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Primary vs Postparalytic Hemifacial Spasm—Reply
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In reply
We would like to thank Dr Tan and Dr Chan for their comments regarding our study on HFS. We agree that the main difference found between our patients and their series of HFS (ie, a higher prevalence of secondary cases) may be simply due to selection bias. Indeed, our academic clinics are referral centers for difficult cases of movement disorders for northern, central, and southern Italy, and therefore we more frequently see patients with secondary HFS, who may be more difficult to treat with botulinum toxin therapy.
We also agree with the possibility that the higher prevalence of left-sided HFS could be linked to anatomical reasons, such as the higher prevalence of this side of abnormal arterial vessels leading to neurovascular contact. However, a formal neuroimaging study in patients with HFS was outside the aim of this article; perhaps it would be an interesting subject to address in . . . [Full Text of this Article] AUTHOR INFORMATION
Carlo Colosimo, MD;
Matteo Bologna, MD;
Simona Lamberti, MD;
Laura Avanzino, MD;
Lucio Marinelli, MD;
Giovanni Fabbrini, MD;
Giovanni Abbruzzese, MD;
Giovanni Defazio, MD;
Alfredo Berardelli, MD
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Primary vs Postparalytic Hemifacial Spasm
Eng-King Tan and Ling-Ling Chan
Arch Neurol. 2006;63(8):1204.
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A Comparative Study of Primary and Secondary Hemifacial Spasm
Carlo Colosimo, Matteo Bologna, Simona Lamberti, Lucio Avanzino, Laura Marinelli, Giovanni Fabbrini, Giovanni Abbruzzese, Giovanni Defazio, and Alfredo Berardelli
Arch Neurol. 2006;63(3):441-444.
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