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Prevalence of fosfomycin resistance in E. coli clinical isolates from UTIs remains very low. Our hypothesis was that fosfomycin resistance may be associated with a biological cost. Three groups of strains of E. coli belonging to the B2 phylogenetic group were used: clinical wild-type (WT) isolates, clinical multidrug-resistant isolates and in vitro fosfomycin-resistant derivatives from the uropathogen clinical strain E. coli CFT073. In each group fosfomycin-susceptible and -resistant isolates were compared. In vitro, we found a significantly decreased growth rate for fosfomycin-resistant strains as compared with susceptible strains in the WT group. In a murine model of ascending UTI, there was a significant reduction in infection rates with fosfomycin-resistant isolates as compared with susceptible ones, in all 3 study groups, ranging from 28 to 39% (P<0.03). All fosfomycin-susceptible clinical strains were virulent in vivo (13/13), while fosfomycin-resistant clinical strains were either virulent (2/7) or non-virulent (5/7) (P<0.002). This difference was not explained by the number of virulence factors or pathogenicity-associated islands. In conclusion, fosfomycin resistance appears to carry some biological cost in E. coli, which may explain in part the apparent paradox of the low prevalence of fosfomycin resistance despite a high rate of spontaneous mutants.

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Mucoceles of the appendix and associated pseudomyxoma peritonei are a heterogeneous group comprising various histopathologic lesions with differing prognoses. Between 1983 and 1990, we treated eight patients with appendiceal mucocele, three cystadenomas and five cystadenocarcinomas, three of which had accompanying pseudomyxoma peritonei. All patients were more than 50 years of age. Women outnumbered men by seven to one. Preoperative diagnosis was acute appendicitis or appendiceal abscess in all instances of mucocele unaccompanied by pseudomyxoma peritonei. Ultrasound of the abdomen, together with paracentesis, diagnosed pseudomyxoma peritonei in two of three patients. Elevated carcinoembryonic antigen levels were found in six of the eight patients and monitoring of this parameter was useful in the early detection of the two recurrences observed. The three patients with cystadenomas remain free of disease after appendectomy. Of the five patients treated for cystadenocarcinoma by right colectomy, two underwent reoperation after recurrence of disease. One patient died 41 months later of intestinal obstruction caused by pseudomyxoma peritonei. Pseudomyxoma peritonei significantly decreases survival of patients with appendiceal mucocele. In these patients, aggressive initial surgical management, repeated if need be, is indicated.

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To establish the incidence of cholelithiasis after total gastrectomy, patients operated on between 1979 and 1985 were reviewed. The study group consisted of 30 patients, all free of gallstones at the time of their gastrectomy. The median age of the patients was 56 years, the average follow-up 40 months. Cholelithiasis developed in 47 per cent of patients (14/30) and always within 2 years of total gastrectomy. The incidence of cholelithiasis was not related significantly to the sex or age of the patients. Morbidity from cholelithiasis was not negligible. Three of the fourteen patients presenting with gallstones required medical treatment in hospital and later came to cholecystectomy because of specific biliary symptoms. Cholelithiasis appears to be a significant complication after total gastrectomy. It may be related to the vagotomy which is performed at the time of gastrectomy.

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We reviewed the results of stapled circular (EEA) and linear (TA 30 or 55) anastomoses in a prospective study of 40 total gastrectomies for cancer, using an interposed jejunal limb (Henley technique). There were 63 circular anastomoses: 40 esophago-jejunal, 20 jejuno-duodenal and 3 jejuno-jejunal anastomoses. Forty patients were submitted to 41 linear stapled closures of the jejunal stump. Technical failure rate with stapled anastomoses was 5% (3 out of 63). Incidence of anastomotic leak was 6.3% for all the circular stapled anastomoses tried and 5% if the 3 technical failures were excluded. Anastomotic leakage is more often associated to splenopancreatectomy. One patient (1% of all the anastomoses) presented gastro-intestinal bleeding, related to the suture line. A conservative treatment was carried out successfully. The mean follow-up time of the surviving patients was 27 +/- 20 months: there was a 5.5% rate of late anastomotic stenosis; all the patients were cured by esophageal dilations. Late anastomotic stenosis is directly related to associated cobalt therapy. Analysis of an older retrospective series of 41 hand-sutured total gastrectomies allowed a comparison to be made between stapled and sutured anastomoses in total gastrectomy for cancer.

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Preoperative localizing technics of a parathyroid tumour. The authors present a limited experience about preoperative localizing technics of a parathyroid tumour. Oesophagography and selenomethionine 75 scintigraphy were not useful. Ultrasonography and computed tomography localised 50% of the tumours. Selective thyroïd venous catheterization and radioimmunoassay are correctly predictive in 87,5% of the studied cases. The interest, morbidity and results of these different technics are discussed.

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