Meta-analysis and review of prospective randomized trials comparing laparoscopic and Lichtenstein techniques in recurrent inguinal hernia repair.

PURPOSE: The hypothesis of this meta-analysis was to assess whether laparoscopic approach shows real benefits over Lichtenstein technique in recurrent inguinal hernia repair. METHODS: A literature search for prospective randomized trials comparing laparoscopic and Lichtenstein procedure in recurrent inguinal hernia repair was performed. Trials were reviewed for primary outcome measures: re-recurrence, chronic inguinal pain and ischemic orchitis; and for secondary outcome measures. Standardized mean difference (SMD) was calculated for continuous variables and odds ratio for dichotomous variables. RESULTS: Seven studies comparing laparoscopic and Lichtenstein technique were considered suitable for the pooled analysis. Overall 647 patients with recurrent inguinal hernia were randomized to either laparoscopic repair (333, 51.5 %, transabdominal preperitoneal approach, TAPP and totally extraperitoneal approach, TEP) or anterior open repair (314, 48.5 %, Lichtenstein operation). Patients who underwent laparoscopic repair experienced significantly less chronic pain (9.2 % vs. 21.5 %, p = 0.003). Patients of the laparoscopic group had a significantly earlier return to normal daily activities (13.9 vs. 18.4 days, SMD = -0.68, 95 % CI = -0.94 to -0.43, p < 0.000001). Operative time was significantly longer in laparoscopic operations (62.9 vs. 54.2 min, SMD 0.46, 95 % CI 0.03, 0.89; p = 0.04). No other differences were found. CONCLUSIONS: Laparoscopy showed reduced chronic inguinal pain and an earlier return to normal daily activities but significantly longer operative time. Despite the expected advantages, the choice between laparoscopy and other techniques still depends on local expertise availability. Only dedicated centers are able to routinely offer laparoscopy for recurrent inguinal hernia repair.

Encapsulated papillary thyroid carcinoma: is it a distinctive clinical entity with low-grade malignancy?

BACKGROUND: Encapsulated papillary thyroid carcinoma (EPTC) is commonly retained as a tumor with indolent clinical courses. Herein we focused on the search for factors predicting biological behavior and influencing prognosis of EPTC in comparison with the non-encapsulated counterpart of papillary thyroid carcinoma (NEPTC). METHODS: From January 1998 to May 2009, 348 patients underwent thyroidectomy in our surgical department because of papillary thyroid carcinoma (PTC). A cross-sectional study of 52 patients with EPTC and 296 patients with NEPTC was carried out: demographic data, tumor characteristics, diagnostic results, patient management, post-operative and follow-up results were evaluated. RESULTS: EPTC patients were significantly younger than patients with NEPTC (44.5 vs 48.8 yr, p<0.04). Mean tumor size was significantly greater for EPTC than for NEPTC (2.36 vs 1.41 cm, p<0.001). Tumor multifocality, thyroid capsular invasion, and lymph node involvement at diagnosis were significantly associated with NEPTC (p=0.0001, p<0.0001, and p=0.027, respectively). Multivariate analyses showed that NEPTC classical variant were at risk for both thyroid capsular invasion and nodal involvement (odds ratio 6.870 and 9.514, respectively) while EPTC were not. Nodal metastasis at diagnosis was the only factor influencing recurrence. CONCLUSIONS: The majority of EPTC had risk-free clinical courses as a result of their low risk of locoregional spread. However, definitive recommendations need a longer follow-up and a comparison with a lesser treated group of patients belonging to the same category of risk at diagnosis.

Triiodothyronine stimulates hepatocyte proliferation in two models of impaired liver regeneration.

