La Bella, Saverio, Loconte, Roberta, Attanasi, Marina, Muselli, Mario, Di Donato, Giulia, Di Ludovico, Armando, Natale, Marco, Mastrorilli, Violetta, Giugno, Andrea, Papa, Santi, Ferrante, Rossella, Buccolini, Carlotta, Antonucci, Ivana, Chiarelli, Francesco, Necozione, Stefano, Barone, Patrizia, La Torre, Francesco, and Breda, Luciana
Introduction: Although familial Mediterranean fever (FMF) is a relevant disease in countries surrounding the Mediterranean Sea, there are still few reports from Italy.We retrospectively evaluated patients with FMF diagnosed according to the EuroFever/PRINTO classification criteria in three pediatric rheumatology referral centers in central-southern Italy. Logistic regression analysis assessed the associations between age at disease onset and symptoms.Overall, 48 patients were enrolled (28 females, 20 males), with a median age at onset of 3.3 [3.1] years, and a median follow-up period of 5.1 [10.8] years. The most common MEFV genotype was M694V/- (11 patients, 22.9%), followed by M694V/M694V (6 patients, 12.5%). At onset, recurrent fever was observed in 47 patients (97.9%), with a median time between attacks of 18 [11] days. Overall, recurrent fever was observed in all patients, abdominal pain in 44 (91.7%), and chest pain in 18 (37.5%). At the last follow-up visit, 24 patients were on colchicine (50%), 2 on biologic (4.2%), and 6 on both (12.5%). Canakinumab was the most used biologic drug, in 6 (12.5%) patients. MEFV genotype was associated with disease severity (p = 0.007) and the use of a biological drug (p = 0.01). FMF prevalence in the Abruzzo region was found highly than expected (at least 1:45,000). Differently, we found a relevant gap among FMF patients expected and observed in the Apulia and Sicily regions.FMF is a relevant issue in central-southern Italy. A large epidemiologic study should be performed to better define its prevalence in the country.Key Points• Italian children with familial Mediterranean fever tend to have an early age of onset, primarily manifesting with recurrent fever and characteristic associated symptoms.• Many MEFV gene variants are present in Italian children with familial Mediterranean fever, and these patients are most often heterozygous, exhibiting a mild to moderate phenotype.• The prevalence of familial Mediterranean fever in Italy is still unknown but recently estimated to be around 1:60,000, probably higher in central and southern Italy.• According to our cohort, the prevalence of FMF in the Abruzzo region is at least 1:45,000, higher than expected. Differently, we found lower prevalence rates of the disease in Apulia and Sicily.Key Points• Italian children with familial Mediterranean fever tend to have an early age of onset, primarily manifesting with recurrent fever and characteristic associated symptoms.• Many MEFV gene variants are present in Italian children with familial Mediterranean fever, and these patients are most often heterozygous, exhibiting a mild to moderate phenotype.• The prevalence of familial Mediterranean fever in Italy is still unknown but recently estimated to be around 1:60,000, probably higher in central and southern Italy.• According to our cohort, the prevalence of FMF in the Abruzzo region is at least 1:45,000, higher than expected. Differently, we found lower prevalence rates of the disease in Apulia and Sicily.Methods: Although familial Mediterranean fever (FMF) is a relevant disease in countries surrounding the Mediterranean Sea, there are still few reports from Italy.We retrospectively evaluated patients with FMF diagnosed according to the EuroFever/PRINTO classification criteria in three pediatric rheumatology referral centers in central-southern Italy. Logistic regression analysis assessed the associations between age at disease onset and symptoms.Overall, 48 patients were enrolled (28 females, 20 males), with a median age at onset of 3.3 [3.1] years, and a median follow-up period of 5.1 [10.8] years. The most common MEFV genotype was M694V/- (11 patients, 22.9%), followed by M694V/M694V (6 patients, 12.5%). At onset, recurrent fever was observed in 47 patients (97.9%), with a median time between attacks of 18 [11] days. Overall, recurrent fever was observed in all patients, abdominal pain in 44 (91.7%), and chest pain in 18 (37.5%). At the last follow-up visit, 24 patients were on colchicine (50%), 2 on biologic (4.2%), and 6 on both (12.5%). Canakinumab was the most used biologic drug, in 6 (12.5%) patients. MEFV genotype was associated with disease severity (p = 0.007) and the use of a biological drug (p = 0.01). FMF prevalence in the Abruzzo region was found highly than expected (at least 1:45,000). Differently, we found a relevant gap among FMF patients expected and observed in the Apulia and Sicily regions.FMF is a relevant issue in central-southern Italy. A large epidemiologic study should be performed to better define its prevalence in the country.Key Points• Italian children with familial Mediterranean fever tend to have an early age of onset, primarily manifesting with recurrent fever and characteristic associated symptoms.• Many MEFV gene variants are present in Italian children with familial Mediterranean fever, and these patients are most often heterozygous, exhibiting a mild to moderate phenotype.• The prevalence of familial Mediterranean fever in Italy is still unknown but recently estimated to be around 1:60,000, probably higher in central and southern Italy.• According to our cohort, the prevalence of FMF in the Abruzzo region is at least 1:45,000, higher than expected. Differently, we found lower prevalence rates of the disease in Apulia and Sicily.Key Points• Italian children with familial Mediterranean fever tend to have an early age of onset, primarily manifesting with recurrent fever and characteristic associated symptoms.• Many MEFV gene variants are present in Italian children with familial Mediterranean fever, and these patients are most often heterozygous, exhibiting a mild to moderate phenotype.• The prevalence of familial Mediterranean fever in Italy is still unknown but recently estimated to be around 1:60,000, probably higher in central and southern Italy.