1.12) for MP was observed.
- For metachronous cancers, the SIR was 0.93 (95% CI: 0.90-0.96), with higher risks in the first two months post-diagnosis.
- Elevated SIRs for metachronous cancers were noted for oral cavity/pharynx, larynx, connective tissue, non-melanoma skin, ovary, and kidney cancers, especially in patients younger than 65.
Conclusions:
- Cancer patients have a slightly elevated risk of developing second primary cancers, with significant variations by time, age, and cancer site.
- Identification of specific cancer site associations can inform clinical surveillance and management strategies for cancer survivors.