Retroperitoneal ganglioneuroma in an adult patient: a case report and literature review of the last decade.

Ganglioneuromas arise from the neural crest and are highly differentiated and benign. The case of a 43-year-old female who presented with a 6.5 cm primary extra-adrenal retroperitoneal ganglioneuroma (RGN) is presented, and the relevant English literature from the last decade is reviewed.

The canal system in the diaphysial compacta of the femur in some mammals.

The Haversian canal system in the diaphysial compacta of the femur in 4 mammalian species (dog, pig, bovine, horse) was studied on the decalcified bone using a method developed by the authors. In the microscopic studies we found that in all species the network aspects vary with the depth of the compacta layer. In all layers, there is a background of longitudinal canals with more or less regular trajectories describing large curves.

Some aspects of the system of Haversian canals in the diaphysary compact bone in man.

The general aspect of the network of Haversian canals was studied on tangential and radial sections from the diaphysary compact bone of the human long bones. The network-like aspect was much varied even in the same bone and at the same level from which the samples were obtained. No obvious differences were found between the studied bones or between the two limbs.

Comparative aspects of the density and diameter of Haversian canals in the diaphyseal compact bone of man and dog.

By using an original method, the authors injected the system of canals and then studied microscopically their network in the femoral diaphysis of man and dog. In the human bone, the density varies between 1.09 and 2.

Some interrelations between the density of the Haversian canals and the area occupied by these in the diaphyseal compact bone in man.

The authors studied the ratio between the density of the Haversian canals and the area occupied by these in the diaphyseal cortex of the main long bones in man. The interrelation was estimated by means of the correlation coefficient, which varies between -0.135 for the fibula and -0.