TUMORS. 



483 



under consideration, the term lymphoma seems to be more ap- 

 propriate, although this has been previously disposed of for the 

 designation of the very malignant so-called "small cellular 

 sarcoma." 



Tumors of the structure of the thyroid body are rare, and, so 

 far as I have been able to ascertain their clinical history, of a 

 thoroughly benign nature. Several of the cases which have come 

 under my observation occurred in the lateral region of the neck, 

 independently of the thyroid body. In one case, a tumor of this 

 kind, the size of a man's fist, occupied the region of both upper 

 jaws, having evidently started from the lining membrane of one 

 Antrum Highmori. (See Fig. 183.) 



2. FIBROMA. FIBROUS TUMOR. 



Fibroma is a firm, dense, and opaque growth, either sessile or 

 pedunculated, composed entirely of bundles of a dense interlac- 

 ing fibrous connective tis- 

 sue, which contains only a 

 few blood- vessels. We may 

 cut the tumor at any point, 

 and will always meet with 

 bundles running in differ- 

 ent directions, which are 

 easily recognized with low 

 powers of the microscope. 

 (See Fig. 184.) 



With high powers we 

 ascertain that the bun- 

 dles, like those of physio- 

 logical dense fibrous con- 

 nective tissue, are com- 

 posed of delicate spindles, 



flo<spl v oVp/1 tno-Pth PT- LL ' bundles of flbrous connective tissue, cut longi- 



>tJiy pd/LKeu tOgei er. tudinally, interlacing with similar bundles at right 



Between the Spindles We angles, D-, O, bundles cut obliquely, and F, bundles 



T f, . cut transversely. Magnified 100 diameters. 



find finely granular bio- 



plasson and plastids, mostly reduced to the size of nuclei. The 

 light interstices between the spindles are always traversed by 

 extremely delicate transverse filaments, which interconnect the 

 bioplasson formations contained in the glue-yielding basis-sub- 

 stance. Similar filaments connect the bioplasson formations 



FIG. 184. FIBROMA OF THE VAGINA. 



