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Acta Clin Belg. 2011 Mar-Apr;66(2):129-31.

A woman with recurrent "infections" since birth--a new mevalonate kinase mutation.

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Unité de Traitement des Immunodéficiences, Hôpital Erasme, Bruxelles, Belgique.


A tired 32-year-old woman complaining of tiredness was referred for work-up of a possible immune deficiency. She had a history of recurrent infections since birth, which usually responded to antibiotics within a few days. Her mother, a nurse, had reported that early charts had disappeared. Munchausen's by proxy was suspected for years. Careful anamnesis indicated possible recurrent fever. Serum IgD levels were high, which led us to suspect Hyper IgD Syndrome. Sequencing of the mevalonate kinase gene revealed 2 mutations, leading to amino acid substitutions: one already described (V3771) and R40W: never reported before. Mevalonate kinase activity was very low in the patient's peripheral blood cells. We used the "Poly Phen" prediction program successfully. Our experiments confirmed the diagnosis of mevalonate kinase deficiency. We used steroids to abort recurrent crises.

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