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Neuropathy is one of the major reasons of morbidity in diabetes mellitus (DM). We presented a 64-year-old male who was a case of type 2 DM for >6 years. He presented with orthopnea and respiratory failure secondary to bilateral phrenic neuropathy and resultant diaphragmatic palsy. Clinical examination, ultrasound, and nerve conduction studies confirmed the bilateral involvement of the phrenic nerves. Phrenic neuropathy may be an important, albeit a rare complication of diabetes, and hence, diaphragmatic dysfunction associated with diabetic phrenic neuropathy should be considered in any patient with unexplained breathlessness, orthopnea, and respiratory failure.

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