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We report two patients with upper limb neuropathic features. Nerve conduction studies demonstrated a reduction in sensory nerve action potentials, and motor electoneurography revealed conduction block suggesting a multifocal acquired demyelinating sensory and motor neuropathy. Brachial plexus hypertrophy abnormalities were identified on MR scanning in both cases.
Patient No 1
A 48-year-old woman with no relevant medical history initially developed parasthesias and a distal motor deficit in the left upper extremity at the age of 46 years. Neurological examination revealed a left C7–D1 dependent muscles weakness (2/5), hypoesthesia in the 4–5th finger and in the medial region of the left forearm, fasciculation in the left hypothenar region, no triceps reflex and left thenar region hypertrophy. Nerve conduction studies demonstrated a reduction in sensory nerve action potentials, and motor electoneurography …
Competing interests: None.
Ethics approval: Ethics approval was obtained
Patient consent: Obtained.