Case 56. 

Liver lesion in a wild rat (Clethrionomys rufocanus bedfordiae) in Hokkai+C110do
　 　 　 　
　
Protoscolex in the cyst (HE, high power).
 　
　 　 　 　

　

 　 Hooklets and calcified spherules are histologically unique to the protoscolex. The final host of this small tapeworm (2 mm in length) is the fox and dog.