Extended Analysis of Raman Spectra Using Artificial Intelligence Techniques for Colorectal Abnormality Classification.

Raman spectroscopy (RS) techniques are attracting attention in the medical field as a promising tool for real-time biochemical analyses. The integration of artificial intelligence (AI) algorithms with RS has greatly enhanced its ability to accurately classify spectral data in vivo. This combination has opened up new possibilities for precise and efficient analysis in medical applications. In this study, healthy and cancerous specimens from 22 patients who underwent open colorectal surgery were collected. By using these spectral data, we investigate an optimal preprocessing pipeline for statistical analysis using AI techniques. This exploration entails proposing preprocessing methods and algorithms to enhance classification outcomes. The research encompasses a thorough ablation study comparing machine learning and deep learning algorithms toward the advancement of the clinical applicability of RS. The results indicate substantial accuracy improvements using techniques like baseline correction, L2 normalization, filtering, and PCA, yielding an overall accuracy enhancement of 15.8%. In comparing various algorithms, machine learning models, such as XGBoost and Random Forest, demonstrate effectiveness in classifying both normal and abnormal tissues. Similarly, deep learning models, such as 1D-Resnet and particularly the 1D-CNN model, exhibit superior performance in classifying abnormal cases. This research contributes valuable insights into the integration of AI in medical diagnostics and expands the potential of RS methods for achieving accurate malignancy classification.

High Intratumoral i-tRF-GlyGCC Expression Predicts Short-Term Relapse and Poor Overall Survival of Colorectal Cancer Patients, Independent of the TNM Stage.

Colorectal cancer (CRC), one of the most prevalent types of cancer, requires the discovery of new tumor biomarkers for accurate patient prognosis. In this work, the prognostic value of the tRNA fragment i-tRF-GlyGCC in CRC was examined. Total RNA extraction from 211 CRC patient cancer tissue specimens and 83 adjacent normal tissues was conducted. Each RNA extract was subjected to in vitro polyadenylation and reverse transcription. A real-time quantitative PCR assay was used to quantify i-tRF-GlyGCC in all samples. Extensive biostatics analysis showed that i-tRF-GlyGCC levels in CRC tissues were significantly lower than in matched normal colorectal tissues. Additionally, the disease-free survival (DFS) and overall survival (OS) time intervals were considerably shorter in CRC patients with high i-tRF-GlyGCC expression. i-tRF-GlyGCC expression maintained its prognostic value independently of other established prognostic factors, as shown by the multivariate Cox regression analysis. Additionally, survival analysis after TNM stage stratification revealed that higher i-tRF-GlyGCC levels were linked to shorter DFS time intervals in patients with TNM stage II tumors, as well as an increased probability of having a worse OS for patients in TNM stage II. In conclusion, i-tRF-GlyGCC has the potential to be a useful molecular tissue biomarker in CRC, independent of other clinicopathological variables.

MicroRNA-675-5p Overexpression Is an Independent Prognostic Molecular Biomarker of Short-Term Relapse and Poor Overall Survival in Colorectal Cancer.

Colorectal cancer (CRC) is the main cause of cancer-related deaths globally, highlighting the importance of accurate biomarkers for early detection and accurate prognosis. MicroRNAs (miRNAs) have emerged as effective cancer biomarkers. The aim of this study was to investigate the prognostic potential of miR-675-5p as a molecular prognostic biomarker in CRC. For this reason, a quantitative PCR assay was developed and applied to determine miR-675-5p expression in cDNAs from 218 primary CRC and 90 paired normal colorectal tissue samples. To assess the significance of miR-675-5p expression and its association with patient outcome, extensive biostatistical analysis was performed. miR-675-5p expression was found to be significantly downregulated in CRC tissue samples compared to that in adjacent normal colorectal tissues. Moreover, high miR-675-5p expression was associated with shorter disease-free (DFS) and overall survival (OS) in CRC patients, while it maintained its unfavorable prognostic value independently of other established prognostic factors. Furthermore, TNM stage stratification demonstrated that higher miR-675-5p levels were associated with shorter DFS and OS intervals, particularly in patients with CRC of TNM stage II or III. In conclusion, our findings suggest that miR-675-5p overexpression constitutes a promising molecular biomarker of unfavorable prognosis in CRC, independent of other established prognostic factors, including TNM staging.

Raman Spectroscopy: A Personalized Decision-Making Tool on Clinicians' Hands for In Situ Cancer Diagnosis and Surgery Guidance.

Accurate in situ diagnosis and optimal surgical removal of a malignancy constitute key elements in reducing cancer-related morbidity and mortality. In surgical oncology, the accurate discrimination between healthy and cancerous tissues is critical for the postoperative care of the patient. Conventional imaging techniques have attempted to serve as adjuvant tools for in situ biopsy and surgery guidance. However, no single imaging modality has been proven sufficient in terms of specificity, sensitivity, multiplexing capacity, spatial and temporal resolution. Moreover, most techniques are unable to provide information regarding the molecular tissue composition. In this review, we highlight the potential of Raman spectroscopy as a spectroscopic technique with high detection sensitivity and spatial resolution for distinguishing healthy from malignant margins in microscopic scale and in real time. A Raman spectrum constitutes an intrinsic "molecular finger-print" of the tissue and any biochemical alteration related to inflammatory or cancerous tissue state is reflected on its Raman spectral fingerprint. Nowadays, advanced Raman systems coupled with modern instrumentation devices and machine learning methods are entering the clinical arena as adjunct tools towards personalized and optimized efficacy in surgical oncology.

