Tremor-Dominant Movement Disorder in ANKRD11- Associated KBG Syndrome

Stehr, Antonia M. ; Koeglsperger, Thomas ; Jacob, Maureen; Rhodio, Valerio; Winkelmann, Juliane ; Hopfner, Franziska und Zech, Michael (2024): Tremor-Dominant Movement Disorder in ANKRD11- Associated KBG Syndrome. In: Tremor and Other Hyperkinetic Movements, Vol. 14, No. 1, 48

Abstract

Background: KBG syndrome is a monogenic disorder caused by heterozygous pathogenic variants in ANKRD11. A recent single-case study suggested that the clinical spectrum of KBG syndrome, classically defined by distinctive craniofacial traits and developmental delay, may include movement disorders. Case report: We report a 24-year-old patient harboring a pathogenic de novo ANKRD11 frameshift variant. The phenotype was dominated by a progressive tremor-dominant movement disorder, characterized by rest, intention and postural tremor of the hands, voice tremor, head and tongue tremor, increased muscle tone and signs of ataxia. Additionally, the patient had a history of mild developmental delay and epilepsy. Discussion: Adding to the recently described individual, our present patient highlights the relevance of movement disorders as a clinically relevant manifestation of KBG syndrome. ANKRD11 pathogenic variants should be considered in the differential diagnosis of combined tremor syndromes.

• Item Type: Journal article
• Faculties: Medicine > Munich Cluster for Systems Neurology (SyNergy); Medicine > Institute for Stroke and Dementia Research (ISD); Medicine > Medical Center of the University of Munich > Neurological Clinic and Polyclinic with Friedrich Baur Institute
• Subjects: 600 Technology > 610 Medicine and health
• ISSN: 2160-8288
• Language: English
• DFG: Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - 390857198