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Part HI. — Thirteenth Annual Report 



V. — NOTE ON A TUMOUK FOUND ATTACHED TO THE 

 STOMACH OF A SAITHE. By George Lawrence, Student of 

 Medicine, University of Edinburgh. (Plate VII., ng. 5.) 



The tumour, which was found attached to the stomach of a saithe caught 

 on February 28th, 1895, was forwarded to St Andrews Laboratory by 

 Mr P. Wilson, Fishery Officer, Girvan. 



Naked eye appearance of tumour. — The tumour is well defined, some- 

 what spherical in shape, with a degree of flattening at the poles. It 

 measures inches in diameter, and weighs 2 oz. 6 drs. Its consistence 

 might be described as putty-like, its shape being easily altered by com- 

 pression. There is, however, some slight elasticity present marked by the 

 tendency to return to its original shape. On section, it is seen to be 

 composed of concentric laminae, which can be readily separated from one 

 another (Plate VII., fig. 5). The outermost layer is by far the thickest. 

 The laminae are arranged around a more compact centre of similar struc- 

 ture, the layers of which are not so readily separated. 



Microscopic appearance. — A portion of the external layer was sectioned, 

 micro-carmine being used for staining. The external part of the section 

 was seen to be composed of dense wavy bundles of fibrous tissue, with 

 flattened nuclei here and there interspersed. Amongst this fibrous tissue 

 spaces, more or less elliptical in shape, were to be made out. These spaces 

 were entirely filled with small round nucleated cells, evidently epithelioid 

 in nature. The nuclei in certain of the spaces were very prominent ; in 

 others they were very indistinct. The internal portion of the section is 

 also fibrous in nature, but of much looser structure, showing somewhat 

 alveolar arrangement. A portion of the core or centre of the tumour was 

 also sectioned. Its structure was fibroid also, and of a loose alveolar 

 nature, similar to that observed in the internal part of the section of the 

 external portion. In the sections of the core, blood-vessels were made 

 out, and traces of haemorrhage were visible here and there. 



