[Endoscopic surgery of nasopharyngeal angiofibroma by double embolization].

Juvenile nasopharyngeal angiofibroma is a source of controversy with respect to therapy because of the many therapeutic modalities that exist, such as classic surgical techniques and newer techniques like nasal endoscopic surgery, which have emerged with the advent of new and better diagnostic techniques. Endoscopic surgery is less aggressive and produces less morbidity, but its use often depends on the size and extension of the tumor. A clinical case is presented with the subsequent diagnostic steps and surgical treatment.

[Cellular viability of cryopreserved cartilage grafts].

Transplantation of preserved cartilage has an important role in reconstructive surgery. Opinions vary with regard to the performance of cryopreserved cartilage. We studied the functional state of chondrocytes after cryopreservation.

Determination of viability of cryopreserved cartilage grafts.

Although transplantation of preserved cartilage has assumed a role of great importance in reconstructive surgery, there are many divergent and contradictory opinions with regard to the outcome of cryopreserved cartilage. This study was formulated to assess the functional state of chondrocytes after cryopreservation. Freeze injury and survival were studied using the trypan blue dye exclusion test, functional assay for cell adhesion and transmission electron microscopy.