Surgical approach to parotid pleomorphic adenoma: a 15-year retrospective cohort study.

Our aim was to investigate the clinical outcomes (recurrences, duration of follow-up, and effectiveness) after extracapsular dissection and superficial parotidectomy for pleomorphic adenoma of the parotid gland. We retrospectively studied 261 patients whose adenomas were treated at the Maxillofacial Unit of Magna Graecia University of Catanzaro between January 2003 and December 2015 and had been followed up for at least three years after either extracapsular dissection or superficial parotidectomy. The difference in recurrences and complications between the two techniques were measured by univariate analysis (Fisher's exact test). The level of significance was set at p ≤ 0.05. Of the 261 patients 125 were male (48%) and 136 female (52%), mean (range) age 47 (14-78) years. A total of 210 of the 261 patients had an extracapsular dissection (80%, 101 male and 109 female), and 51 had a superficial parotidectomy (24 male and 27 female). Postoperative complications were recorded in 48 of the 261 patients; complication rate was 10% in the extracapsular dissection group, and a third after superficial parotidectomy. There were more complications in the parotidectomy group (p=0.042). For pleomorphic adenomas located in the superficial portion of the parotid gland, extracapsular dissection is a viable alternative to traditional superficial parotidectomy in the hands of experienced parotid surgeons with regard to clinical outcomes, and it may be superior with regard to cost.

Mandibular bone and soft tissues necrosis caused by an arsenical endodontic preparation treated with piezoelectric device.

This paper describes a case of wide mandibular bone necrosis associated with significant soft tissues injury after using an arsenical endodontic preparation in the right lower second molar for endodontic purpose. Authors debate about the hazardous effects of the arsenic paste and the usefulness of piezosurgery for treatment of this drug related bone necrosis.

[Effect of physico-chemical factors of the soil on the Oribatid population]. / Influencia de factores físico-químicos del suelo sobre poblaciones de Oribátidos.

Orbatid populations present in the ground of four randomly selected patches of land for calf farming underwent ecology during four months. The statistical analysis of results disclosed a highly significative decrease of the population in one out of such patches of land. The physicochemical analysis of earth samples from each patch of land permitted the explanation for the phenomenon on the basis of an increased calcium concentration in the least populated patch of land.

[1st report of an intermediary host of Moniezia sp in Cuba]. / Primer informe de un hospedero intermediario de Moniezia sp. para Cuba.

The determination of an oribatid belonging to the Scheloribates genus as an intermediary host of the Moniezia sp. helminth is reported for the first time in Cuba. Photographs and measurements taken during the infecting larval state of Moniezia (cisticercoid) found are included, such as it is observed because of transparency in the interior of acarus and drew out from the Latter for its better identification.

[Determination of cholinesterase activity in Fasciola hepatica homogenates]. / Determinación de actividad colinesterásica en homogeneizados de Fasciola hepatica.

The cholinesterase activity in Fasciola hepatica homogenates was studied through biological techniques. Results depict that the contractile stimulating action of a constant acetylcholine dose on the isolated rat duodenum is withdrawn when the agent is previously incubated at 37 degrees C during 30 minutes with different dilutions (20%, 40% and 80%) of Fasciola hepatica homogenates. The action is recovered when an anticholinesterase, as neostigmine is previously added to the homogenate. Since these effects are similar to those obtained when different dilutions of human blood serum with a high content of cholinesterase are led to act upon the acetylcholine dose, it is concluded that the acetylcholine inactivation induced by Fasciola hepatica homogenates results from the existence of such enzyme within this parasite.