Removal of the preputial diverticulum in swine.

A new technique for removal of the preputial diverticulum in swine was performed on 33 sexually intact male potbellied pigs, 12 domestic boar cadavers, and 4 domestic swine (2 sexually intact males and 2 barrows). With each pig under general anesthesia, the body and horns of the diverticulum were everted through the preputial orifice and excised. In some cases, the stump of the diverticulum was sutured. Remaining tissues were allowed to retract through the preputial orifice. The technique was more rapid than the conventional method because skin incision and blunt dissection were unnecessary. Although the technique was developed as a preventive sanitary procedure to accompany routine castration of pet pigs, it has application to domestic swine practice.

Chiasmatic gliomas of childhood. A reappraisal of natural history and effectiveness of cranial irradiation.

Disagreement exists concerning the natural history and treatment of chiasmatic gliomas (CG) of childhood. We reviewed our experience in 21 cases of surgically verified CG with a median age of 4 years at time of diagnosis, followed for a median of 5.3 years (range 3-14.8 years). Initial treatment included radiation therapy (RT) in 18 patients, chemotherapy in 2, and observation in 1. Disease recurrence, defined as progressive visual or neurological deterioration, was documented in 10 children (48%), occurring at a median of 6 years after diagnosis. 5-year actuarial survival was 89%, but fell to 60% by 10 years. Visual improvement after RT was uncommon, occurring once. Intellectual deficits were noted in 5 of 17 survivors. We compared our results to that of other patients reported and concluded that: (1) CG may act aggressively independent of their location in the visual pathway at time of diagnosis; (2) the beneficial effects of RT are difficult to document; (3) progressive disease may occur late in the course of illness, and (4) intellectual sequelae are common in long-term survivors.