[Hygroma of the posterior cranial fossa. Case report]. / Igroma della fossa cranica posteriore. Relazione di un caso.

Posterior fossa hygroma is a rare entity. In a series of 553 cases of surgically treated traumatic subdural lesions, reported by Jamieson and Yelland, only 14 were in the posterior fossa; of these 7 were hygromas and 7 haematomas, giving an incidence of only 1,4% of all subdural haematomas. This report describes a case of a posterior fossa hygroma, that occurred in a 16-years-old boy, 4 days after an occipital head injury.

[Trigeminal neuralgia: interpretation of the results of the Dandy method of rhizotomy]. / Nevralgia del trigemino: interpretazione dei risultati in 29 casi di rizotomia alla Dandy.

The patterns of sensory loss in 29 cases of Juxta pontine trigeminal rhizotomy are reported. The section of 70% of the portio major gave a similar impairment of tactile, thermal and pain sensibility in the facial area corresponding to the portio of the nerve section in all the patients. These findings do not support Jannetta and Rand's statement that partial to complete section of the porto major at the pons with complete preservation of the intermediate fibre does not affect the perception of light touch. The reported data suggest: 1--intermediate fibres are not mode specific fibres for light touch; 2--clear separation between thermoalgesic and tactile afferent rootlets does not exist in the trigeminal root; 3--saving the portio minor and the intermediate fibres ensures the preservation of perception of tactile, thermal and pain sensibility, thus avoiding postoperative painful anesthesia and keratitis.

[Intradural rupture of an intervertebral disk]. / Rottura intradurale del disco intervertebrale.

Since the first description of ruptured lumbar disc, erosion of a fragment of disc through the dura mater has been mentioned only rarely. The authros report two cases occurred among 1,078 herniated discs surgically treated in their department over a period of 8 years, from January 1st., 1970 through March 31st., 1978. Various factors that might contribute to this relatively rare complication of disc disease are mentioned, and literature on the subject is summarized.