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Linkage analysis of malignancy-associated sarcoidosis
J M Reich1, J P Mullooly, R E Johnson
1Pulmonary Division, Bess Kaiser Medical Center, Portland, Ore.
Chest
|March 1, 1995
Summary
This study suggests a potential etiological link between sarcoidosis and malignancy in some cases. Further investigation is needed to confirm the association between sarcoidosis and cancer.
Area of Science:
- Pulmonology
- Oncology
- Epidemiology
Background:
- Sarcoidosis is an inflammatory disease that can affect multiple organs.
- A potential association between sarcoidosis and malignancy has been suggested but requires further investigation.
Purpose of the Study:
- To investigate the reported association between sarcoidosis and malignancy.
- To determine if sarcoidosis and malignancy share an etiological relationship.
Main Methods:
- Retrospective analysis of Kaiser Permanente Northwest Region (KPNW) Tumor Registry and sarcoidosis registry data.
- Crossmatching registries over 32 years for malignancy and 24 years for sarcoidosis.
- Utilizing linkage criteria such as late age onset, temporal proximity, and previously reported associated malignancies.
Main Results:
- Eleven cases of concurrent sarcoidosis and malignancy (S&M) were identified.
- 55% of S&M cases met two or more linkage criteria, suggesting a potential relationship.
- Patients with S&M were older at sarcoidosis diagnosis and presented with earlier stages (0 and I) compared to the general sarcoidosis population.
Conclusions:
- Linkage analysis provides evidence for an etiological relationship between sarcoidosis and malignancy in at least 25% of co-occurring cases.
- The study did not find an association between sarcoidosis and Hodgkin's disease.
- Further research is warranted to elucidate the mechanisms underlying the observed association.