OBJECTIVES: Liver regeneration is attenuated in old age and is substantially slower after 90% than after 70% partial hepatectomy (PH). We have previously demonstrated that the proliferative response to a primary mitogen is intact in aged mice, indicating that impaired liver regeneration is not due to loss of proliferative capacity. Here, we have investigated whether mitogenic effects of triiodothyronine (T3) could reverse the impaired regeneration of ageing or 90% hepatectomy, in the rat. MATERIALS AND METHODS: T3 (20 microg/100 g body weight) was administered to 14-month-old rats subjected to 70% PH or to young rats subjected to 90% PH. Cell-proliferative capacity was determined by bromodeoxyuridine incorporation and microscopy and changes of cell cycle-related proteins were analysed by Western blot analysis. RESULTS: Treatment of old intact rats with T3 increased cyclin D(1) expression that was followed by an enhanced proliferative response, the labelling index (LI), being 7.8% versus 1.3% of controls. T3 given before 70% PH stimulated regenerative response (LI was 10.8% versus 2.28%), and expression of cyclin D(1) and proliferating cell nuclear antigen (PCNA) 24 h after PH. Pre-treatment with T3 also improved the regenerative response of the liver after 90% hepatectomy (LI was 27.9% versus 14.2%). CONCLUSIONS: These findings show in principle that mitogen-induced hyperplasia could be applied to human therapy in patients with reduced regenerative capacity or massive loss of hepatocytes.

Role of SPECT/CT in the preoperative assessment of hyperparathyroid patients.

PURPOSE: Our purpose was to assess the clinical value and additional benefit of fusion single-photon computed tomography (SPECT) and computed tomography (CT) images in locating the parathyroids in a selected group of patients affected by primary (PHP) and secondary hyperparathyroidism (SHP). MATERIALS AND METHODS: Sixteen patients (11 women and five men; age range 35-80 years) with severe hyperparathyroidism (HP) (ten PHP, six SHP) were studied by ultrasound (US), and, after i.v. injection of 370 MBq of 99mTc-sestamibi, by planar parathyroid scintigraphy, SPECT and SPECT/CT using a dual-detector scintillation camera GE Infinia Hawkeye. All patients underwent parathyroidectomy. RESULTS: US findings were inconclusive in 12/16 patients affected by multinodular goitre, and two probable eutopic parathyroid glands were identified. "Double phase" parathyroid scintigraphy identified 14 probable parathyroid glands, SPECT 23 (14 ectopic and nine eutopic) and SPECT/CT confirmed all 23 probable parathyroid lesions, offering more precise localisation and an evident improvement in diagnostic accuracy. Sixteen of these foci of increased uptake were hyperplastic parathyroid glands, six were adenomas, one was a parathyroid carcinoma and one was a thyroid follicular carcinoma. Surgical detection of the 23 sestamibi-positive lesions was correctly matched with 100% of SPECT/CT images and 61% of SPECT data alone. Hybrid imaging thus provided additional data in 39% of lesions, and in three patients with retrotracheal glands, it modified the surgical approach. CONCLUSIONS: We believe 99mTc-sestamibi SPECT/CT to be a more reliable presurgical method to study a patient subgroup affected by PHP or SHP in whom conventional US and other scintigraphic methods have failed for intrinsic reasons due to the concomitant presence of multinodular goitre or ectopic parathyroid gland. The additional practical benefit derived from this methodology was evident. In fact, anatomical information provided by CT enables precise localisation of the functional abnormalities highlighted by SPECT, and both are essential to a correct surgical approach.

Expression of ATP7B in normal human liver.

ATP7B is a copper transporting P-type ATPase, also known as Wilson disease protein, which plays a key role in copper distribution inside cells. Recent experimental data in cell culture have shown that ATP7B putatively serves a dual function in hepatocytes: when localized to the Golgi apparatus, it has a biosynthetic role, delivering copper atoms to apoceruloplasmin; when the hepatocytes are under copper stress, ATP7B translocates to the biliary pole to transport excess copper out of the cell and into the bile canaliculus for subsequent excretion from the body via the bile. The above data on ATP7B localization have been mainly obtained in tumor cell systems in vitro. The aim of the present work was to assess the presence and localization of the Wilson disease protein in the human liver. We tested immunoreactivity for ATP7B in 10 human liver biopsies, in which no significant pathological lesion was found using a polyclonal antiserum specific for ATP7B. In the normal liver, immunoreactivity for ATP7B was observed in hepatocytes and in biliary cells. In the hepatocytes, immunoreactivity for ATP7B was observed close to the plasma membrane, both at the sinusoidal and at the biliary pole. In the biliary cells, ATP7B was localized close to the cell membrane, mainly concentrated at the basal pole of the cells. The data suggest that, in human liver, ATP7B is localized to the plasma membrane of both hepatocytes and biliary epithelial cells.

