Hirayama disease (HD), also known as juvenile muscular atrophy of the distal upper extremity, is a disease primarily involving the anterior horn motor neurons of the cervical spinal cord. It predominantly occurs in young males and is characterized by slowly progressive muscular atrophy of the upper limbs, usually unilateral, with a benign and self-limiting course.
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This section is being translated and completed.
This section is being translated and completed.
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This information is for health education only and is not a diagnosis. Please consult a qualified clinician if you feel unwell.