[Vitiligo, hyperthyroidism, periodic paralysis and myasthenia gravis. Report of a case]

A 25 year old with vitiligo por 6 years now. For one year has being presenting hyperthyroidism, myasthenia gravis and periodic paralysis. The normalization of the thyroid function was followed by a significant improvement of the myasthenic syndrome that did not interfere with the paralytical attacks.