Affiliation:
1. Hunan Children’s Hospital, The Pediatric Academy of University of South China
2. Children’s Hospital of Chongqing Medical University
Abstract
Abstract
Background
An expanded spectrum of gain-of-function (GOF) mutations in Ras-related C3 botulinum toxin substrate 2 (RAC2) causes severe combined immunodeficiency (SCID) or combined immunodeficiency (CID), which present with various phenotypes; these immunodeficiencies are characterized by severe lymphopenia, recurrent sinopulmonary infections, bronchiectasis, invasive viral infections, or severe bone marrow hypoplasia. Autoinflammatory features are rarely reported.
Method
We describe the cases of two girls presenting with novel autoinflammatory phenotypes associated with GOF RAC2 variants. An up-to-date review of the literature was conducted to explore the various spectra of clinical manifestations in patients with GOF RAC2 variants.
Results
One patient presented with vasculitis and leg ulcers, whereas the other presented with juvenile idiopathic arthritis and severe uveitis.
Conclusion
Our data extend the spectrum of the clinical presentation of GOF RAC2 variants, which may be associated with autoinflammation, highlighting novel and unusual clinical phenotypes.
Publisher
Research Square Platform LLC