Claw Hand in Acute Motor Axonal Neuropathy Variant.

Background: Guillain-Barré syndrome (GBS) is an acute autoimmune polyradiculoneuropathy with various subtypes, including the acute motor axonal neuropathy (AMAN) variant. Distal muscle weakness is typically rare in AMAN. Myositis, an inflammatory muscle condition, is infrequently documented in GBS. This case report presents an unusual presentation of GBS with unilateral claw hand and myositis.

Case description: A 55-year-old male presented with bilateral limb pain and weakness, progressing to significant motor impairment over 5 days. Symptoms began after a brief febrile illness with gastrointestinal distress. Upon examination, the patient exhibited decreased muscle strength in all limbs, dysphagia, and partial clawing of the left hand. Neurological assessment showed cranial nerve involvement and dysautonomia. Blood tests revealed elevated creatine phosphokinase (CPK) levels, and cerebrospinal fluid (CSF) analysis showed high protein without cellular abnormalities. Diagnosed with the AMAN variant of GBS, the patient was treated with intravenous immunoglobulin (IVIG) and antibiotics. Physiotherapy for speech, limbs, chest, and swallowing was initiated. Gradual improvement was observed, with increased limb power by the third week, although swallowing difficulties persisted longer.

Conclusion: This case highlights a rare presentation of the AMAN variant of GBS with unilateral claw hand and myositis. The findings suggest that elevated CPK levels in GBS may not directly indicate myositis but could be secondary to the syndrome. Prompt diagnosis and treatment of the patient for recovery have been emphasized. This report underlines the need to consider GBS in patients presenting with atypical motor impairments and elevated CPK levels.