Cancer in connective tissue disease

Area of Science:

• Immunology
• Oncology
• Rheumatology

Background:

• The link between cancer and autoimmunity is established, with increased cancer incidence in autoimmune disease patients.
• Mechanisms are complex: cancer may trigger autoimmunity, or chronic inflammation from autoimmunity may promote cancer.
• Immunosuppressive therapies for autoimmune conditions may increase cancer risk, though data in rheumatology is inconclusive.

Purpose of the Study:

• To explore the intricate relationship between cancer and autoimmune diseases.
• To investigate the bidirectional influence between oncogenesis and autoimmune responses.
• To highlight the role of connective tissue diseases in understanding this interplay.

Main Methods:

• Review of existing literature on cancer incidence in systemic autoimmune diseases.
• Analysis of proposed mechanisms linking autoimmunity and oncogenesis.
• Examination of data regarding immunosuppressive therapies and cancer risk in rheumatology.

Main Results:

• Autoimmune syndromes can emerge post-cancer diagnosis, suggesting tumor antigens may initiate autoimmune responses.
• Chronic immune activation in autoimmunity may promote oncogenesis via inflammation.
• Connective tissue diseases show variable cancer risk associations at disease onset and long-term.

Conclusions:

• The interplay between cancer and autoimmunity is multifaceted, involving immune tolerance breakdown and pro-inflammatory environments.
• Further research is needed to fully elucidate these mechanisms and address remaining unmet needs.
• Connective tissue diseases serve as a key model for studying cancer-autoimmunity interactions.