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CASE BASED REVIEW
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Autoinflammation with arthritis and dyskeratosis an inflammasomopathy: Case report and review of literature


1 Department of Clinical Immunology and Rheumatology, Nizam's Institute of Medical Sciences; Department of Rheumatology and Clinical Immunology, Star Hospitals, Hyderabad, Telangana, India
2 Department of Clinical Immunology and Rheumatology, Nizam's Institute of Medical Sciences, Hyderabad, Telangana, India

Correspondence Address:
Liza Rajasekhar,
Department of Clinical Immunology and Rheumatology, Nizam's Institute of Medical Sciences, Hyderabad, Telangana
India
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/injr.injr_17_21

Inherited disorders of the inflammasome pathway causes dysregulated inflammasome activation, which presents with inflammation and other clinical features linked to the defective protein. Eight mutations have been previously described in the NLRP1 inflammasome protein, causing different inflammatory skin disorders. Two of these mutations are associated with “autoinflammation with arthritis and dyskeratosis (AIADK),” a novel Mendelian auto-inflammatory disorder, in the 2017 International Union of Immunological Societies phenotypic classification for primary immunodeficiencies. We report a 22-year-old female, with recurrent generalized urticaria, periodic fever and pain abdomen, inflammatory polyarthritis, cutaneous lesions over the extremities, and persistently elevated inflammatory markers. On next-generation sequencing, a heterozygous missense mutation in exon 4 of the NLRP1 gene (chr17:G.5461839C>T) was detected, which results in the amino acid substitution of glutamine for arginine at codon 726 (c.2177G>A; p.Arg726Gln). A probable diagnosis of AIADK, possibly caused by this mutation was proposed, and patient responded well to colchicine.


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