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EMG in Hoffmann syndrome showing low-amplitude, short-duration MUAPs

EMG of calf muscles showed low-amplitude, short-duration motor unit action potentials (MUAPs) suggestive of a myopathic disorder. (Courtesy of: Gupta M, Singh R, Lehl SS. Reversible calf pseudohypertrophy in a young male. Research 2014;1:901. Creative Commons Attribution License CC BY. Image cropped and edited by Douglas J Lanska MD to correct focus and exposure.)

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Associated Disorders

  • Endocrine ophthalmopathy
  • Graves disease
  • Graves ophthalmopathy
  • Hashimoto thyroiditis
  • Hoffmann syndrome
  • Hyperthyroid myopathy
  • Hypothalamic dysfunction
  • Hypothyroid myopathy
  • Kocher-Debre-Semelaigne syndrome
  • Pituitary dysfunction
  • Thyroid-associated ophthalmopathy
  • Thyrotoxic myopathy
  • Thyrotoxic ocular myopathy