ACCESSORY OR ABERRANT THYROIDS 455 



" rests " or remnants of thyroid tissue, but are found in nearly all 

 individuals. 



The colloid follicles of the aberrant thyroids are usually small, 

 though, in the larger specimens of these bodies, they may attain 

 as great a size as those of the thyroid itself. The cell columns 

 without colloid are more numerous than in the thyroid gland, 

 giving to the aberrant bodies a decidedly cellular appearance. 



Fia. 360. FROM THE BORDER OF A MASS OF ABERRANT THYROID TISSUE OF MAN, 



OCCURRING IN THE REGION OF THE PARATHYROID GLANDS. 



Hematein and cosin. Photo, x 204. 



Each aberrant mass is usually inclosed by a very thin connective 

 tissue capsule which sends delicate processes between the cell 

 groups. The epithelial cells retain all the characteristics of those 

 of the thyroid gland, and can be readily distinguished from the 

 epithelium of the parathyroid glands with which the accessory 