Hypocalcemia following total thyroidectomy: early factors predicting long-term outcome.

Hypocalcemia following total thyroidectomy (TT) must be considered permanent in patients requiring calcium replacement after one year. The aim of this study was to identify early risk factors predicting long-term outcome of postoperative hypocalcemia. Among 453 patients who underwent TT from January 1998 to May 2003, a cross-sectional study between 44 patients with transient hypocalcemia (9.7%) and 3 patients with permanent hypocalcemia (0.7%) was carried out. Both low serum calcium level (< 8 mg/dl) and high serum phosphorus level (> 4.5 mg/dl), measured on postoperative day 7, were predictive for outcome. Central neck lymph node dissection, performed for thyroid carcinoma, also correlated with outcome. Serum phosphorus level > 4.5 mg/dl on postoperative day 7 resulted the only independent factor predicting permanent hypoparathyroidism. Therefore indication for central dissection would be very strict. When serum phosphorus level is unfavorable a correct replacement therapy is mandatory to prevent the consequences of permanent hypocalcemia.

GIST: a clinical dilemma.

The authors report a clinical case of malignant gastric and duodenojejunal GIST, in which the only surgical treatment seems to be definitive. In a 69-year-old female, a surgical resection of the gastric and duodenojejunal tumor was performed. Histological analysis showed two spindle cells stromal tumors with mitotic rate >20/10 HPF and its uncommitted origin was demonstrated. Despite the high malignancy degree, the patient refused chemotherapy treatment and there were no local recurrence nor metastasis at a follow-up of 8 years. For this reason and because of the uncertain behavior of histologically benign GIST, the authors propose a lifelong follow-up of all patients managed with potentially curative surgical resection.

One-stage treatment in emergency setting for obstructing colorectal cancer.

The aim of this study was to evaluate the indications for one-stage treatment of obstructing colorectal cancer. From January 1998 to December 2003, 19 patients were operated on at our department for obstructing colorectal cancer. Thirteen patients underwent one-stage operation with immediate anastomosis without diversion, while 6 patients were managed palliatively. We performed resection and anastomosis following intraoperative irrigation in obstructing sigmoid cancer without colonic wall lesions, while subtotal colectomy was carried out in case of massively distended colon with ischemic lesions. Colostomy was indicated in 6 high-risk patients with unresectable lesions. In case of obstructing left colorectal cancer, an experienced surgeon can perform one-stage resection and anastomosis on good general status patients, conversely defunctioning colostomy may be ideal for surgeons with little experience in colorectal surgery and in very poor prognosis patients.

The usefulness of 99mTc-SestaMIBI scan in the diagnostic evaluation of thyroid nodules with oncocytic cytology.

OBJECTIVE: To assess the relevance of (99m)Tc-SestaMIBI (MIBI) scan in the diagnostic evaluation of thyroid nodules with oncocytic cytology. SUBJECTS AND METHODS: Twenty-four patients with a single (or prevalent) 'cold' solid nodule with Hurthle cells (HC) at fine needle aspiration cytology (FNAC) were studied. Cytological diagnosis of oncocytic metaplasia (OM) or HC tumor (HCT) was made when HC on the smear were comprised 10-75%, or >75%. Nodules concentrating MIBI at early and late (2 h after washout) stages were considered MIBI-positive. In all cases histological findings were obtained after total thyroidectomy. RESULTS: FNAC was malignant or suspect for malignancy in 16 cases (six HCT and 10 OM) and not suspect in eight (two HCT and six OM). Histological examination revealed 14 malignant tumors (11 HCT and three OM), and 10 benign thyroid lesions (three HCT and seven OM). Sensitivity of FNAC for malignancy was 92.8% and specificity was 70.0%; HCT were identified by FNAC in only 35.7% and OM in 70.0% of cases. No significant difference in MIBI positivity was found between malignant and benign thyroid nodules. The highest percentage of MIBI positivity was found in HCT (78.5%), but MIBI-positive nodules were also observed in thyroid lesions with HC metaplasia (40.0%). CONCLUSIONS: MIBI scintiscan has no value in differentiating malignant from benign HC thyroid neoplasias. Most HCT are MIBI-positive, but this scan is not sufficiently specific to differentiate true HC neoplasias from other thyroid lesions showing HC at FNAC, although an MIBI-negative scan strongly supports the absence of true HCT.