• According to our cohort, the prevalence of FMF in the Abruzzo region is at least 1:45,000, higher than expected. Differently, we found lower prevalence rates of the disease in Apulia and Sicily.Results: Although familial Mediterranean fever (FMF) is a relevant disease in countries surrounding the Mediterranean Sea, there are still few reports from Italy.We retrospectively evaluated patients with FMF diagnosed according to the EuroFever/PRINTO classification criteria in three pediatric rheumatology referral centers in central-southern Italy. Logistic regression analysis assessed the associations between age at disease onset and symptoms.Overall, 48 patients were enrolled (28 females, 20 males), with a median age at onset of 3.3 [3.1] years, and a median follow-up period of 5.1 [10.8] years. The most common MEFV genotype was M694V/- (11 patients, 22.9%), followed by M694V/M694V (6 patients, 12.5%). At onset, recurrent fever was observed in 47 patients (97.9%), with a median time between attacks of 18 [11] days. Overall, recurrent fever was observed in all patients, abdominal pain in 44 (91.7%), and chest pain in 18 (37.5%). At the last follow-up visit, 24 patients were on colchicine (50%), 2 on biologic (4.2%), and 6 on both (12.5%). Canakinumab was the most used biologic drug, in 6 (12.5%) patients. MEFV genotype was associated with disease severity (p = 0.007) and the use of a biological drug (p = 0.01). FMF prevalence in the Abruzzo region was found highly than expected (at least 1:45,000). Differently, we found a relevant gap among FMF patients expected and observed in the Apulia and Sicily regions.FMF is a relevant issue in central-southern Italy. A large epidemiologic study should be performed to better define its prevalence in the country.Key Points• Italian children with familial Mediterranean fever tend to have an early age of onset, primarily manifesting with recurrent fever and characteristic associated symptoms.• Many MEFV gene variants are present in Italian children with familial Mediterranean fever, and these patients are most often heterozygous, exhibiting a mild to moderate phenotype.• The prevalence of familial Mediterranean fever in Italy is still unknown but recently estimated to be around 1:60,000, probably higher in central and southern Italy.• According to our cohort, the prevalence of FMF in the Abruzzo region is at least 1:45,000, higher than expected. Differently, we found lower prevalence rates of the disease in Apulia and Sicily.Key Points• Italian children with familial Mediterranean fever tend to have an early age of onset, primarily manifesting with recurrent fever and characteristic associated symptoms.• Many MEFV gene variants are present in Italian children with familial Mediterranean fever, and these patients are most often heterozygous, exhibiting a mild to moderate phenotype.• The prevalence of familial Mediterranean fever in Italy is still unknown but recently estimated to be around 1:60,000, probably higher in central and southern Italy.• According to our cohort, the prevalence of FMF in the Abruzzo region is at least 1:45,000, higher than expected. Differently, we found lower prevalence rates of the disease in Apulia and Sicily.Conclusions: Although familial Mediterranean fever (FMF) is a relevant disease in countries surrounding the Mediterranean Sea, there are still few reports from Italy.We retrospectively evaluated patients with FMF diagnosed according to the EuroFever/PRINTO classification criteria in three pediatric rheumatology referral centers in central-southern Italy. Logistic regression analysis assessed the associations between age at disease onset and symptoms.Overall, 48 patients were enrolled (28 females, 20 males), with a median age at onset of 3.3 [3.1] years, and a median follow-up period of 5.1 [10.8] years. The most common MEFV genotype was M694V/- (11 patients, 22.9%), followed by M694V/M694V (6 patients, 12.5%). At onset, recurrent fever was observed in 47 patients (97.9%), with a median time between attacks of 18 [11] days. Overall, recurrent fever was observed in all patients, abdominal pain in 44 (91.7%), and chest pain in 18 (37.5%). At the last follow-up visit, 24 patients were on colchicine (50%), 2 on biologic (4.2%), and 6 on both (12.5%). Canakinumab was the most used biologic drug, in 6 (12.5%) patients. MEFV genotype was associated with disease severity (p = 0.007) and the use of a biological drug (p = 0.01). FMF prevalence in the Abruzzo region was found highly than expected (at least 1:45,000). Differently, we found a relevant gap among FMF patients expected and observed in the Apulia and Sicily regions.FMF is a relevant issue in central-southern Italy. A large epidemiologic study should be performed to better define its prevalence in the country.Key Points• Italian children with familial Mediterranean fever tend to have an early age of onset, primarily manifesting with recurrent fever and characteristic associated symptoms.• Many MEFV gene variants are present in Italian children with familial Mediterranean fever, and these patients are most often heterozygous, exhibiting a mild to moderate phenotype.• The prevalence of familial Mediterranean fever in Italy is still unknown but recently estimated to be around 1:60,000, probably higher in central and southern Italy.• According to our cohort, the prevalence of FMF in the Abruzzo region is at least 1:45,000, higher than expected. Differently, we found lower prevalence rates of the disease in Apulia and Sicily.Key Points• Italian children with familial Mediterranean fever tend to have an early age of onset, primarily manifesting with recurrent fever and characteristic associated symptoms.• Many MEFV gene variants are present in Italian children with familial Mediterranean fever, and these patients are most often heterozygous, exhibiting a mild to moderate phenotype.• The prevalence of familial Mediterranean fever in Italy is still unknown but recently estimated to be around 1:60,000, probably higher in central and southern Italy.• According to our cohort, the prevalence of FMF in the Abruzzo region is at least 1:45,000, higher than expected. Differently, we found lower prevalence rates of the disease in Apulia and Sicily. [ABSTRACT FROM AUTHOR]