DEPARTMENT OF SURGERY. 
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621 
FIG. 28. 
SYNCEPHALIAN MONSTROSITY, FROM THE McKILLIP OBSTETRICAL CLINIC, 
JANUARY, 1899. 
three heads ( cephalotridymus ), and those with three bodies 
(somstotridymus') . There are a number of other varieties which 
the veterinarian frequently finds, that are caused by the union 
of foetuses, which cannot be delivered even by embryotomy. 
Most of these monstrosities are larger than a large foetus ; this, 
with their conformation makes it impossible to pass the foetus 
through the pelvic outlet; and to dissect them while in the 
cavity is a difficult procedure ; therefore, the most appropriate 
method of removing them is by Caesarian section. When the vet¬ 
erinarian has ascertained that the foetus is a monstrosity, the 
operation should not be delayed ; the chances of recovery from 
such an operation are diminished by deferring it. Procrastina¬ 
tion deprives the surgeon of success in such instances. 
5. Pseudo-pregnancy.— This is a term that is applied to 
an anomalous development of some structureless object in the 
uterus, which is a result of conception. To class tumors of a 
cancerous or sarcomatous origin as pseudo-pregnancy, would 
not be considered correct by obstetricians; but, to determine to 
a certainty whether the condition resulted from conception or 
not is often difficult, unless the animal is one that is never left 
