EXTRACT VI. A. 



ON THE INCIDENCE AND DEVELOPMENT OF CYSTIC 

 GROWTHS, TUMOURS, AND NEOPLASMS, AS RE- 

 LATED TO ARRESTED AND IMPEDED CIRCULATION 

 AND EXCRETION. 



As a general principle in the initiation, and incidence, of 

 cystic tumours we would recognise the occurrence of 

 stasis within the vascular media engaged in circulating the 

 various fluids of those structures, or parts, of the body in 

 which they occur, the consequent accumulation of those 

 fluids within the lumina of their vessels, the also con- 

 sequent ballooning of these vessels, the inspissation of 

 their contained fluids, the quasi-organisation of the resul- 

 tant residua, their pseudo-material histological amalgama- 

 tion or blending with the surrounding textures, and the 

 continued or further progress of the pathological processes 

 thus established along the lines of tissue strata of least 

 resistance, and of greatest plasmic supply and re-formative 

 and mal-formative energy. 



While this generalisation applies to cystic tumours 

 generally, it applies with perhaps greatest force to the 

 incidence of those tumours which are found related to the 

 excretory mechanisms of the cerebro-spinal fluid, and of 

 gland ducts generally ; thus a "definite range " of tumours, 

 cystic and others, range themselves at, and around, the 

 great as well as the small neural lymph emunctories and 

 gland exits generally, claiming as their initial cause the 

 arrestment of lymph circulating matter or fluid excretion, 

 and the establishment of consequent pathological changes, 

 which culminate in the production of new structural 

 arrangements, tumours composed of retained effete 



