Unusual neurologic manifestation of compressive radiculopathy of the first thoracic root (T1)

Introduction: First thoracic (T1) root lesions are uncommon and not easily defined. Only few case reports of such patients are available. We report one further patient with isolated T1 root lesion with a quite unusual presentation, which has not been described so far. Case report: A 70-year-old man presented with a 4-week history of left sided neck and shoulder pain irradiating in the left ulnar side of the forearm and digits 4 and 5. He described a reduced handgrip. His examination showed hypesthesia to pin testing in dermatome C8, but not in T1. Motor testing showed a moderate weakness of the APB and the intri…