Unusual tumours of the lung.

Unusual lung tumors are not simply pathological curiosities. They demonstrate features of major significance in diagnosis, treatment, and prognosis. Six of these tumours are discussed: (1) Carcinosarcoma is rarely found in the lung.

Laceration of superior vena cava due to blunt trauma: successful surgical management.

Injuries of the superior vena cava are usually due to penetrating trauma. Injuries due to blunt trauma are rare. The diagnosis of superior vena caval injuries, which may be intrapericardial or extrapericardial, is usually made retrospectively.

Development of a paracorporeal left ventricular assist pump system: an experimental study.

Experiments were designed to compare the hemodynamic performance and metabolic effect of a paracorporeal left ventricular assist pump system (PLVAPS) with those of intra-aortic balloon pumping (IABP) in a series of 35 dogs with and without myocardial infarction (MI). The animals were subjected to a three-hour period of pumping seven days after implantation of catheters and loose left anterior descending coronary (LAD) snares. MI was produced by closed-chest snaring of the LAD 13 hours before the onset of pumping.