Syphilitic Necrosis. 309 



From the skull of a young gentleman who died of affection of the 

 spine. 



The piece of bone is markedly irregular on both surfaces, 

 and presents the usual characteristics of a syphilitic sequestrum, 



G. C. 1620. 

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



6. 269. Sequestrum after Syphilitic Disease of the Skull. — 



Sequestrum (sawn through at one spot), formerly described as 

 " mercurial exfoliation " of both sides of the skiill. 



The necrosis has involved the whole thickness of the skull, 

 and both surfaces, but especially the inner, show the roughness 

 and irregularity characteristic of a syphilitic sequestrum. 



F. P. C. 481. 



6. 270. Sequestrum after Syphilitic Disease of the Skull. 



— Sequestrum involving the whole thickness of the skull. 

 Both surfaces show irregularity characteristic of a syphilitic 

 sequestrum. G. C. 1167. 



e. Specimens illustrating healing after separation of syphilitic sequestra. 



6. 271. Syphilitic Disease of the Skull after Separation of 



Sequestrum. — Frontal portion of a calvarium, with scalp — in 

 spirit, illustrating the above. 



Just below the roots of the hair, to the right of the middle 

 line, there is a small healed ulcer of the skin, with a small frag- 

 ment of necrosed bone on its base. The margins of the ulcer 

 are smooth, and, though somewhat overhanging, seem completely 

 covered with epithelium. On the floor below the necrosed 

 fragment the bone is covered by a thin layer of fibrous-looking 

 material, possibly epithelium. The interior of the bone has 

 dura mater clinging to it in many places, and where bare shows 

 marks of increased vascularity. The skull itself is thickened 

 and condensed. B. C. i. 7. M. 1. 



