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Novel Phenotype of LMNA Variant c.154C>G Affecting Heart, Liver, and Lipid and Iron Metabolism: A Case Report.
Curēus 2023 May
Mutations in the LMNA gene cause heterogeneous phenotypes such as myopathy, progeroid syndromes, hereditary neuropathies, cardiomyopathies, or lipodystrophies. A specific LMNA mutation manifesting as dilated cardiomyopathy (dCMP), and iron metabolism disorder has not been reported. The patient is a 50-year-old female with palpitations and fatigue since childhood, hyperlipidemia for 25 years, gastroesophageal reflux for 20 years, arterial hypertension for eight years, and iron deficiency for one year, requiring intravenous iron supplementation. Family history was positive for dCMP, malignant ventricular arrhythmias (MVAs), and sudden cardiac death (SCD). She was diagnosed with dCMP at the age of 49. Genetic workup revealed the variant c.154C>G (p.Leu52Val) in LMNA , which was also found in two female cousins. Because of ventricular tachycardia in the long-term ECG recordings, an implantable cardioverter-defibrillator (ICD) was implanted in addition to antiarrhythmic, antihypertensive, heart failure, and lipid-lowering treatment. With this therapy, the patient remained in stable condition during the one-year follow-up and was able to successfully carry out her job. In summary, this case shows that the variant c.154C>G (p.Leu52Val) in LMNA manifests not only with dCMP, but also with hyperlipidemia, steatosis, gastroesophageal reflux, arterial hypertension, and iron deficiency. Primary prophylaxis with an ICD and additional symptomatic treatment can stabilise the condition and eventually prevent familial SCD.
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