Intraneural microcystic lymphatic malformation of the ulnar nerve at the Guyon canal: Unusual cause of ulnar pain in a child.
We present a case of an unusual cause of ulnar pain on a 9-year-old patient. The patient had pain on the ulnar side of the wrist after a fall. MRI showed a poorly defined lesion on the ulnar nerve at Guyon's canal. The initial diagnosis was traumatic neuropathy. Following conservative treatment of symptoms for one year, the pain started again. Therefore, a new MRI was performed where progression of the lesion was observed. Excision of the lesion was performed and the specimen sent for pathologic analysis. The diagnosis was of microcystic lymphatic malformation. The patient had a satisfactory evolution, with complete resolution. This is the first description of a microcystic lymphatic malformation in an intraneuronal location.
Service Orthopedic Surgery and Taumatology of the University General Hospital of Ciudad Real, Spain. Electronic address: inmaglezp86@gmail.com.
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González Pérez
Hand Surgery Unit, Orthopedic and Trauma Department, Infanta Leonor University Hospital, Madrid, Spain; Hand Surgery Unit, Beata Maria Hospital, Madrid, Spain; Surgery Department, School of Medicine, Complutense University of Madrid, Madrid, Spain.
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Corella Montoya
Hand Surgery Unit, Beata Maria Hospital, Madrid, Spain; Pathology Service of University Hospital Infanta Leonor, Madrid, Spain.
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Casado Fariñas
D002648:Child; D019299:Decompression, Surgical; D003937:Diagnosis, Differential; D018737:Hand Strength; D006801:Humans; D008223:Lymphoma / Q000150:complications / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000601:surgery; D008279:Magnetic Resonance Imaging; D010148:Intractable Pain / Q000209:etiology; D012983:Soft Tissue Neoplasms / Q000150:complications / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000601:surgery; D017769:Ulnar Nerve Compression Syndromes / Q000150:complications / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000601:surgery
Guyon canal; Intraneuronal lesion; Microcystic lymphatic malformation; Ulnar nerve; Ulnar pain