[A case of T1 radiculopathy caused by intervertebral disc herniation with cervical angina].

A 65-year-old man presented to the emergency department with the complaints of left anterior chest and back pain, numbness in the left medial arm, and weakness in the left hand grip. Myocardial infarction was suspected, but later ruled out, and the patient was subsequently referred to our department. Among the intrinsic muscles, the left abductor pollicis brevis was the most severely weakened, and there was a sensory disturbance in the left T1 region and left Horner's sign. An MRI T₂-weighted image of the cervical spine showed a herniated disc on the left lateral side at the T1/2 level, suggesting compression of the T1 nerve root. Cervical angina is a rare, angina-like anterior chest pain due to cervical spine diseases. It is often reported in patients with C6 and C7 radiculopathy. The most severe weakness in the abductor pollicis brevis muscle in T1 radiculopathy is important to distinguish it from C8 radiculopathy.