[Predictive factors for malignancy in Hürthle-cell thyroid neoplasia. Effect of surgical treatment]. / Fattori predittivi di malignità nelle neoplasie tiroidee a cellule di Hürthle. Influenza sul trattamento chirurgico.

The aim of this study has been to evaluate factors predicting malignancy in patients with Hürthle cell neoplasms. Medical records from 36 patients who underwent thyroidectomy for Hürthle cell neoplasms between January 1998 and December 2002 were analyzed. Of the 36 patients, 19 had carcinomas and 17 had adenomas, resulting in a 52.7% prevalence of malignancy. Both fine-needle aspiration and intraoperative frozen section had low sensitivities in cancer detection (22.2% and 33.3% respectively). Hürthle cell carcinomas were significantly larger than adenomas (30.3 mm +/- 3.9 vs 17.6 mm +/- 2.3, P = 0.012), however 42% of carcinomas had a diameter between 10 and 20 mm. Size of Hürthle cell tumors is predictive of malignancy, but it is not the only factor to make surgical decision effective. Because of these uncertainties, authors believe that total thyroidectomy is the treatment of choice of all Hürthle cell neoplasms.

Bile leak from the accessory biliary duct following laparascopic cholecystectomy.

Anatomists and surgeons have described the presence of accessory biliary ducts between the liver and gallbladder. Bile leakage from accessory duct following laparoscopic cholecystectomy (LC) is an unusual post-operative complication. Aim of the study was to assess its incidence, the intraoperative methods helpful for notice the anatomical anomaly and the impact of endoscopic procedure as a suitable treatment. From January 1997 to September 2002, 185 patients underwent LC for symptomatic cholelithiasis in our surgical department. Post-operative bile leakage from accessory biliary duct occurred in two patients (1%): one case from the liver bed of gallbladder (duct of Luschka) and one case from an aberrant cholecystohepatic duct entering Hartmann's pouch. One patient underwent open celiotomy because of unavailability of endoscopic retrograde cholangiopancreatography. The other patient was successfully treated by endoscopic sphincterotomy and nasobiliary tube placement. By careful dissection, accessory ducts were noticed and clipped in three other patients with overall incidence of 2.7%. Meticulous laparoscopic technique aimed to careful recognize all structures during LC is the main policy to contain biliary injury within its nadir incidence. Depending of availability, endoscopic sphincterotomy and nasobiliary drainage allow diagnosis and treatment of bile leakage, preserving the effectiveness of laparoscopic procedure.

Uncommitted gastrointestinal stromal tumour. Case report.

Gastrointestinal Stromal Tumours (GIST) are mesenchymal tumours with uncertain prognosis. Malignant variety represents about 2.0% of malignant gastroenteric tumours. The Authors report a clinical case of malignant gastric and duodenojejunal GIST, in which the only surgical treatment seems to be definitive. R. S., a 69-year-old female, was admitted for asthenia and fever in January 1997. Endoscopic exploration, ultrasonography and CT-scan of the abdomen demonstrated an exophytic tumour in the greater gastric curvature and one tumour of 5.5 cm of diameter in the Treitz's angle. We performed a resection of the gastric tumour and the duodenojejunal angle. Postoperative course was uneventful and the patient was discharged after 14 postoperative hospital days. Histological analysis showed two spindle cells stromal tumours with mitotic rate > 20/10 HPF. The immunohistochemistry demonstrated the uncommitted origin of tumour cells. The patient refused the chemotherapy treatment. There was no local recurrence or metastasis at a follow up of 47 months, in spite the high malignancy degree. For this reason and because of the uncertain behaviour of benign GIST, the authors propose a lifelong follow up of the patients managed with potentially curative surgical resection.

