14 QUATERCENTENARY STUDIES IN PATHOLOGY 



Blood' Vessels. — In all parts the tumour is very vascular. In the 

 course of dissection, several large blood-vessels were traced out, and, in 

 the microscopic sections, numerous blood-vessels and capillaries are to 

 be seen. 



Attachment of the Tumour. 



The mouth cavity of the fcetus is distended by the stalk of attach- 

 ment of the tumour. The lips, although compressed, arc quite free, the 

 upper lip being pushed upwards, while the lower lip is turned inwards 

 over the alveolar margin of the lower jaw. The lower jaw is pushed 

 downward and backward, so as to be in a plane much posterior to that of 

 the upper alveolar margin. The mouth measures 48 mm. from angle to 

 angle, and 40 mm. from above down. 



The stalk of the tumour is attached mostly to the under aspect of 

 the hard palate, but its posterior part is continued up along the posterior 

 border of the nasal septum to the under aspect of the basi-sphenoid. At 

 its attachment the stalk measures 24 mm. by 22 mm. To permit of the 

 posterior part of the stalk passing up to the sphenoid, the soft palate is 

 completely split into two halves. Each part of the soft palate is com- 

 plete, but is compressed backwards against the lateral wall of the 

 naso-pharynx, where each terminates in a uvula-like process. For its 

 size and fairly extensive attachment, the stalk causes comparatively 

 slight disturbance of surrounding parts. The cartilaginous nasal septum 

 is complete and well developed. The left nasal fossa is normal and has 

 well developed turbinals ; the right also is little altered, but in it lies a 

 tongue-shaped body which is attached to the stalk of the tumour, and 

 passes forwards round the posterior border of the hard palate and 

 extends to the anterior nares protruding as a small nodule from the 

 nostril. This tongue-shaped body is covered with fine hairs and 

 sebaceous material, and compresses somewhat the turbinals of the right 

 nasal fossa. 



The floor of each nasal fossa, as seen from above, is intact, and 

 covered by mucous membrane. On examining the hard palate, from the 

 under aspect, its anterior half is complete, but behind it is prolonged 

 down on the sides and front of the stalk, as thin, bony laminae. Thus 

 when the stalk is removed the hard palate is deficient behind over an 

 area measuring 18 mm. from before back and 21 mm. from side to side. 



(188) 



