Magnetic resonance findings may aid in diagnosis of protracted febrile myalgia syndrome: a retrospective, multicenter study.

Orphanet journal of rare diseases 2022 Jan 10

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Protracted febrile myalgia syndrome (PFMS) is a rare complication of Familial Mediterranean fever (FMF). The diagnosis is based on clinical symptoms and is often challenging, especially when PFMS is the initial manifestation of FMF. The aim of this report was to describe the magnetic resonance imaging (MRI) findings in pediatric patients with PFMS. There were three girls and two boys ranging in age from 6 months to 16 years, all of Mediterranean ancestry. Three had high-grade fever, and all had elevated inflammatory markers. MRI of the extremities yielded findings suggestive of myositis, which together with the clinical picture, normal CPK levels, and supporting family history of FMF, suggested the diagnosis of PFMS. Out of most common MEFV mutations tested, one patient was homozygous for M694V mutation, three were heterozygous for M694V mutation, and one was compound heterozygous for the M694V and V726A mutations. MRI may serve as an auxiliary diagnostic tool in PFMS. © 2021. The Author(s).

Citation

Neta Aviran, Gil Amarilyo, Yaniv Lakovsky, Rotem Tal, Jenny Garkaby, Rubi Haviv, Yosef Uziel, Shiri Spielman, Hamada Mohammad Natour, Yonatan Herman, Oded Scheuerman, Yonatan Butbul Aviel, Yoel Levinsky, Liora Harel. Magnetic resonance findings may aid in diagnosis of protracted febrile myalgia syndrome: a retrospective, multicenter study. Orphanet journal of rare diseases. 2022 Jan 10;17(1):15