Papilloma. 



385 



On the skin and nmcons membranes covered with <;quamons 

 epithelium they occur as rounded projections, sometimes only 

 as large as a pea or nut (zvarts, z'crniccc) , simple local hyper- 

 plasias of the papillary body with smooth epidermal covering; or 

 they sometimes occur in clumps, like grapes, as cauliflower 

 tumors of the size of a tist [ paj^illouia tiibcrositiii, polyposuin. coral- 

 IlforiJic), with superficial subdivisions, provided with l)road 



f 





^'- 





'1.^^ 



X J 



if. 





y^-j 



< 



-\.;V 



'^'^^f; 



It. 3 



klfis 11 \ 



y Jl / r ^'^^^r^ 





Fig. 113. 

 Section (,f papilloma of cow. 



peduncks or hanging suspended by a thin stretched-out pedicle ; 

 or again as thread-like or bristle-like projections (pa/^iUonia fiU- 

 forme). 



Under the microscope, varying with these external shapes 

 of the growth, the connective tissue, wdiich is made up merely 

 of spindle cells and fibrils with bloodvessels, may be seen as 

 papillae of varying length and thickness and of all sorts of 

 shapes, with knotted and clubbed branches and secondary point- 

 ed projections; and the epiderm in a single* or multiple layer 

 extends over this, following the depressions and clefts, in which 



