Media type: E-Article Title: Treatment of cremaster synkinesias with botulinum toxin A: A video case report Contributor: Ritter, Martin A.; Frese, Achim; Dziewas, Rainer; Knecht, Stefan; Evers, Stefan imprint: Wiley, 2006 Published in: Movement Disorders Language: English DOI: 10.1002/mds.21040 ISSN: 0885-3185; 1531-8257 Origination: Footnote: Description: <jats:title>Abstract</jats:title><jats:p>Synkinesias secondary to nerve lesions and aberrant re‐innervation are well‐known phenomena especially after lesions of the facial nerve. Synkinesias can successfully be treated with botulinum toxin A (BTx A). Synkinesias of the cremaster muscle have not been described or treated to date. We present the case of a 62‐year‐old man who developed synkinesias of both cremaster muscles after extensive laparatomy for esophageal cancer. Treatment of synkinesias with various oral medications had been unsuccessful. Electromyography‐guided injections of BTx A in both cremaster muscles (15 MU on the right and 10 on the left) led to significant symptom relief for an average of 8 weeks. We present the case including pre‐ and posttreatment video clips. © 2006 Movement Disorder Society</jats:p>