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[Morphofunctional changes in the midgut of the Ixodes females (Acari: Ixodidae) during the immunizing feedings].

The changes of the midgut in the females of the tick species Ixodes persulcatus and I. ricinus during the second and third immunizing feeding on rabbits were studied by the histological technics. The alternation of one generation of the digestive cells of nymphal stage and two generations of the digestive cells of adult stage was observed. The generation of secretory cells is absent. The tick completes feeding and drop off when the last generation of the digestive cells is on the initial activity stages. The amount of the blood consumed is not enough for the rhythmical functioning of the midgut. The feeding of tick is broken on the second phase and full satiation does not take place. It is apparently an effect of the interruption of the blood entrance into the midgut cavity of feeding tick as a probable result of anti-ticks resistance of unnatural hosts.

Animals↗
PubMed1989

Giant cell tumors.

This article presents an overview of the giant cell tumor, its treatment and results of treatment. Some topics included are biopsy, pathology, histology, technical considerations, and recurrence.

Bone Neoplasms↗
PubMed1986

[Choice of the 3d portion of the jejunum for reconstruction of the pharynx in circular pharyngolaryngectomies. Indications and advantages].

Many procedures are used for reconstruction of a pharyngeal gutter after circular pharyngolaryngectomy, interrupter of digestive continuity. The operation chosen was used of third part of jejunum for reconstruction, and its indications and limitations are described. The choice was based on anatomic data from dissection of 100 cadavers and values for different measurements performed (length of transplant, height of mesentery, caliber and length of vessels), and more particularly on constancy and reliability of vascularization of this digestive segment. To these advantages are added bacteriologic, technical, histologic and physiologic reasons. Results are analyzed of 11 operations carried out in the same department, from among a larger group comprising now 45 cases. Postoperative course was usually uncomplicated with rapid restoration of deglutition (a mean of 11.77 days in 9 of the 11 cases). Preoperative radiotherapy is not a contraindication and postoperative radiotherapy should be given routinely as a complement to surgery. It is usually well tolerated and transplant necrosis is not provoked. Nevertheless, the seriousness of this type of lesion is underlined by the high incidence of carcinologic failures, with an elevated risk of local and regional recurrence and of distant metastases.

Aged↗