Abstract
We report the case of a 30-year-old woman affected by hereditary neuropathy with liability to pressure palsies (HNPP), who developed a painless left axillary neuropathy after sleeping on her left side, on a firm orthopaedic mattress, in her eighth month of pregnancy. Electromyography (EMG) showing neurogenic signs in the left anterior and middle deltoid, and normal findings in the left teres minor, posterior deltoid and other proximal upper limb muscles, demonstrated that the lesion was at the level of the axillary anterior branch. A direct compression of this branch against the surgical neck of the humerus seems the most likely pathogenic mechanism. This is the first documented description of an axillary neuropathy in HNPP. Knowledge of its possible occurrence may be important for prevention purposes.
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