Hypothenar hammer syndrome: caused by a muscle anomaly? A case report with review of the literature
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The hypothenar hammer syndrome (HHS) is a rare entity of secondary Raynaud’s phenomenon. The blunt hypothenar trauma causes a lesion of the vessel wall with a consecutive thrombosis or aneurysm of the ulnar artery at the Guyon’s canal. Different risk factors are discussed such as nicotine abuse, or a muscle anomaly in the Guyon’s canal. To date, there are five case reports published about muscle anomalies and HHS. We present a case of a 51-year-old shipbuilder with a unilateral HHS on his right dominant hand with a bilateral muscle anomaly. We successfully treated the patient by resection of the aneurysm without a resection of the atypical muscle.
KeywordsHypothenar hammer syndrome Accessory abductor digiti minimi muscle Guyon’s canal Arterial thrombosis of the hand
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The authors declare that they have no conflict of interest.
Ethical approval is not required.
Informed consent has been obtained from the patient included in this study.
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