Gastric schwannoma as a rare differential diagnosis of pleural effusion.

We report a case of solitary gastric schwannoma that initially manifested with recurrent left pleural effusion caused by an inflammatory reaction. A 75-year-old female was primarily admitted with progressive dyspnoea and left sided effusion. History as well as clinical examination, gastroscopy, computed tomography (CT) and transabdominal ultrasound of the abdomen suggested the diagnosis of a benign tumour of the stomach.

Computer copings for partial coverage.

Partial coverage posterior tooth preparations are very complex surfaces for computer surface digitization, computer design, and manufacture of ceramic copings. The aim of this study was therefore to determine whether the Computer Integrated Crown Reconstruction (Cicero) system was compatible with a proposed partial coverage preparation design and capable of producing ceramic copings. Posterior teeth were prepared for partial coverage copings with deep gingival chamfers in the proximal boxes and around the functional cusps (buccal of mandibular and lingual of maxillary posterior teeth).

Energy-linked mitochondrial pyridine nucleotide transhydrogenase of adult Hymenolepis diminuta.

Employing "phosphorylating" submitochondrial particles as the source of pyridine nucleotide transhydrogenase, the occurrence of an energy-linked NADH----NADP+ transhydrogenation in the adult cestode Hymenolepis diminuta was demonstrated. The isolated particles displayed rotenone-sensitive NADH utilization and the reversible transhydrogenase, with the NADPH----NAD+ transhydrogenation being more prominent. Although not inhibiting the NADPH----NAD+ reaction, rotenone, but not oligomycin, inhibited the catalysis of NADH----NADP+ transhydrogenation.

Mitochondrial hydrogen peroxide formation and the fumarate reductase of Hymenolepis diminuta.

The catalysis of hydrogen peroxide accumulation by the mitochondrial, membrane-associated NADH oxidase and less active succinoxidase of adult Hymenolepis diminuta was confirmed. NADH-dependent peroxide formation by isolated mitochondrial membranes occurred at about half the coincident rates of NADH and oxygen utilization, whereas succinate-dependent peroxide formation accounted for approximately 40% of the oxygen consumed. These findings, coupled with evaluations of the oxidases, indicated that both systems use in common 2 mechanisms for oxygen reduction, 1 of which is peroxide-forming.

[Revision operations following vagotomy].

Recurrent duodenal ulceration after highly selective vagotomy is best managed by antral gastric resection and gastroduodenostomy (BI). In cases of gastral localisation of the recurrent ulcer and in cases with high postoperative acidity a 2/3 partial gastrectomy (BI) should be performed. Revagotomy after highly selective vagotomy is not feasable in most cases.