[Subacute myopathy in a patient with mild Cushing disease manifested by accompanying Kleinfelter syndrome].

A 69-year-old man was admitted because of subacute development of lower limb weakness from one month ago. He showed central obesity, gynecomastia, dorsal fat pad ("buffalo hump"), and proximal muscle weakness in the lower extremities (manual muscle test 4). Needle EMG, muscle MRI and labolatry screening including CPK were negative for neuromuscular diseases, except for the hypogenitalism accidentally detected in MRI.