Intraperitoneal meshes in the repair of abdominal wall defects: comparison of polyester with collagen versus polypropylene with polyglycolic acid.

Objective: To compare the clinical and histological outcomes of the repair of induced abdominal wall defects with Parietex and Optilene Mesh Elastic + Safil in direct contact with abdominal viscera (intraperitoneal position, IPOM).

Methods: Sixteen rabbits were allocated into two groups with 8 animals each, corresponding to evaluation on the 30th and 60th postoperative days. All animals were submitted to two standardized symmetric abdominal wall defects, comprising all muscular layers and the peritoneum, followed by repair through the intraperitoneal placement of two different meshes.

Healing reaction to mammary prostheses covered by textured silicone and silicone foam in rats.

Purpose: To compare the capsular reaction to two different coverings of silicone prosthesis through the biophysical characteristic of adherence and microscopical aspects of the inflammatory reaction and collagen formation.

Methods: Thirty two Wistar rats were used. In the dorsum of each animal a silicone elastomer with a smooth superficies and another coated with texturized silicone (Mentor) was implanted.

Primary epithelial malignant mesothelioma of the pericardium with deciduoid features: cytohistologic and immunohistochemical study.

Malignant mesothelioma with deciduoid features (MMWDF) is a recently characterized morphologic variant of epithelioid malignant mesothelioma, which frequently is misdiagnosed as peritoneal deciduosis or florid mesothelial hyperplasia. We report on the cytological, histological, immunohistochemical, and autopsy findings of a case of MMWDF arising in the pericardium of a 71-yr-old female patient. Cytology showed large, polygonal to round cells with pale to bright, eosinophilic cytoplasm, occasionally showing xantomatous pattern, containing a pleomorphic and vesicular nucleus with a single prominent nucleolus.