210 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



lobules varying from about 1| inches to \ inch. It came 

 to the laboratory in the fresh condition, and parts were 

 immediately fixed in Zenker's fluid, cut and stained in 

 various ways. 



Figs. 9 and 12, PI. I, represent parts of the sections 

 stained in Mann's methyl-blue-eosin. The latter figure 

 represents the most characteristic tissue present in the 

 growth — that is loose fibrous tissue, containing small 

 rounded cells. The fibres run straight in the part 

 figured, but throughout the section are places where they 

 run in all directions. The nuclei shown in the figure 

 are of two kinds : small elongated nuclei belonging to 

 the connective tissue fibres, and larger rounded nuclei 

 with a minimum of cell substance. These belong to 

 small cells lying between the fibres. 



This is, of course, quite the typical structure seen 

 in these tumours. Fig. 9, however, shows something 

 rather different. This figure is drawn from a section 

 made through one of the smaller nodular masses. Here 

 the predominant tissue consists of small rounded cells 

 rather closely packed together, and with very few fibres. 

 There are few blood vessels among these cells, but here 

 and there throughout the part of the section nearest 

 to the surface of the tumour are tubular structures. One 

 of these is shown in the section. The internal wall 

 consists of a layer of typical columnar cells, and outside 

 this is a rather thick layer of coarse connective tissue, 

 the fibres of which run concentrically round the vessel. 

 Outside, there is no sharp distinction between the wall 

 of the vessel and the surrounding cellular tissue. The 

 fibres become looser and cells begin to appear between 

 them. These vessels are quite numerous in the outer 

 part of the tumour. They are, of course, a quite unusual 

 feature in the histology of growths of this kind. 



