302 CLINICAL APPLIED ANATOMY. 



Primary tumours of the suprarenal bodies may be carcino- 

 matous, sarcomatous and possibly gliomatous. The central part 

 of the suprarenal is derived from an ingrowth of the abdominal 

 sympathetic, and this may account for the presence of gliomatous 

 elements. The cortical part is developed within the Wolffian 

 ridge. The epithelial and connective tissue elements of this may 

 give origin to the other varieties of new growth mentioned. 



Malignant tumours of the suprarenals lie high in the abdomen 

 and may from their position simulate tumours of the liver, 

 kidney or pancreas. The tumours are adjacent to the inferior 

 vena cava, the suprarenal and the renal veins, which they may 

 invade. Extension may occur from the right suprarenal into the 

 liver. Growths on either side may invade the adjacent kidney, 

 and if they open into its pelvis may be a cause of hsematuria. 



THE PITUITARY BODY. 



Acromegaly, a condition characterised by overgrowth of the 

 tissues of the extremities, and allied to gigantism, is generally 

 associated with enlargement of the pituitary body The enlarge- 

 ment may be simple or malignant. As a result, the sella turcica 

 is enlarged and in part absorbed. The olivary and clinoid 

 processes may disappear. The sphenoidal air cells may be 

 opened up, or the base of the fossa entirely destroyed. The 

 cavernous sinus and Gasserian ganglion have been invaded. 

 Characteristic alterations in the visual fields arise from pressure 

 on the optic commissure, which lies in front of the stalk of the 

 pituitary body. As a result bitemporal hemianopia may be met 

 with, or a more general contraction of the fields may occur. 



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