G S Drăgoi | PubMed Health

PubMed2006

Ectopic osteogenesis in the rectus sheath.

Although was published many cases of ectopic osteogenesis of traumatic, neurogenic cause or hereditable form, the etiology of ectopic osteogenesis remaining unknown. We present ectopic osteogenesis in the rectus abdominal sheath. The study material was represented from fragments of ectopic bones discovered in rectus sheath of four patients suffering iterative surgical abdominal interventions. The pieces of ectopic bone were decalcified and then were made to the standard techniques (paraffin inclusion, general techniques dyeing). The process of ectopic osteogenesis was analyzed through microscopically study to seriated sections of discovered piece, finding the presence of the hematopoesis foci. We conclude that is important identifying and characterizing the osteoinductor agents because these allowed the study of osteogenesis to the cellular level and make an estimation of the abnormally bone developing mechanisms. A possible osteoinductor factor has been considerate the non-absorbable wound closure material.

Aged↗

PubMed2006

Contributions to the micro-anatomical evaluation of the ratio between the muscular tunic structures of the oesophagus. Biomechanical, anatomic and clinical implications.

The aim of our research is to make a microanatomical evaluation of the ratios of the structural elements of the oesophagus muscular tunic and suggest a new perspective in the general knowledge about this tubular organ. The visualisation of the structural elements was done using classical microanatomical methods Hematoxylin-Eosin for general orientation, Van Gieson for picrofuxinophile collagen fibers and Gömöri for reticuline fibers. The neurofilaments were identified using silver impregnation on Cajal block. The examination of the sections was made with the Nikon Eclipse 600 photomicroscope. The images were taken and processed using a computer with LuciaNet licensed Microsoft. The co-existence in the architecture of the oesophagus of two microcinematic systems structurally divergent, but functionally convergent represents microanatomical arguments for the nomination of a new type of muscles--the oesophageal muscle--anatomo-functionally different from the skeletal striate muscle, from the smooth visceral muscle, from the cardiac muscle or from the embryonic type muscle of the excitoconductor system. The extra cellular matrix of the muscular tunic of the oesophagus contributes to the organization of the endo- and peri-misium, as well as to the three structures involved in the biomechanics of the oesophageal muscle: the connective-vascular septa, the microtendons that have in their structure receptors of the peristaltic reflex and, finally, the lamina propria myenterica strewed with numerous neuronal structures. The co-existence of the stereo-distribution of the monostructured fascicles (skeletal muscular fibers or smooth muscular cells) with bistructured fascicles (skeletal-smooth) gives the oesophagus a heterogeneous architecture. Lamina propria myenterica, which realizes the border between the circular and longitudinal strata, contains two neuronal structures of its own, but anatomically inserted the neural myenteric plexus which is equivalent to the Auerbach plexus and the neuroganglion of the myenteric plexus, equivalent to the visceral neuroganglion Cajal-Retzius.

Adult↗