Inheritance of NSAID-Exacerbated Respiratory Disease.

Nonsteroidal anti-inflammatory drug (NSAID)-exacerbated respiratory disease (N-ERD) has been considered an acquired condition. Positive first-degree family history has been reported in 1% of cases. The geographic and genetic isolation of the Finnish population offers exceptional opportunities for inheritance studies. In this questionnaire study, we explored the familial aggregation of N-ERD in 66 Finnish families of patients with N-ERD. The majority of patients (67%) had a positive family history of NSAID intolerance, asthma, nasal polyposis, or N-ERD. Furthermore, 55% had a positive first-degree family history of asthma, 21% nasal polyposis, 20% NSAID intolerance, and 11% N-ERD. The prevalence of asthma, nasal polyposis, NSAID intolerance, and N-ERD among first-degree relatives was 13%, 5%, 4%, and 2%, respectively. We present the pedigrees of the 44 affected families. According to our findings, Finnish patients with N-ERD seem to have a genetic susceptibility to it.