TUAKJRS. 



329 



in-eg'ulai- lobes. These tumors arc usually mottled, thouoh they 

 may be uniform and of a white or light \;rav cohir. 



Microscopically, adenosarcomata are comijoscd of epithelium 

 and connective tissue. The amount and arrangement of the two 

 types (if tissue are varialjle. bonie areas may be entirely epi- 

 thelium (adenomatous) and other areas connective tissue (sarca- 

 matons). The epithelium is arranged as grandular tissue, 

 the tubes and acini of which are irregular in shajje and si;^e 

 and may contain disintegrating, epithelial cells or their products. 

 The epithelium is usually arranged in a single layer in the tubes 

 and acini though they may be grouped in some instances and 





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f- f.~ 



Fig. ]si' — Si (vlion nr a C.\start('nnnia of ihr mtimmar\- ;4)arnl of a slu'P, shouin 

 1. f.'na,^'u]ati.-d cystic crintinls siiri-oundcd l,y aa atrophied acinous wall 



thus ap|";car similar ti) carcinomati )iis nests of cells. The epithe- 

 lial cells are small and usuallv contain finelv granular chromatin. 

 The connective tissue cells are iisualK- fusiform although they 

 mav be nearly spherical in shape. They contain relatively large 

 nuclei in which granules mav be observed. 



Cystadenoma is also common, especially in those adenomata 

 that prriduce secretion. They are found in the adenomata of the 

 mammary and sebaceous glands. 



Hypernephroma are tumors which may be classed either with 



