✓ The authors report 10 cases of cerebral infestation with paragonimiasis westermani seen in Ube, Japan, from 1954–1968. Nine were treated surgically. The clinical, roentgenological, parasitic, and pathological characteristics are described and discussed in detail as well as the surgical and chemotherapeutic management.

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SUMMARY A new operative method, ventriculolymphangiostomy, intending to drain intraventricular fluid into the thoracic duct was devised. The operative technique consisted of the communication between the lateral ventricle and the thoracic duct at the level of the 9th thoracal vertebra with the aid of a vinyl tube. The new shunting operation was applied to three patients for the purpose of treating hydrocephalus obstructivus. After the operation the shunting route was demonstrated to be functioning without any severe complications, but obstructed in all the patients within a relatively short period of time, probably in the course of one to two weeks after operation. The occlusion was disclosed to be attributed to the connective tissue proliferation in the thoracic duct. Our clinical experiences and the results of our experimental studies on the thoracic ducts of living dogs showed that the chief fault of our shunting operation might be the connective tissue proliferation in the recipient place for internal drainage, i. e. an irritative effect of the inserted vinyl tube. It should be necessary to search for a tube with minimal irritative effect, when used in establishing the shunting route, in order to obtain its persistent patency.

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