Prognostic significance of cytoplasmic p53 overexpression in colorectal cancer. An immunohistochemical analysis.

p53 overexpression was studied by immunohistochemistry in 96 consecutive colorectal cancer patients, subdividing positive specimens according to two staining patterns: cytoplasmic or nuclear. Forty-seven per cent of the cases were p53 positive, a significant correlation being found with Dukes' stage (P = 0.0036). A prevalence of nuclear staining was observed in Dukes' B and cytoplasmic in Dukes' D stages. After 36 months, 23% of the patients had a recurrence, and 45% were p53 positive, all Dukes' C-D stage with cytoplasmic staining. The Kaplan-Meier curve showed a significant correlation between p53 cytoplasmic staining and disease-free survival period (P = 0.002). With respect to disease-free survival, the Cox proportional hazard regression test, comparing p53 positivity with Dukes' stage, showed the latter to be the most significant variable. In our series of patients, advanced Dukes' stage tumours were localised in the right colon, where a higher percentage of p53 positivity (67% versus 40% of the left side), as well as a higher frequency of cytoplasmic staining was observed. In conclusion, from the data obtained, a strong correlation between p53 cytoplasmic staining and patient prognosis is clearly indicated.

Interstitial brachytherapy for pancreatic cancer: report of seven cases treated with 125I and a review of the literature.

Since 1975, seven groups of investigators have reported clinical results of interstitial brachytherapy (IBT) for pancreatic cancer. The reports are comprised of data from 254 patients, 21 of whom died in the postoperative period for an overall operative mortality rate of 8.7%. Operative mortality rate range from 0% to 32% in individual reports. Most patients have been treated with 125I, although 25 patients were treated with 198Au seeds. Most investigators report combining IBT with external beam radiation therapy (EBRT) +/- adjuvant chemotherapy. In general, IBT has been associated with considerable morbidity. Median patient survival time has not exceeded 15 months. This report describes an additional seven patients with locally unresectable pancreatic cancer, without distant metastases, treated primarily with 60 to 100 Gy matched peripheral dose (MPD) by 125I IBT. One patient died postoperatively of a pulmonary embolus. Four of the remaining six patients were also treated with modest doses (10.5 to 30 Gy) of EBRT late in the course of the disease for local tumor progression. One developed a pancreaticocutaneous fistula, and one developed exacerbation of pre-existing diabetes mellitus. The median patient survival time from the date of IBT was 7 months (range: 0 to 21 months). One patient is alive without clinical evidence of cancer 9 months after IBT.

The Italian Registry for Adrenal Cortical Carcinoma: analysis of a multiinstitutional series of 129 patients. The ACC Italian Registry Study Group.

BACKGROUND: Adrenal cortical carcinoma is an uncommon tumor with a poor prognosis. The low incidence of this tumor makes it difficult to achieve reliable data on clinical manifestations, natural history, and the impact of therapies. The purpose of this study was to evaluate such aspects in a large series. METHODS: A retrospective series of 129 cases (55 men and 74 women, mean age of 49 years) was collected from 18 surgical institutions. At the time of diagnosis 45.7% of patients had endocrine symptoms. One hundred twenty-four patients underwent surgery, which was considered curative in 91 cases and palliative in 33. Sixty-three patients had local disease, 48 had regional disease, and 43 had distant metastases. RESULTS: This study confirmed a higher incidence in the 40- to 50-year-old population with a female prevalence; hormonal hyperincretion was more common in women, but it was not caused by advanced disease. The overall 5-year survival rate was 35%. Tumor stage and curative resection affected prognosis significantly. The influence of gender, side, age, and hormonal function has not been confirmed. Adjuvant therapies were ineffective in prolonging survival. Reoperated patients experienced better survival (mean, 41.5 months) than nonreoperated cases (mean, 15.6 months). CONCLUSIONS: The poor prognosis of adrenal cortical carcinoma may be improved by early diagnosis and complete resection. Radical surgery is the sole effective therapy, particularly in early stages. Surgical treatment of recurrence seems to improve survival and should be attempted systematically. Adjuvant therapies obtained contrasting results, and their role should be evaluated in prospective multicentric trials.

Role of reoperation in recurrence of adrenal cortical carcinoma: results from 188 cases collected in the Italian National Registry for Adrenal Cortical Carcinoma.

BACKGROUND: Recurrence of adrenal cortical carcinoma (ACC) after radical surgery is a common finding. Although successful reoperations have been reported with encouraging results, most published experiences are anecdotal and based on few cases. We report the results of surgical treatment for recurrent ACC in a multiinstitutional series. METHODS: One hundred eighty-eight cases of ACC were collected in a national registry. A complete follow-up was obtained in 179 cases. At initial diagnosis 92 patients had local disease (stage I or II). One hundred seventy patients underwent surgical treatment, considered radical in 140; in this group, recurrent disease was observed in 52 cases (37%) after a mean disease-free interval of 21.7 months. RESULTS: Adjuvant chemotherapy was ineffective in ameliorating the prognosis. The mean survival in 20 patients who underwent reoperation was significantly higher (15.85 +/- 14.9 months) than in nonreoperated cases (3.2 +/- 2.9 months). Five-year actuarial survival in reoperated patients is significantly better than in nonreoperated patients (49.7% versus 8.3%, respectively). CONCLUSIONS: Although the prognosis of this tumor is still poor, surgery is the only effective therapy; reoperation allows survival comparable to that observed in patients without recurrent disease. An aggressive strategy for recurrent ACC is advisable until prospective studies demonstrate a real effectiveness for chemotherapy.

Prognosis in intra-abdominal infections. Multivariate analysis on 604 patients.

OBJECTIVES: To identify factors that influence mortality in patients who are affected by intra-abdominal infections (IAIs) and to make a comparison among three different scoring systems: the Acute Physiology and Chronic Health Evaluation (APACHE) II score, the sepsis score of Elebute and Stoner, and the Mannheim peritonitis index. DESIGN: Case series. SETTING: Both primary and referral hospital care. PATIENTS: The hospital records of 604 patients who consecutively underwent emergency operations for unequivocal IAIs, both spontaneous and postoperative, from 1981 to 1993, were retrospectively reviewed. Patients with IAIs that were related to peritoneal dialysis or infected ascites, those patients who were affected by primary peritonitis from a distant site, and those patients who underwent operations for acute appendicitis or acute cholecystitis without peritoneal contamination were excluded from the study. Univariate and multivariate analyses were used to calculate the prognostic significance of the following variables: age (< or = 70 vs > 70 years); sex; type (spontaneous vs postoperative) and extent (localized vs diffuse) of infection; preoperative serum levels of albumin, cholesterol, and hemoglobin; preoperative total lymphocyte count; amount of intraoperative blood loss; presence of preoperative organ impairment; the APACHE II score; the sepsis score of Elebute and Stoner; and the Mannheim peritonitis index. MAIN OUTCOME MEASURE: Death was the outcome variable that was studied. RESULTS: Multivariate logistic regression analysis showed that the APACHE II score, the Mannheim peritonitis index, hypoalbuminemia, hypocholesterolemia, and preoperative organ impairment were independent predictors of death. CONCLUSIONS: Results showed a significant dominance of host-related factors over the type and source of infection on the prognosis of patients with IAIs. Both the APACHE II score and the Mannheim peritonitis index correctly graded IAI severity and were strongly and independently associated with the outcome; however, the latter score has the advantage of being easier to calculate.

Open vs closed treatment of secondary pancreatic infections. A review of 42 cases.

OBJECTIVE: To compare the results of closed treatment (CT) with the results of open treatment (OT) that uses laparostomy and marsupialization of the lesser sac in patients affected by secondary pancreatic infections. DESIGN: Retrospective cohort study. SETTING: Both primary and referral hospital care. PATIENTS: Forty-two patients undergoing emergency operations for unequivocal secondary pancreatic infections (infected pancreatic necrosis [n = 26] and pancreatic abscess [n = 14]) were retrospectively divided into two treatment groups on the basis of the operative treatment: conventional CT (n = 24) (1981 through 1986) and OT by laparostomy and marsupialization of the lesser sac (n = 18) (1987 through 1991). The OT and CT groups were homogeneous regarding demographic characteristics, mean APACHE (Acute Physiology and Chronic Health Evaluation) II score (17.1 +/- 6.0 vs 17.9 +/- 7.2, respectively; P value was not significant), and distribution of patients according to the type of pancreatic infection (infected pancreatic necrosis [13 vs 15, respectively] and pancreatic abscess [five vs nine, respectively]). The use of medical supportive care, including total parenteral nutrition and heavy doses of broad-spectrum antibiotics, was similar in both groups. MAIN OUTCOME MEASURES: Surgical complications; recurrent or persistent sepsis; postoperative death. RESULTS: The incidence of major surgical complications was 55.5% and 8.3% in OT and CT groups, respectively (P = .001). In OT and CT groups, signs of recurrent or persistent sepsis were observed in 5.6% vs 41.7% of the patients, respectively (P = .008): 7.7% vs 46.7% in patients with infected pancreatic necrosis (P = .02) and 0% vs 33.3% in patients with pancreatic abscess (P value was not significant). Overall mortality rates were 22.2% and 28.5% in the OT and CT groups, respectively (P value was not significant). The mortality rates due to recurrent or persistent sepsis in the OT and CT groups were 5.5% and 29.1%, respectively (P = .03). CONCLUSIONS: Although the frequency of major surgical complications after OT is significantly higher than that observed after CT, open drainage by means of laparostomy and marsupialization of the lesser sac controls pancreatic infection better, thus reducing mortality rate due to persistent or recurrent sepsis.

Transfusion timing and postoperative septic complications after gastric cancer surgery: a retrospective study of 179 consecutive patients.

BACKGROUND: Immunosuppression associated with homologous blood transfusion was first observed in renal allograft transplantation. Clinical effects of transfusion-induced immunosuppression in surgical patients have been debated in the literature for more than a decade with contradictory results. OBJECTIVE: To investigate whether homologous blood transfusions significantly affect postoperative septic morbidity and mortality in patients undergoing elective surgery for gastric cancer. DESIGN: Case series. SETTING: Hospitalized care. PATIENTS: The hospital records of 209 patients who underwent elective surgery for gastric cancer at the Department of Surgery of the Hospital del Mar, Autonomous University of Barcelona in Spain, and at the Department of Surgery of the Catholic University of Rome in Italy from April 1984 to December 1990 were reviewed, and 179 patients were included in the study. MAIN OUTCOME MEASURES: The following variables were entered into univariate and multivariate analyses to identify factors potentially affecting postoperative septic morbidity: demographic data, weight loss, preoperative serum albumin level and lymphocyte count, type and duration of operative procedure, amount and timing of blood transfusion, and stage of disease. RESULTS: Univariate analysis showed that a large quantity of blood transfused (> 1500 mL) and transfusion in the postoperative period (group C) were associated with a worse clinical outcome. Postoperative transfusion was an independent predictor of septic morbidity in multivariate analysis. CONCLUSIONS: Despite transfusion-induced immunomodulation, homologous blood transfusion should not be considered a risk factor for postoperative septic morbidity in patients undergoing elective major abdominal surgery. The timing-response relationship between transfusions and septic morbidity in multivariate analysis may be the effect of uncontrolled confounders such as variation of volemia induced by stress response in patients who were developing or had just developed infectious complications.

Treatment of myasthenia gravis. Report on 139 patients.

In the treatment of myasthenia gravis (MG) considerable progress has recently been achieved. Our experience is based on the observation of 139 patients with an average follow-up of 3 years and 4 months. A treatment plan and results are presented. Indications for thymectomy: all cases of MG in adult life, apart from ocular myasthenia without radiological thymoma and without electrophysiological and pharmacological signs of generalization; before puberty only cases with radiological thymoma and severely incapacitating or life-threatening signs. Median sternotomy is preferable for thymoma, the transcervical approach with a sternal split for non-neoplastic thymus. Mediastinal radiotherapy is indicated after removal of an invasive or adhesive thymoma. Indications for corticosteroids: 1) before thymectomy: respiratory weakness; 2) soon after thymectomy: life-threatening signs; 3) later after thymectomy: incapacitating or life-threatening signs; 4) as an alternative to thymectomy: when surgery cannot be performed or it is not indicated. Oral Prednisone was nearly always preferred: alternate-day high single dose (75 to 115 mg) has given good results in most cases even if in some cases a small dose was required in the "off day"; inversely a lower alternate-day or daily dose was often sufficient. Long-term results: following this schedule for adult patients good results were scored in 67% of thymomas, in 94% of hyperplasias, and in 62% of unthymectomized patients: in prepuberal life the few cases of severe MG have all shown a favorable evolution.

Integrated radiosurgical treatment of resectable pancreatic head carcinoma.

Thirty-six patients with pancreatic head carcinoma entered a protocol, but only 20 were suitable for resection and evaluation of long-term survival. They were nine males and 11 females, with a mean age of 64.3 years. Following surgical resection, 10 Gy was delivered to the tumor bed intraoperatively. Postoperative radiotherapy was performed 4-6 weeks after surgery: patients were treated with 50.4 Gy (1.8 Gy/day, 5 days/week) to the tumor and nodal bed. Since 1991, 10 patients have also received preoperative short-course radiotherapy (5 Gy) of the liver and pancreas. Postoperative morbidity was 25%; two postoperative deaths were observed in patients with locally advanced neoplasms, in whom a vascular resection was also performed. Only 14 patients started postoperative radiotherapy, which was interrupted in two cases. At present, 14 patients are dead and four are alive and disease free. The local recurrence rate was 11.1% and distant metastases were observed in 66.7% of cases. The median actuarial survival was 11.9 months, but it was 18.5 months in patients with disease-free resection margins. A significantly better survival was also observed in patients submitted to short-course preoperative radiotherapy. These preliminary results show that intraoperative and perioperative radiotherapy is feasible and may improve local control of disease. Unfortunately, these results are not matched by a significant improvement in survival due to the high incidence of intraabdominal metastases. Thus, new therapeutic modalities, including preoperative radiotherapy (with or without chemotherapy), should be tested.

Influence of anterior subdiaphragmatic vagotomy and TPN on rat feeding behavior.

Total parenteral nutrition (TPN) inhibits food intake and feeding behavior. Whether caloric sensory function of the liver contributes to this food intake and feeding behavior regulation via vagal-afferent innervation was tested after performing anterior hepatic vagotomy or sham operation in rats infused with a TPN solution providing 100% of daily energy needs, given continuously for 4 days. Food intake, meal number, size, duration, meal and intermeal sniffs, and eating activity were measured using an automated computerized rat eater meter (ACREM). TPN infusion resulted in a significant decrease of food intake and feeding indexes in both groups. The vagotomized rats showed a significantly higher food consumption, achieved by greater meal frequency, larger meal size, and longer meal duration. Thus, vagotomized rats consumed more than their controls by eating larger meals more often and of longer duration. Data suggest that anterior hepatic vagotomy interrupts hepatic caloric sensory feedback loop, diminishing inhibitory vagal effects on food intake with TPN, leading to an overall increase in food intake.

Change in meal size, number and duration after neural isolation of liver and with TPN.

The abundant neural connections between the liver and hypothalamus suggest that the liver contributes to spontaneous food intake (SFI) regulation. This hypothesis was tested in rats after total liver denervation (TLD) and infusing TPN. A sham operation (SO) or TLD was performed in Fischer rats, placed in metabolic cages fitted with an Eater Meter to measure SFI, meal number (MN), size (MZ), and duration (MD). Rats had free access to chow and water. After 22 days, a jugular catheter was placed and normal saline continuously infused for 10 days (days 22-32). Then TPN-100, providing 100% of rats daily energy needs, was infused for 3 days (days 32-35). During the post-SO/TLD and postjugular catheterization periods and during TPN-100, SFI was the same in SO controls and TLD group. However, TLD rats had decreased MZ and MD (interpreted as early satiety) and increased MN (interpreted as increased hunger) to maintain the same SFI as control rats. Although total SFI was not influenced by TLD, it significantly affected feeding pattern, suggesting that the neural isolation of the liver from the brain produces altered hypothalamic regulation of not only the onset of feeding, but also satiety.

Epidermal growth factor levels in human breast cyst fluid.

Epidermal growth factor (EGF) seems to modulate the in vitro and in vivo growth of normal and neoplastic breast cells. We determined, by a radio-receptor assay, EGF levels in cyst fluid and in plasma of patients with gross cystic disease of the breast. The mean levels of EGF were lower in plasma than in breast cyst fluid (BCF) (p less than 0.001). In BCF of apocrine cysts we found higher EGF levels than in flattened cysts (p less than 0.001). The EGF content of apocrine BCF seems to be under sex steroid hormone control, being higher in reproductive age than in post menopause (p less than 0.05). Since it has been reported that patients with apocrine cysts are at a greater risk of developing breast cancer, we hypothesize that the high EGF concentration in apocrine BCF may play a role in the autocrine breast cyst epithelium growth control and neoplastic transformation.

Avoiding early postoperative complications in liver surgery. A multivariate analysis of 254 patients consecutively observed.

BACKGROUND: The number of hepatic resections for benign and malignant lesions has constantly increased over the past 20 years, as a consequence, surgical experience acquired over the past few years has decreased post-operative morbidity and mortality rates. AIMS: Analysing the relation between potential preoperative risk factors and the occurrence of severe post-operative complications, an attempt is made to identify the variables determining surgical risk in elective hepatic surgery both in normal and cirrhotic liver. PATIENTS AND METHODS: The hospital records of 254 patients who underwent elective liver surgical procedures for hepatic lesions in our department, between 1984 and 1999, were reviewed. The following variables were entered into univariate and multivariate analysis: age, sex, nature of liver lesion (benign or malignant), presence of cirrhosis or cholestasis, synchronous resection of other organs, disorders of blood coagulation, intraoperative blood requirement, the extent of surgical procedures and Pringle's manoeuvre. RESULTS AND CONCLUSIONS: The multivariate analysis of the 254 surgical operations on the liver indicates that the most powerful independent predictors favouring a serious adverse effect includes intra-operative blood transfusions, advanced age and cirrhosis. Scrupulous preoperative clinical evaluation and expert surgical skills minimize intra-operative bleeding and proved to be the most significant factors influencing morbidity and mortality rates.

Preoperative parenteral nutrition in the high risk surgical patient.

In order to assess the significance of malnutrition in determining surgical complications and the possibility of their reduction by preoperative nutritional support (PNS), a randomized controlled trial is being performed at our institution. The results relative to 100 patients who underwent major surgery for gastrointestinal disease, are presented here. In the treatment group 49 patients received 30 kcal/kg/day and 200 mg/kg/day of nitrogen for at least 7 days in the immediate preoperative period (nine patients were excluded from this group due to early surgery--seven cases; or refusal to accept PNS--two cases. Data analysis with their inclusion or exclusion showed similar results.) Fifty-one patients constituted the control group. The observed septic complication rate was, respectively, 30 and 35.3% (p:NS). When the analysis was restricted to the patients with abnormal instant nutritional assessment (INA), as defined by Seltzer et al (serum albumin less than 3.5 g/dl and/or total lymphocyte count less than 1500 cells/mm3), a statistically significant difference was observed in the incidence of sepsis between the two subgroups (21% vs 53.3%, p less than 0.05). Analogous results were obtained from the patients who underwent gastrectomy for gastric cancer: 16.7% of septic complications in the malnourished treated patients and 100% in the malnourished control ones (p less than 0.05). The occurrence of serious sepsis (sepsis score greater than or equal to 10, according to the scoring system developed by Elebute and Stoner) in the malnourished subgroups was 5.2% and 26.7%, respectively, (p = 0.09). The postoperative mortality rate was not significantly changed by the PNS (reduction from 3.9% to 2.5%, p:NS).(ABSTRACT TRUNCATED AT 250 WORDS)

Insulin adsorption to three-liter ethylen vinyl acetate bags during 24-hour infusion.

Insulin adsorption to ethylen vinyl acetate, 3-liter bags injected with 10 insulin units, during 24-hr infusion has been studied. Three different infusions systems (A, B, and C) were tested and eight bags for each system were used. An elevated insulin adsorption resulted in each system. The maximal insulin recovery, expressed as percentage of the original theoretical 3333 microIU/ml insulin concentration, was 19.54% (at time 6), 20.93% (at time 4), and 16.95% (at time 22) for system A, B, and C, respectively. "Dismissed insulin amount" after 24-hr infusion was 1590 +/- 279.5 microIU, 1505.8 +/- 430.5 microIU, and 1253.3 +/- 369.8 microIU for system A, B, and C, respectively. Comparison of insulin concentration values at different times revealed significant differences only at time 18 (if compared with times 0,2.4,6,8,12,14,16) ant at time 20 (if compared with time 4,6,8,10) for system A, and at time 4 (if compared with time 12,14,16,18,20,22,24) for system B. We conclude that a constant but low insulin delivery can be achieved using 3-liter EVA systems and a 24-hr infusion.

Structured versus long-chain triglycerides: a safety, tolerance, and efficacy randomized study in colorectal surgical patients.

BACKGROUND: After trauma or surgery, researchers have suggested that medium-chain triglycerides have metabolic advantages, although they are toxic in large doses. To try to reduce this potential toxicity, structured lipids, which provide a higher oxidation rate, faster clearance from blood, improved nitrogen balance, and less accumulation in the reticuloendothelial system, could be used. Therefore, we evaluated, through a blind randomized study, the safety, tolerance, and efficacy of structured triglycerides, compared with long-chain triglycerides (LCT), in patients undergoing colorectal surgery. METHODS: Nineteen patients were randomized to receive long-chain or structured triglycerides as a lipid source. They received the same amount of calories (27.2/kg/d), glucose (4 g/kg/d), protein (0.2 g/kg/d), and lipids (11.2 kcal/kg/d). Patients were evaluated during and after the treatment for clinical and laboratory variables, daily and cumulative nitrogen balance, urinary excretion of 3-methyl-histidine, and urinary 3-methylhistidine/creatinine ratio. RESULTS: No adverse effect that required the interruption of the treatment was observed. Triglyceride levels and clinical and laboratory variables were similar in the two groups. A predominantly positive nitrogen balance was observed from day 2 until day 5 in the LCT group and from day 1 until day 4 in the structured triglycerides group. The cumulative nitrogen balance (in grams) for days 1 to 3 was 9.7+/-5.2 in the experimental group and 4.4+/-11.8 in the control group (p = .2). For days 1 to 5 it was 10.7+/-10.5 and 6.5+/-17.9 (p = .05), respectively. The excretion of 3-methylhistidine was higher in the control group but decreased in the following days and was similar to the experimental group on day 5. CONCLUSIONS: This study represents the first report in which structured triglycerides are administered in postoperative patients to evaluate safety, tolerance, and efficacy. It suggests that Fe73403 is safe, well tolerated, and efficacious in terms of nitrogen balance when compared with LCT emulsion.

Primary hyperparathyroidism. Our experience.

We report our experience in the clinical presentation and management of 12 patients with primary hyperparathyroidism, who underwent successful surgery. Comparing our results with those previously reported in the literature, we have attempted to correlate the kind of parathyroid lesion, the magnitude of hypercalcemia and PTH increase, and clinical symptoms. Often these relationships are intriguing; we have tried to classify our patients describing four groups, according to clinical and humoral findings: 1) patients with very mild hypercalcemia and aspecific symptoms; 2) patients with a finding of recurrent hypercalcemia and prevalent renal involvement; 3) patients with severe hypercalcemia, plurisystemic involvement and general decay; 4) patients with medical emergencies. Finally, some considerations on rare histological pictures (hyperfunctioning carcinoma, oxyphil cell adenoma) are reported.

Risk factors in relation to postoperative complications and mortality after total gastrectomy in aged patients.

To clarify the risk factors contributing to postoperative complications in elderly patients undergoing total gastrectomy, 84 patients with primary gastric cancer were evaluated. Twenty-seven patients were older than 65 years of age; they had much more preoperative cardiac (P = 0.00003), respiratory (P = 0.0008), and multiorgan impairment (P = 0.009) than did the control group (age less than 65 yrs). Although overall morbidities (44.4% vs. 19.2%; P = 0.01) and overall septic complication rates (33.3% vs. 12.2%; P = 0.02) were higher in aged patients, no significant differences between the two groups were found in the incidence of major surgical complications (18.5% in aged patients vs. 10.5% in control groups; P = NS), serious septic (sepsis score greater than 10) complications (18.5% vs. 7.0%; P = NS) and hospital mortalities (11.1% vs. 3.5%; P = NS). In older patients the occurrence of multiorgan impairment and malnutrition was significantly related to postoperative complication rates. These results suggest that the degree of organ impairment rather than age is predictive of postoperative difficulty and should be used in assessing preoperative risk.

Palliative surgery for far-advanced gastric cancer: a retrospective study on 305 consecutive patients.

Few reports of the Western countries have investigated the value of palliative surgery for stomach cancer. The aim of this study was to evaluate the results of palliative surgery in a large series of patients affected by gastric carcinoma, consecutively treated by the same surgical team. The hospital records of 305 patients affected by gastric cancer who did not undergo surgical treatment or who underwent a palliative surgical procedure at our unit between 1981 and 1995 were reviewed. Univariate and multivariate analyses were used to calculate the 5-year survival probabilities with respect to the following variables: demographic data, tumor location and gross appearance, spread of the disease, histological type according to P. Lauren, and type of treatment. Multivariate logistic regression analysis showed that resectional surgery and tumor spread limited to local sites were independently associated with better survival. The study indicates that even though there are host-related factors that govern survival in far-advanced stomach cancer, the type of surgery can have a significant effect on prognosis; resectional surgery should be undertaken whenever possible in such patients.

Single dose imipenem-cilastatin compared with three doses of cefuroxime and metronidazole as prophylaxis in elective colorectal surgery: a prospective randomized study.

A prospective randomized study was performed with 61 patients undergoing elective surgery for colorectal cancer, to evaluate the prophylactic effect of two different parenteral antibiotic regimens. All patients were randomly allocated into two groups, comparable in age, sex, nutritional status and operative procedures. The patients in Group A (n. 31) received 1 g i.v. of imipenem-cilastatin at induction of anesthesia. Patients in Group B (n. 30) were given cefuroxime (1.5 g i.v.) plus metronidazole (0.5 g i.v.) at the time of anesthesia and two other administrations of the combined antibiotics (cefuroxime 0.75 g plus metronidazole 0.5 g i.v.) every 8 hours. The severity of sepsis was evaluated according to the scoring system proposed by Elebute and Stoner. No significant differences were found in terms of the rate of surgical infections: 9% in Group A and 16% in Group B. Infections not of surgical origin were found only in Group B (10.4%). These data suggest that a single dose of intravenous imipenem-cilastatin appears to be as effective as three doses of cefuroxime and metronidazole as prophylaxis against infection in elective colorectal surgery.