OBJETIVOS: Avaliar a isquemia parcial ou total, através da ligadura com fio inabsorvível dos vasos do mesoapêndice do apêndice vermiforme de coelhos, bem como a obstrução mecânica, através da ligadura com fio inabsorvível da base do apêndice vermiforme, a 1 cm do ceco. Avaliar a histologia do apêndice ( normal e acometido ). Estudar a flora bacteriana residente no apêndice vermiforme ( normal e acometido ) e do exsudato peritoneal. MÉTODOS: Foram utilizados 72 coelhos ( "Oryctogalus cuniculos" ), machos da linhagem Nova Zelândia, com peso médio de 3,000 gramas. Foram divididos em grupos: piloto ( A ), flora bacteriana ( B ), controle ( H ) e experimento ( C, D, E, F e G ) com períodos de observação de 96 horas e 192 horas. Fez-se a ligadura dos vasos do mesoapêndice, com fio inabsorvível nos grupos ( D, E, F e G ) e da base do apêndice vermiforme a 1 cm do ceco, no grupo ( C ) . No grupo experimento (D,E,F e G ) foi praticado o modelo isquêmico. No grupo experimento ( C ) foi realizada a obstrução mecânica e no grupo controle ( H ) foi feita somente a simulação da cirurgia. RESULTADOS: No grupo controle ( H ), não ocorreu apendicite aguda. No grupo experimento ( C,D,E,F, e G ) ocorreu apendicite aguda. CONCLUSÃO: O procedimento utilizado causa apendicite aguda com alterações anatomopatológicas distintas. A bactéria residente encontrada na flora fisiológica do suco entérico do apêndice vermiforme e no exsudato peritoneal foi a Escherichia coli.

PURPOSE: To evaluate partial or total ischemia, through ligature with an unabsorbed thread of vessels from the vermiform appendix of rabbits, as well as the mechanical obstruction, through ligature with an unabsorbed thread at the basis of the vermiform appendix, at 1 cm from the cecum, of the acute appendicitis disease. To evaluate the histology of the appendix ( normal and affected ). To study the bacterium flora resident in the vermiform appendix (normal and affected) and the exudates peritonitis. METHODS: Seventy- two male rabbits ( Oryctogalus cuniculus ), from New Zealand lineage were used, weighing approximately 3,000 grams. The animals were divided into: pilot ( A ), bacterium flora ( B ), control ( H ) and experimental ( C, D, E, F and G ) groups, and were observed in periods of 96 and 192 hours. It was done the ligature with an unabsorbed thread of vessels from the meso appendix, and the base of the appendix within 1 cm from the cecal. In the ( C ) experimental group, the mechanical obstruction was carried out. In the (D, E, F and G) experimental groups, the ischemic model was used, and in the ( H ) control group, only the surgical simulation was done. RESULTS: In the control group ( H ), the acute appendicitis didn't happen. In the experimental group ( C, D, E, F and G ) the acute appendicitis happened. CONCLUSION: The method used causes acute appendicitis with distinct anatomopathological alterations. The main bacteria found at the physiological flora of the enteric juice from the vermiform appendix and at the exudates peritonitis was the Escherichia coli.

The authors present three cases report of appendicular diverticulum with associated diverticulitis, one of them asymptomatic. The clinical distinction between acute apendicitis and apendical diverticulitis is very difficult, the later usually with earlier suppuration. The are no consensus regarding preventive surgery for apendical diverticulitis. It is possible that incidence of apendicular diverticulum depends on careful anatomopathological exams.

OBJETIVO: Avaliar a isquemia parcial ou total do apêndice vermiforme de coelhos, através da ligadura com fio inabsorvível dos vasos do meso apêndice bem como a obstrução mecânica, através da ligadura com fio inabsorvível da base do apêndice a 1 cm do ceco, na patogênese da apendicite aguda. Avaliar a histologia do apêndice (normal e acometido). Estudar a flora bacteriana residente no apêndice vermiforme (normal e acometido) e do exsudato peritoneal. MÉTODO: Foram utilizados 72 coelhos (Oryctogalus cuniculos), machos, da linhagem Nova Zelândia, com peso médio de 3.000 gramas. Foram divididos em grupos: piloto (A), flora bacteriana (B), controle (H) e experimento (C, D, E, F e G) com períodos de observação de 96 horas e 192 horas. Fez-se a ligadura dos vasos do meso apêndice com fio inabsorvível nos grupos (D, E, F e G) e da base do apêndice vermiforme a 1 cm do ceco, no grupo (C). No grupo experimento (D, E, F e G) foi praticado o modelo isquêmico. No grupo experimento (C) foi realizada a obstrução mecânica e no grupo controle (H) foi feita somente a simulação da cirurgia. RESULTADOS: Ocorreu apendicite aguda no grupo experimento (C,D,E,F, e G). CONCLUSÕES: O método utilizado causa apendicite aguda com alterações anatomopatológicas distintas. A bactéria residente encontrada na flora fisiológica do suco entérico do apêndice vermiforme e no exsudato peritoneal foi Escherichia coli.

BACKGROUND: To evaluate partial or total ischemia, through ligature with an unabsorbed thread of vessels from the vermiform appendix of rabbits, as well as the mechanical obstruction, through ligature with an unabsorbed thread at the basis of the vermiform appendix, at 1 cm from the cecum, in the pathogenesis of acute appendicitis. To evaluate the histology of the appendix (normal and affected). To study the resident bacterium flora in the appendix (normal and affected) and the peritonitis exudate. METHODS: Seventy- two male rabbits (Oryctogalus cuniculus), from New Zealand lineage were used, weighting approximately 3.000 grams. The animals were divided into: pilot (A), bacterium flora (B), control (H) and experiment (C,D, E, F and G) groups, and were observed in periods of 96 hours and 192 hours. A ligature with an unabsorbed thread of vessels from the meso appendix was performed in group D,E,F,G (ischemic model), and of the base of the appendix, 1 cm from the cecum, in group C (mechanical obstruction). In the (H) control group only the surgical simulation was performed. RESULTS: Acute appendicitis was detected in experiment group (C, D, E, F and G). CONCLUSION: The method used causes acute appendicitis with distinct anatomopathological alterations. The main bacteria found in the physiological flora of the enteric juice of the vermiform appendix and in the exudates peritonitis was Escherichia coli.

Primary adenocarcinoma of the duodenum is an extremely rare disease, and represents only 0.35% of all gastrointestinal malignancies. Early detection of the disease may be difficult because of the absence of pathognomonic symptoms. The authors relate one case of a adenocarcinoma of the duodenum in a 61-year-old white man with a history of abdominal pain for a six-month period, associated with postprandial fullness, vomiting and weight loss. Contrasted x-ray and computerized tomography showed a tumor in the fourth segment of the duodenum, with partial obstruction of the lumen. Histological study revealed a moderate differentiated adenocarcinoma. Treatment consisted of resection of the fourth portion of duodenum. The authors comment on the most important aspects of this pathology.