348 ENDOCRINE GLANDS 



mucosa. It is due to a paralysis of the vaso-constrictor 

 nerves or to a stimulation of the vaso-dilators of central or 

 peripheral origin. 



Chronic angio-neurotic edema (Meige) acquired or con- 

 genital, familial or individual is believed by Sicard and 

 Laignel-Lavastine to be due to an alteration of the sympa- 

 thetic, causing an exaggerated transudation of the lymph 

 in the subcutaneous tissues. 



4. INTERMITTENT PERIODIC HYDRARTHROSIS. The 

 majority of writers consider this to be a motor neuritis. In 

 some cases it is believed to be due to thyroid insufficiency. 



