ACEOMEGALY 821 



portion Its posterior margin formed by the crests of the petrous hone is 

 markedly irregular and sharpened. The sella turcica is enormously en- 

 larged, measuring 36 mm. antero-posteriorly. The anterior clinoid pro- 

 cesses are lengthened, sharpened and displaced laterally, the distance be- 

 tween their points being 45 mm. The middle clinoid processes are com- 

 pletely destroyed. The dorsum sellae and posterior clinoid processes are 

 destroyed except for a small irregular, sharpened ridge at the base The 



Fig. 8. Region of sella turcica showing bony deposits in its floor and destruction 

 Of posterior clinoid processes. (Case of Dean Lewis.) 



floor of the sella is entirely destroyed, establishing a communication with 

 the sphenoid sinus. The lateral margins of the sella are entirely eroded. 

 There are two wart-like excrescences of very spongy bone on the anterior 

 sellar wall, and similar excrescences about the margin of the communica- 

 tion with the sphenoid sinus. The margins of the convolutional impres- 

 sions in the temporal fossa are markedly elevated, some of them being 

 sharp but most of them rounded and rough. The posterior openings of 

 the optic foramina are considerably narrowed and flattened, especially on 

 the left side, but the anterior openings into the orbits are of normal size. 



