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- Presentation
Granulomas Gone Wild: Update of Rubella as an Evolving Trigger
Description
The presentation "Granulomas Gone Wild: Update of Rubella as an Evolving Trigger" discusses the emerging role of rubella virus in the formation of granulomas, especially in patients with immune system deficiencies. The speaker highlights findings from a study initiated by the LAP Huster Institute in 2014, which found rubella vaccine strains in granulomas of patients with inborn immunodeficiencies. This prompted further investigation, revealing that granulomas could also contain wild-type rubella virus, particularly in adults. Additionally, the presentation explores the characteristics of rubella, a mild RNA virus that can evade the immune system and cause complications such as congenital rubella syndrome. Despite the successful rubella vaccination program eliminating congenital cases in the U.S., a new trend was observed: cases of granulomas linked to both vaccine-derived and wild-type rubella virus have emerged. The findings indicated that biopsy specimens from several adult patients contained the rubella virus, with a notable occurrence of granulomas appearing years post-vaccination or exposure. The presentation urges healthcare professionals to consider rubella as a potential cause of granulomas in both immunocompromised and healthy adults, sharing treatment strategies that have shown effectiveness, including intralesional corticosteroids and immunosuppressives. Overall, the speaker encourages further investigation into this phenomenon as ongoing studies aim to unravel the underlying mechanisms driving this unusual association.
View moreConclusions
- Granulomas associated with rubella virus have been identified in both pediatric and adult patients, indicating a wider impact of the virus beyond typical presentations.
- The rubella vaccine (RA27/3) strain has been detected within granulomas, suggesting a possible link to vaccine-derived infections in individuals with inborn errors of immunity.
- Patients with granulomatous dermatitis may have either wild type or vaccine-derived rubella virus, with a significant occurrence in immunocompetent adults as well.
- The majority of patients with rubella-associated granulomas present with significant immune system abnormalities, yet cases have also been found in immunocompetent adults.
- Treatment for rubella-associated granulomas is challenging, with mixed results from various therapies including steroids, antivirals, and immunomodulators.
- A substantial number of granulomas in this study cohort were rubella positive, indicating that rubella virus may be a more common trigger for granulomas than previously recognized.
- Ongoing research is focused on understanding the mechanisms of rubella viral persistence in granulomas and the immune response involved.
- The findings highlight that rubella may not induce sterilizing immunity, allowing the virus to persist in immune-privileged sites such as granulomas.
- Clinical Microbiology and Infection 2014;20(10):0656-0663.
- Perelygina et al., Curr Opin Allergy Clin Immunol 2020, 20:574-581
- Perelygina et al., Front Immunol 2021 Dec 20;12:796065.
- JAMA Dermatol. 2021;157(7):842-847. doi:10.1001/jamadermatol.2021.1577
- JAMA Dermatol. 2022;158(6):626-633.
- Front Immunol. 2021 Dec 20;12:796065.
- PNAS Nexus. 2023 Aug 3;2(9):pgad256