Differential diagnosis Because the<unk>  overlaps with so many other similar conditions, such as hypertensive crises, stimulant intoxication or overdose, or even panic attack, and because the treatments for these overlapping conditions are largely alike, it is not necessary to obtain a differential and definitive diagnosis before initiating treatment. However, analysis of the patient's medical history, checked against the possible causes of the<unk>  such as those above, should be done, because some<unk> s can be caused by serious underlying conditions. If a patient has an<unk>  and all or most of the other factors are ruled out, the<unk>  could lead to the discovery of a pheochromocytoma, which can become malignant. However, not all cases of<unk>  have an identifiable cause. Like a seizure, sometimes a patient has a single one, or perhaps a few, and then does not for the rest of their life. The mechanisms of idiopathic<unk>  are very poorly understood. Serotonin syndrome, in which an excess of serotonin in the synapses causes a similar crisis of hypertension and mental confusion, could be confused with an<unk> . Serotonin, being a tryptamine (non-catecholamine) involved in higher brain functions, can cause dangerous hypertension and tachycardia from its effects on the sympathetic nervous system. Symptoms caused by excessive<unk>  signalling can occur alongside those of serotonergic signalling. One example would be: overdose of drug(s) influencing multiple targets including serotonin, and<unk>  systems, with concurrent MAOI use). Abnormal echocardiograms, or chest pain are indicative of<unk>  crisis. On the other hand, uncontrollable slow, rhythmic, and/or jerky movements, contractions and tension-often in every part of the body, dangerously high fever, eye rolling, and bruxism are more indicative of serotonin syndrome.
Adrenergic storm
Cholinergic crisis
Vasoplegic syndrome
Euthyroid sick syndrome
Thyroid storm
Permissive hypotension
Vasodilatory shock
Adrenal crisis