PMC6661411_01
A) Chest X-ray showing right hemidiaphragm elevation. B) Electroneurography of both phrenic nerves showing an increased duration of the right compound muscle action potential.
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A chest X-ray (Fig. 1A) showed right hemidiaphragm elevation. ENG showed an increased duration of the right compound muscle action potential of the phrenic nerve, suggesting a demyelinating nerve injury (Fig. 1B), while needle EMG of the right hemidiaphragm revealed signs of denervation.