Pigmented peripheral nerve sheath tumor of the oral cavity with expression of AP-2 beta and c-RET: a case report

Pigmented peripheral nerve sheath tumor of the oral cavity is a rare lesion and may be difficult to distinguish clinically from true melanocytic tumors. We report a case of pigmented peripheral nerve sheath tumor with a high degree of melanocytic differentiation and describe its histologic and ultrastructural features. Immunohistochemistry and polymerase chain reaction findings support the neural crest origin of the tumor. The clinical course of our case indicates that local recurrence may be a significant problem in pigmented peripheral nerve sheath tumor

In Vitro Light and Scanning Electron Microscopic Study Involving Erbium: YAG Laser Irradiation of Temporomandibular Joint Tissue

Laser-assisted procedures have been applied in arthroscopic surgery with varying degrees of success since the end of the 1970s. The introduction of pulsed holmium and erbium:YAG lasers in the near-infrared range seems to signify a more promising alternative in arthroscopic applications than the CO2 and Nd:YAG lasers that were propagated initially. Since a flexible transmission system for erbium:YAG lasers is still not available, commercialization and thus the clinical utilization of holmium: YAG lasers is more advanced at present. This paper introduces the results of an interdisciplinary research project. With the aid of photomacroscopic examination, light and scanning electron microscopic investigations, changes to temporomandibular joint structures were detected in vitro after irradiation with an erbium:YAG laser system. This investigation revealed that the optimum average energy density and pulse duration for the erbium:YAG laser radiation for the purpose of arthroscopic temperomandibular joint (TMJ) surgery—which means efficient etch rate and minimal adjacent injury—seem to be about 24–42 J/cm2 and 120–240 μsec, respectively

Hydrolyse von Kunststoffabfaellen mit dem Ziel der Wiedergewinnung und Wiederverwendung der Ausgangskomponenten (Rohstoff-Recycling) Schlussbericht. Abschlussdatum: August 1981

TIB: RN 2598 (83-199)+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman