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Biomedical subjects

D F D'Amico

Publications and source records attributed to D F D'Amico.

At least 19 recordsLinked to original sources
PubMed2005

Cystadenoma and laparoscopic surgery for hepatic cystic disease: a need for laparotomy?

BACKGROUND: This study aimed to evaluate the incidence of cystadenoma diagnosis in a series of laparoscopic treatments for nonparasitic liver cysts, as well as its management. METHODS: From 1996 to 2004, 26 patients with a nonparasitic cyst of the liver were selected for laparoscopic liver surgery. Solitary nonparasitic liver cysts were, whenever feasible, completely enucleated. RESULTS: In four patients, the histopathologic examination showed a cystadenoma. Three patients with 13, 9, and 12-cm cysts, respectively, had undergone complete enucleation of the lesion, with no evidence of recurrence in the follow-up visit. One patient with multicystic liver experienced a recurrence and required an open hepatic resection. CONCLUSIONS: When a complete laparoscopic enucleation of the cyst can be ensured, a strict follow-up assessment should be considered as the definitive treatment, with surgical intervention demanded only in the case of recurrence or high suspicion for malignancy.

Adult↗
PubMed2005

Laser photoablation of colorectal adenomas: a 12-year experience.

BACKGROUND: We analyze laser photoablation as an alternative treatment of large sessile polyps in inoperable patients. METHODS: Ninety-four colorectal polyps (mean diameter 3.09 +/- 2.7 cm, range 1-15 cm) were treated using high-energy lasers (Nd:YAG and diode). Grade of dysplasia was low in 51, high in 35, with focally invasive cancer in eight. RESULTS: After 405 laser sessions (4.3 per polyp) five procedure-related complications were observed: two strictures, two bleedings, and one perforation. The last needed a surgical resection; the others were successfully treated by endoscopic therapy. Fifty-seven polyps (61%) were completely eradicated and the growth was controlled in all but two (98%). No degeneration was found after 28-month follow-up of treated adenomas with low- or high-grade dysplasia. Outcome of treatment was dependent on the dimension and grade of the dysplasia (p < 0.05), but not on the polyps' position (rectum or colon). Relief of rectal bleeding was obtained in 90%, of mucus discharge in 77%, and of tenesmus in 100% of cases. CONCLUSIONS: Laser photoablation of colonic adenomas can be considered a valid procedure not only to relieve symptoms, but also to control the risk of degeneration in patients unfit for surgery or when surgical treatment is considered excessively invalidating.

Adenoma↗
PubMed2004

Psoas abscess: a rare complication of Crohn's disease.

UNLABELLED: Psoas abscess is a rare complication of Crohn's disease. METHODS AND MATERIALS: We evaluated the incidence of psoas abscess on 312 patients with Crohn's disease, seen at our institution between 1992-2001. RESULTS: We encountered three cases of psoas abscess (0.9%). One patient was managed with ileocolic resection and immediate anastomosis, while in two patients a percutaneous drainage was first performed and then, after 12 days of total parenteral nutrition, a resection of the diseased bowel with immediate reconstruction was carried out. CONCLUSIONS: A correction of the nutritional deficiencies is mandatory. Percutaneous computed-tomography guided drainage of the abscess with intestinal resection with immediate anastomosis, performed after a parenteral hyperalimentation, should be the method of choice in the management of such patients.

Adolescent↗
PubMed2004

An experimental swine model of small bowel cross transplantation.

AIM: In this study we evaluated the possibility of performing a cross small bowel transplantation (CrSBTx) in which, at the same time, 2 pigs were both donors and later recipients of intestinal grafts. The hemodynamic and metabolic impact of this original transplantation model on the animals was determined. METHODS: Ten large White adult female pigs underwent a 2 stage procedure. The principal intraoperative hemodynamic and metabolic parameters were measured at different times during the operation. In the 3 days that followed the operation, renal function, liver and pancreatic damage were investigated. RESULTS: Our surgical model permits us to keep excellent hemodynamic and metabolic stability with low mortality. CONCLUSION: The need of half of animals with respect to conventional models represents an ethical and economic advantage of CrSBTx and we propose it for intestinal transplant studies in large animals.

Animals↗
PubMed2004

The radical treatment of gastric carcinoma.

AIM: The aim of this paper is to review and assess the selective principles for a radical treatment of gastric carcinoma with respect to resection type as well as the role of lymphadenectomy. METHODS: From 1994 to 1999, we operated 222 patients affected by gastric adenocarcinoma at the 1st Surgical Clinic Institute in Padua. Out of the whole group, 138 patients (62.1%) underwent radical surgical treatment (75 patients with total gastrectomy, extended in 30 cases, and 63 patients by means of gastric resection). RESULTS: The overall survival rate at a median follow-up of 4 years was 58% for the patients treated with total gastrectomy, and 77% in case of distal gastric resection; 97% of patients with early gastric cancer are alive at a median follow-up of 3 years. CONCLUSION: Whenever it is feasible, subtotal gastrectomy could ensure a radical treatment of gastric carcinoma with low morbidity and mortality rate. The survival rate of such patients was 77%. Prognosis of early gastric cancer is excellent. Patients with IV stage tumors surgically treated had a poor outcome, and they should be susceptible of a multidisciplinary palliative approach.

Adenocarcinoma↗
PubMed2003

Laparoscopic treatment of simple hepatic cysts and polycystic liver disease.

BACKGROUND: The authors present their experience in the laparoscopic management of hepatic cysts and polycystic liver disease (PLD). METHODS: Between January 1996 and January 2002, 16 patients underwent laparoscopic liver surgery. Indications were solitary giant cysts (n = 10) and PLD (n = 6). Data were collected retrospectively. RESULTS: Laparoscopic fenestration was completed in 15 patients. Median operative time was 80 min. There was no deaths. Complications occurred in four patients: one patient with a solitary liver cyst experienced diarrhea, while a pleural effusion, a bleeding from the trocar-insertion site, and ascites occurred in three patients with PLD. Median follow-up was 34 months. There was one asymptomatic recurrence (11%) in one patient with a solitary cyst. Two patients with PLD had a symptomatic recurrence of a liver cyst. CONCLUSION: Laparoscopic fenestration could be the preferred treatment of solitary liver cysts and PLD. Adequate selection of patients and type of cystic liver together with a meticulous surgical technique are recommended.

Adult↗
PubMed2003

Liver transplantation for the management of hepatoblastoma.

INTRODUCTION: Hepatoblastoma (HEP) is the most frequent liver malignancy occurring in childhood. Surgical resection currently represents the gold standard for treatment. In patients with initially unresectable tumors, chemotherapy may induce remarkable reductions in size. In nonresponder patients, liver transplantation (OLTx) may offer a chance of cure. MATERIALS AND METHODS: From 1990 to 2003, a total of 400 OLTx (31 pediatric transplants) have been performed at Padua University. Seven patients (4 males and 3 females) underwent OLTx for hepatoblastoma. All patients presented with bilobar liver involvement and had received chemotherapy according to the SIOPEL-1. In all patients preoperative staging was negative for extrahepatic involvement. RESULTS: The mean age of the pts was 8.2 years (range 6.4 months to 34 years). Mean follow-up after OLTx was 41.4 months (median 36, range 3 to 108 months). Actuarial patient survival rates after OLTx for hepatoblastoma are 83.3%, 83.3%, and 56% at 1, 3, and 5 years, respectively. Five of seven subjects with HEP are alive after transplant at 3, 12, 36, 65, and 108 months. Two patients died owing to recurrent disease after 6 and 60 months, respectively, from transplantation. Another subject, primarily treated with surgical resection, shows HEP recurrence at 40 months after OLTx. The remaining 4 patients are alive and well at a mean follow-up of 28 months (median 24, range 3 to 65 months). CONCLUSIONS: Liver transplantation may represent a valid therapeutic option for patients with unresectable HEP, but it is contraindicated in cases of recurrence following previous resection surgery. Neo-adjuvant chemotherapy is of paramount importance to obtain good long-term results.

Adolescent↗
PubMed2003

Blunt liver injury: from non-operative management to liver transplantation.

Therapeutic options for blunt hepatic trauma include both non-operative and operative management. We have reviewed our experience of the management of blunt hepatic trauma, from non-operative to liver transplantation. A total of 72 patients with blunt hepatic injury observed at the first surgical unit of Padua in a 3-year period (1998-2000) were analysed; we also included a patient who had a liver transplant in 1993 for severe liver trauma. Twenty-nine patients (39.7%) were treated conservatively, with a 93% success rate; 60.3% were treated surgically. Suture hepatorraphy was the most common procedure performed (52.3%). Advantages of non-operative management in our experience were the reduced need for transfusion (1.1U versus 4.3U) with 92% of patients not needing transfusion, and a reduced stay in the intensive care unit; there was no liver-related mortality. The overall morbidity in surgical patients was 30%, with 16% liver-related complications. Twelve surgical patients (27.2%) died, with a liver-related mortality of 18.2%. A large number of patients may present with an associated endo-abdominal injury, even in low-grade liver trauma, requiring rapid laparotomy. In high-grade hepatic trauma, the evolution toward liver failure is an indication for liver transplantation.

Adolescent↗
PubMed2003

A rare surgical complication of Crohn's diseases: free peritoneal perforation.

BACKGROUND: Free peritoneal perforation is a rare complication of Crohn's disease. METHODS: We evaluated the incidence of free peritoneal perforation among 208 patients with Crohn's disease surgically treated in the period 1992-2000. RESULTS: Five patients (2.4%) suffered from free peritoneal perforation. In 1 patient free peritoneal perforation was the first symptom of Crohn's disease. In 3 cases the perforation was in the small bowel and in 2 in the large bowel. All patients underwent surgery: all cases had a resection of the involved bowel and in two cases an ileostomy was performed in order to prevent severe peritonitis. We did not observed mortality or major complications. CONCLUSIONS: Free peritoneal perforation is rare with about 100 cases reported in literature. No correlation seems to exist with previous corticosteroid treatment. The surgical treatment is mandatory. Simple suture should be avoided. The most appropriate treatment, whenever it is feasible, is resection of the involved bowel with immediate or, in case of severe sepsis, delayed anastomosis.

Adolescent↗
PubMed2003

Bioartificial liver support. Review and personal experience.

End-stage liver disease is treated successfully by liver transplantation. In spite of the recent advances in transplantation techniques, donor organ shortage remains a serious problem. Conditions such as fulminant hepatic failure are still burdened by a high mortality rate. This has prompted the design of an extracorporeal liver assist device, to "bridge" patients over until they either recover or receive a liver transplant. In these devices, various types of liver cells are inserted and different device designs have been proposed. The paper will review different models of bioartificial liver and will describe ongoing clinical trials. At the end we will report our experimental experience with a newly designed bioartificial liver, evaluating its beneficial effect on acute liver failure.

Bioreactors↗
PubMed2002

Breast complaints and risk of breast cancer. Population-based study of 2,879 self-selected women and long-term follow-up.

The aim of this study was to provide information about risk of breast cancer (BC) in women with breast complaints undergoing spontaneously clinical examination. The records of 2,879 self-selected symptomatic new patients observed consecutively were reviewed, and the chief breast complaint such as pain, lump and nipple discharge had been recorded. Patients were divided in three groups: Group A, 1,186 (41.2%) patients aged < 41 years; Group B, 809 (28.1%) patients aged 41-55 years; and Group C, 884 (30.7%) patients aged > 55 years. Pain was most common (P < 0.01) in Group A (60.8%), and lump in Groups B (53.3%) and C (89.7%). A total of 318 (11.0%) women had histologically confirmed BC (Group A = 3.5%, Group B = 30.5%, Group C = 66.0%), accounting for 3.2, 16.4 and 12.0% of patients with pain, lump and nipple discharge, respectively. Breast complaints were equally (P= NS) distributed between patients with and without BC. The relative risk (RR) of BC developing ranged between 0.5-1.4, 0.5-1.9, and 0.6-3.0 in Groups A, B, and C, respectively. It ranged between 0.3 and 0.7 in patients with breast pain, and was significantly higher (RR = 1.9-3.0) only in patients with breast lump aged > 40 years. In conclusion, in symptomatic patients BC risk is strictly related to age, and independent of the referred symptoms. Therefore, further investigations have to be warranted only when risk factors different from breast complaints are present.

Adult↗
PubMed2002

ALEX (artificial liver for extracorporeal xenoassistance): a new bioreactor containing a porcine autologous biomatrix as hepatocyte support. Preliminary results in an ex vivo experimental model.

Long-term maintenance of viability and expression of differentiated hepatocyte function is crucial for bioartificial liver support. We developed a new bioreactor design (ALEX), associated with a new extracellular autologous hepatocyte biomatrix (Porcine Autologous Biomatrix - PBM) support. To test this new bioreactor, we compared it to a standard BAL (BioArtificial Liver) cartridge in a ex vivo model using human plasma added to bilirubin, ammonium and lidocaine. A pathology study was performed on both bioreactors. The results suggest that ALEX allows a maximal contact between the perfusing plasma and the liver cells and a proper hepatocyte support by a cell-to-matrix attachment. ALEX is a suitable cell support bioreactor, guaranteeing long-term maintenance of the metabolic activity of hepatocytes when compared to a standard BAL cartridge.

Ammonia↗
PubMed2001

Yttrium-aluminum-garnet laser therapy of esophageal granular cell tumor.

BACKGROUND: Granular cell tumor (GCT) is a rare lesion. Approximately 4% to 6% of these tumors occur in the gastrointestinal tract, one-third of them affecting the esophagus. Almost all GCTs are benign lesions. Approximately 1% to 3% are malignant. Endoscopic ultrasonography (EUS) is a diagnostic support. The best treatment for esophageal GCT is not yet clear, whether surgical excision, periodic observation, endoscopic excision, or yttrium-aluminum-garnet (YAG) laser therapy. METHODS: From November 1992 to December 2000, four patients with GCTs of the esophagus were observed. All the patients underwent EUS evaluation and endoscopic YAG laser therapy of the esophageal neoplasm. At each session, a biopsy at the tumor site was obtained. The treatment was continued until endoscopic and histologic evidence of the tumor disappeared. RESULTS: After the YAG laser therapy, no evidence of the tumor was found in any of the four patients with esophageal GCT. At this writing, the patients remain disease free after a mean follow-up period of 66 months. No complication has been observed. Only four sessions for each patient were necessary to eliminate the tumor. CONCLUSIONS: Therapy with YAG laser was effective in all four patients with esophageal GCT, and complete necrosis of the submucosal neoplastic cells was achieved. Endoscopic YAG laser therapy appears to be a good compromise between esophageal dissection and long-term observation without tumor excision. Esophageal laser therapy is safe if correctly used, and previous EUS evaluation increases treatment safety.

Adult↗
PubMed2001

Adrenocortical carcinoma: is prognosis different in nonfunctioning tumors? results of surgical treatment in 31 patients.

From 1980 to 1998 a series of 265 patients with adrenal tumors underwent surgery, with an adrenocortical carcinoma found in 31 (11.7%). Altogether, 17 (54.8%) patients (group A) had Cushing syndrome (n = 15) or virilization (n = 2), and 14 (45.2%) patients (group B) had nonfunctioning adrenal tumors. Tumor staging was as follows: (groups A/B): stage I, n = 5 (3/2), stage II, n = 14 (9/5), stage III, n = 5 (1/4), stage IV, n = 7 (4/3) patients. There were 12 (38.7%) men and 19 (61.3%) women (median age 51 years, range 25-73 years), and the size of the mass ranged from 3.5 to 20.0 cm (median 8.0 cm), with no differences (p = NS) between groups A and B. Two (6.4%) patients (stage IV) did not undergo surgery and received only palliative drug treatment; 6 (19.4%) were treated with debulking surgery; 15 (48.4%) had unilateral adrenalectomy; and 8 (25.8%) had an extended adrenalectomy. Eighteen (58.0%) patients underwent adjuvant postoperative mitotane treatment, and in 8 (25.8%) patients one or more reoperations for recurrence were required. Nine (29.0%) patients are still alive with a mean follow-up of 34 months; 22 (71.0%) died 2 to 60 months (median 20 months) after surgery. The overall 2- and 5-year survival rates were 62.1% and 10.3%, with no difference (p = NS) between groups A and B. The survival rates at the 1- and 3-year follow-ups were 90.3% and 32.3% (stages I and II) and 71.0% and 6.5% (stages III and IV). In conclusion, adrenocortical carcinoma remains a highly malignant tumor, and stage III-IV patients still have a poor prognosis; but nonfunctioning tumors do not seem to be more aggressive.

Adrenal Cortex Neoplasms↗
PubMed2001

Antibiotic prophylaxis in clean surgery: breast surgery and hernia repair.

Use of prophylactic antibiotics in clean surgery is still controversial. We reviewed the literature of the last 10 years to identify the best way to approach clean surgery. The question is more important for patients undergoing breast surgery. The presence of an infected breast wound delays the beginning of postoperative adjuvant anticancer therapy: there is good evidence to suggest that delayed adjuvant therapy compromises the outcome for patients in terms of both local control and survival. There are several clinical trials that have addressed the efficacy of prophylactic antibiotics for patients undergoing breast surgery and hernia repair. Platt et al assessed the efficacy of preoperative antibiotic prophylaxis in a clinical trial of 1218 patients undergoing clean surgery with an absolute reduction rate of 39% in wound infections. Gupta et al reported no influence on the incidence of infective complications by antibiotic prophylaxis in 357 patients undergoing elective breast surgery. Like breast surgery, use of prophylaxis in hernia repair is not clear: a prospective, randomized, double-blind, multicenter study of 619 patients assessed no benefit of antibiotic prophylaxis. On the other hand Lewis et al reported a 75% reduction of infections in low-risk patients when a single dose of cefotaxime was used in clean operations. A particularly interesting point is the use of prosthetic mesh in hernia repair and primary reconstructive surgery in breast surgery. Amland et al reported a significant reduction of the incidence of wound infections in a group of patients undergoing reconstructive breast surgery, receiving azithromycin vs placebo (5% vs 20%). In hernia repair we stress the need to prevent wound infections: currently Liechtestein's technique is widely performed all over the world. Mesh infection is an unpleasant event that requires prosthesis removal. The lack of conclusive studies about antibiotic prophylaxis in clean surgery suggests that a single-dose of cephalosporin at the induction of anesthesia may be prudent. This procedure is certainly inexpensive and safe and, more importantly, probably does not have an impact on antibiotic resistance.

Anti-Bacterial Agents↗