184 ENDOCRINE GLANDS 



ETIOLOGY. 



On autopsy are found various kinds of pituitary tumors; 

 carcinoma, fibroma, teratoma, cysts, etc., or lesions of the 

 pituitary without tumors; tuberculosis, sclerosis, hyper- 

 ostosis. causing pressure on the pituitary, etc. 



FIG. 13. Pituitary infantilism (Service of Dr. Souques). This 



picture is taken from the book of Dr. S. Chauvet: Pituitary 



Infantilism. A. Maloine et fils. Publishers. 



PATHOGENESIS. 



Just the opposite of acromegalia and gigantism, which 

 are symptoms of hyperf unction of the gland, it is believed 

 that pituitary infantilism is a syndrome of insufficiency of 

 the anterior lobe or hypopituitarism syndrome. This 

 conception is based on the experimental observations of 

 Caselli, Fichera Aschner, Ascoli and Leguani, who, after 



