<prompt> All are TRUE about hyperparathyroidism, except -Commonly occurs after thyroidectomyMay cause hypercalcemiaSolitary adenoma is the most common causeNone of the above  <response>: Thyroid crisis or storm - It is a rare disorder nowadays It is an extreme form of thyrotoxicosis which is precipitated by stressful illness, thyroid surgery or Radioiodine administration. It presents with symptoms of thyrotoxicosis which are - Severe tachycardia, Arrhythmias Marked delirium Vomiting DiarrhoeaDehydration High fever The mortality rate is very high. 