Tumours of Lower Jaw. 401 



Although the limits of the tumour are fairly well defined, 



there is no distinct capsule. From this fact, as well as from 



the comparatively rapid growth of the tumour, a return might 



have been expected, and its absence confirms the view held of 



the relatively simple character of these tumours. This tumour 



has the usual ' microscopical characters of a myeloid-celled 



sarcoma. G. C. 2728. 



Presented by Joseph Bell, F.R.C.S.E. 



6. 486. Myeloid Tumour of the Lower Jaw.— Portion of the 

 right half of a lower jaw, near the angle — in spirit, illustrating 

 the above. 



A large central tumour has grown outwards, partly expand- 

 ing and partly replacing the bone. G. C. 3141. 

 Presented by Macdonald Brown, F.R.C.S.E. 



6. 487. Tumour of the Lower Jaw of a Sheep.— Left half of 



the lower jaw of a sheep — macerated, illustrating the above. 



There is a hollow, rounded tumour at the symphisis. Pre- 

 sented as a specimen of "spina ventosa." G. C. 1850. 

 Presented by John Campbell, F.R.C.S.E., 1837. 



6. 488. Epithelioma involving- the Lower Jaw.— Portion of 



the left half of a lower jaw, with adjacent soft parts — in spirit, 

 illustrating the above. 



A broken-down (probably secondary) epitheliomatous tumour 

 has been attacking the outer surface of the jaw. Previously 

 described as a "carcinomatous tumour." G. C. 1186. 



Presented by Adam Hunter, F.R.C.S.E., 1828. 



6. 489. Epithelioma involving* the Lower Jaw.— Section of 



piece of a lower jaw — in spirit, illustrating the above. 

 It was removed for recurrent epithelioma. 



The alveolar border has been attacked, and |^has been 

 absorbed by the advancing tumour, some of which is seen in 

 the interior. G. C. 2889. 



Presented by Professor T. Annandale. 



2c 