Early surgical treatment of acute cholecystitis. A retrospective comparative study of the laparoscopic and open approaches.

The aim of this retrospective study was to compare the results of laparoscopic and open early cholecystectomy in patients with acute cholecystitis. From January 1997 to October 2000, 168 patients underwent cholecystectomy in our institution. Of the 35 patients (20.8%) with acute cholecystitis, 20 patients (57.1%) were operated on laparoscopically and the other 15 patients (42.9%) with the traditional open approach. The two groups were similar in terms of age, sex and onset of symptoms. The postoperative morbidity was 15.0% in the laparoscopic group versus 40.0% in the open group. The average postoperative hospital stay in the laparoscopic group was 5.1 days as compared to 10.5 days in the open group (P = 0.013). The conversion rate to laparotomy was 5.0% (1 case). At follow-up there has been one case of incisional hernia in the open group. Early laparoscopic cholecystectomy for acute cholecystitis was associated with a lower postoperative morbidity rate and significantly earlier patient discharge.

[Carotid body tumour. Case report and literature review]. / Il tumore del glomo carotideo. Presentazione di un caso clinico e revisione della letteratura.

The tumour of the carotid body is rare. About 1000 cases had been reported in the literature. It may occur sporadically in 90% of cases and it affects both sexes in the same proportion and in the middle age. This tumour may be misdiagnosed if it is not suspected. Ultrasono-graphy and color-Doppler scan show a hypervascular tumour between the internal and external carotid arteries. CT-scan defines the tumour s extent on the surrounding structures. Angiography is the gold standard for diagnosis, showing a hypervascular mass displacing the bifurcation of the carotid arteries. Sometimes radiotherapy and embolization are indicated but the surgical excision of carotid body tumours is the therapy of choice. The surgical approach through incision like carotid artery operation is performed. If the subadventitial plane between tumour and arterial wall is not identified, resection of carotid artery and insertion of a shunt is required. Although the diagnosis and the surgical technique advances, the incidence of postoperative nerve injury is high in the different series. The clinical suspect and the early diagnosis are very important because low morbidity rate occurs with resection of a small chemodectoma. The surgical excision can be followed by postoperative respiratory depression or dyspnea both with regional and general anesthesia. The authors report a case of a medium size tumour operated on and developing a mild transient weakness of cranial nerve VII. Recent trends in evaluation and therapy are analysed and the literature is reviewed.

[Urgent cholecystectomy in acute cholecystitis: laparoscopy or laparotomy?]. / Colecistectomia d'urgenza nella colecistite acuta: laparoscopia o laparotomia?

Early cholecystectomy is the best policy in the case of acute cholecystitis. The aim of this retrospective study is to evaluate the current treatment of choice of acute calculous cholecystitis, as seen in our experience and in the literature data. Between January 1997 and July 2000, 150 patients were operated on for cholecystectomy. In the group of 30 patients (20%) with acute cholecystitis, 15 patients (50%) were managed with laparoscopic approach while 15 patients (50%) with traditional operation. At the beginning the Authors chose the open via for understand the pathologic findings of acute cholecystitis, then they always preferred the laparoscopic approach. Comparison between two groups concerned the interval between onset of symptoms and operation, postoperative mortality and morbidity rates, postoperative hospital stay and follow up. Statistical analysis was performed by the Student's t-test and the chi-square test. Both groups were homogeneous with regard to sex, age and onset of symptoms. There were no deaths and morbidity rate in the laparoscopic group was 20% versus 40% (p = ns). The average postoperative hospital stay in the laparoscopic group was 5.6 days versus 10.5 days (p = 0.046). The conversion rate into laparotomy was 6.6% (1 case). There has been one case of incisional hernia in the open group at a mean follow up of 20 month. Early laparoscopic cholecystectomy is the treatment of choice of acute cholecystitis because of a lower postoperative morbidity rate and a significant shorter hospital stay.

