All are TRUE about hyperparathyroidism, except -
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
 Diarrhoea
Dehydration
 High fever
 The mortality rate is very high.
Commonly occurs after thyroidectomy
May cause hypercalcemia
Solitary adenoma is the most common cause
None of the above