[Uncommon complication of the use of implantable chambers in oncology].

The catheter of an implantable chamber migrated into the pulmonary infundibulum in a patient given chemotherapy for bronchogenic cancer. Current management of such cases is to remove the catheter under pulmonary angiography control using a basket system.

[Value of bony resection-reconstruction by avascular autologous fibular graft in the tropical milieu. Treatment of a giant cavernous hemangioma of the humerus].

In a poorly equipped tropical setting, limb amputation is often considered as the only therapeutic solution for malignant tumors or large benign tumors. However it can be avoided by bone replacement using an avascular autologous fibular graft. This method was used in a young girl from Tchad presenting a giant cavernous hemangioma of the humerus.

[Rare tumor of the posterio-superior mediastinum. Therapeutic approach. Apropos of a case. Review of the literature].

The authors report an exceptional case of giant cell tumour of the third thoracic vertebra revealed by its mediastinal development. Despite intimate involvement of the large mediastinal vessels, a double surgical approach, starting with sternotomy to ensure vascular control then anterolateral thoracotomy, allowed curative resection of this tumor. Treatment was completed by a second neurosurgical operation followed by 5,000 rads of radiotherapy.

Cellulase families revealed by hydrophobic cluster analysis.

The amino acid sequences of 21 beta-glycanases have been compared by hydrophobic cluster analysis. Six families of cellulases have been identified on the basis of primary structure homology: (A) endoglucanases B, C and E of Clostridium thermocellum; endoglucanases of Erwinia chrysanthemi and Bacillus sp.; endoglucanase III of Trichoderma reesei; endoglucanase I of Schizophyllum commune; (B) cellobiohydrolase II of T.