[Ultrasonography of acute colonic diverticulitis. Effect on surgical treatment]. / Lo studio ecografico nella diverticolite acuta del colon. Influenza sul trattamento chirurgico.

The clinical diagnosis of acute colonic diverticulitis (ACD) is at times difficult and an early detection by a non-invasive method as ultrasonography (US) is required. The aim of this study is to evaluate the diagnostic sensibility of US performed on admission in patients with ACD, its value in monitoring assessment of severity and its influence on surgical decision. The Authors have carried out a retrospective study on 22 patients (8 men and 14 women, median age 58 years) admitted from January 1997 to June 1999 for ACD. In 21 cases the diagnosis was made on admission by US. The diagnostic sensibility was 95.5% (false-negative: 1 case). The true diagnosis in 2 false-positive patients was: ischemic colitis (1 case), aspecific thickening of colonic wall in patient with left renal carcinoma (1 case). The sensibility of clinical evaluation on admission was 68% (false-negative: 7 cases). The clinical diagnosis was unequivocal in only 36.4% of cases. In 14 patients, successfully treated conservatively, the US gave monitoring the reduction of hypoechogenic thickening of the colonic wall. Seven patients who underwent urgent surgery: in 3 cases for generalized peritonitis, but in 4 patients (18.2%) the immediate management was influenced by US detection of a clinical misdiagnosed abscess. The Authors conclude that, in the hands of an expert investigator, the extensive use of US in acute abdominal pain facilitate an accurate diagnosis of ACD and its appropriate management.

[Transmission and scanning microscopy of elastofibroma ultrastructure]. / Studio ultrastrutturale a trasmissione e a scansione dell'elastofibroma.

Elastofibroma is a rare benign tumor of soft tissues that has the elective localization in peri- or interscapular region. It is characterized by the proliferation of fibroblast-like cells which appear enveloped by abundant elastic and collagen fibers. Here we present a case of elastofibroma, observed in a 63 year old woman in the interscapular region. The neoformation has been studied by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). Our hypothesis is the possibility that elastofibroma is the consequence of active neoformation of fibers elastic normal in the quality that subsequently is meet to progressive degenerative phenomenons.

[Human fibrin glue in the treatment of residual parenchymal surface after total pericystectomy for hepatic echinococcus]. / La colla di fibrina umana nel trattamento della superficie parenchimale residua a pericistectomia totale per echinococco epatico.

The aim of this study was to evaluate the presumed efficacy of fibrin sealant in limiting bleeding and biliary leakage from liver residual surface after total pericystectomy for hydatid disease. Forty-five patients (group A) who underwent total pericystectomy in our Institution from 1986 to 1995 and liver residual surface treated with conventional techniques and fibrin sealant for control of haemorrhage and bile leakage were selected. A control group (B) was carefully selected, matching the main characteristics of patients in group A: it consisted of 44 patients, who underwent total pericystectomy from 1981 to 1993 and in which fibrin sealant was not used. Postoperative hospital stay, morbidity, mortality, abdominal drainage discharge, perioperative variations of hemoglobin and hematocrit readings and the need for postoperative blood transfusion were evaluated in the two groups. A statistical analysis was performed. We found no statistical significance for the considered parameters in the two groups. Markedly no significative difference was found in morbidity, abdominal drainage discharge and need for postoperative blood transfusion. Our results do not allow a definite assessment of the actual role of fibrin sealant in rising efficacy on control of bleeding and biliary leakage from residual liver surface to total pericystectomy obtained with conventional haemostatic techniques. We believe that a previously planned controlled prospective trial could give the needed further elements to precisely evaluate the role of fibrin sealant in the surgical treatment of hydatid disease of the liver.