Myxedema or severe hypothyroidism is clinical condition where the thyroid gland does not produce any thyroid hormone. In some cases, myxedema condition is also being referred to as underactive thyroid. Myxedema typically present with a distinct facial appearance, hoarse slow speech, and dryness of the skin.
Vocal cord paralysis is the loss of function and movement of the vocal cord as a sequel to dysfunction of the vagus nerve or its distal branch, the recurrent laryngeal nerve. Vocal cord paralysis is a subset of vocal cord or fold immobility which is a broad term for all causes of vocal cord dysfunction.