Implant infections after breast reconstruction surgery following mastectomy: Experience from a Greek breast unit.

BACKGROUND: Despite the dominance of implant-based breast reconstruction after mastectomy, during recent years, it has been correlated to some complications. The aim of this study is to present the Greek experience about management of implant infections after breast reconstructions and to investigate the relationship between possible risk factors and breast pocket fluid cultures. METHODS: In total, 260 patients underwent implant-based breast reconstruction due to breast cancer in our center from 2016 until 2020. 46 patients, that underwent implant or expander replacement after breast reconstruction due to mastectomy were included in the present study. RESULTS: 260 patients underwent breast reconstruction in our center and in 46 (18%) of them an implant replacement was required. 21 patients (8%) presented clinically with an implant infection, but 12 of them (5%) had positive cultures from the breast pocket fluid. On the contrary, 25 patients (10%) presented no clinical signs of implant infection, but 5 of them (2%) had a positive culture. In addition, we demonstrated a correlation between implant infection and positive cultures (p = 0.009), along with an association between chemotherapy before implant placements and negative cultures (p = 0.035). Finally, the most common pathogen was Staphylococcus epidermidis (29%), followed by Escherichia coli (24%) and Staphylococcus aureus (18%). CONCLUSION: Implant infection still remains a very serious complication after breast reconstruction surgery. The establishment of a therapeutic protocol, with specific antimicrobial and surgical targets seems as an effective strategy against implant infections.

Femoral fractures are an indicator of increased severity of injury for road traffic collision victims: an autopsy-based case-control study on 4895 fatalities.

INTRODUCTION: The course of road traffic collision (RTC) victims with femoral fractures (FFx) from injury to death was reviewed. We sought to correlate the presence of femoral fractures with the overall severity of injury from RTCs using objective indices and to identify statistically significant associations with injuries in other organs. PATIENTS AND METHODS: A case-control study based on forensic material from 4895 consecutive RTC-induced fatalities, between 1996 and 2005. Injuries were coded according to the Abbreviated Injury Scale-1990 Revision (AIS-90), and the Injury Severity Score (ISS) was calculated. Victims were divided according to the presence of femoral fractures in all possible anatomic locations or not. Univariate comparisons and logistic regression analysis for probabilities of association as odds ratios (OR) were performed. RESULTS: The FFx group comprised 788 (16.1%) victims. The remaining 4107 victims constituted the controls. The FFx group demonstrated higher ISS (median 48 vs 36, p < 0.001) and shorter post-injury survival times (median 60 vs 85 min, p < 0.001). Presence of bilateral fractures (15.5%) potentiated this effect (median ISS 50 vs 43, p = 0.006; median survival time 40 vs 65, p = 0.0025; compared to unilateral fractures). Statistically significant associations of FFx were identified with AIS2-5 thoracic trauma (OR 1.43), AIS2-5 abdominal visceral injuries (OR 1.89), AIS1-3 skeletal injuries of the upper (OR 2.7) and lower limbs (OR 3.99) and AIS2-5 of the pelvis (OR 2.75) (p < 0.001). In the FFx group, 218 (27.7%) victims survived past the emergency department and 116 (53.2%) underwent at least one surgical procedure. Complications occurred in 45.4% of hospitalized victims, the most common being pneumonia (34.8%). CONCLUSION: This study has documented that femoral fractures are associated with increased severity of injury, shorter survival times and higher incidence of associated thoracic, abdominal and skeletal extremity injuries, compared to controls. These findings should be considered for an evidence-based upgrading of trauma care.

The "misfortune" of being a COVID-19 negative patient during the coronavirus pandemic.

COVID-19 pandemic has obviously affected patients' behavior towards seeking medical help as well as physicians' decision in the management of emergencies. Our recent experience as surgeons at a COVID-19 referral hospital revealed cases which share an alerting characteristic: the delay in appropriate management. Unfortunately for COVID-19 negative patients a "coronacentric" health system has been adopted. In view of measures applied to avoid spread of the disease, a significant delay in patients' presentation as well as in their in-hospital management is observed. We present cases where delay in appropriate management affected the patients' outcome and underline the fact that balancing between COVID-19 safety measures and a patient who needs urgent treatment can be very challenging and stressful.

Comparison of Quality of Life before and after pancreaticoduodenectomy: a prospective study.

BACKGROUND: Pancreatic cancer is an aggressive malignancy, and surgical resection is the only therapeutic option with pancreaticoduodenectomy being considered the standard of care. It is essential to take into account the patients' Quality of Life after the resection, in order to make more informed decisions about treatment options. OBJECTIVE: The aim of the study was to determine perceived Quality of Life levels among patients who undergo pancreaticoduodenectomy, in a period of six months after surgery. METHODS: This prospective study was conducted on all patients (n=40) who underwent pancreaticoduodenectomy in Attikon University General Hospital in Athens, Greece, from January 2013 to June 2015. The Quality of Life was assessed by use of EORTC QLQ-C30 and EORTC QOL-PAN26 questionnaires at four phases: First, after admission at the hospital preoperatively, and then one month, three months, and six months postoperatively. Repeated measurements analysis of variance (ANOVA) was used in order to evaluate changes in Quality of Life measures during the follow-up (postoperative) period. Data analysis was conducted using SPSS version 19. A p-value of less than or equal to 0.05 was set as the level of significance. RESULTS: The study revealed a mixed image. Except for the nausea and vomiting scale, where indeed a symptom increase is initially reported and then gradually decreases below preoperative levels by 6 months, scoring in many symptom scales worsens postoperatively. From first to fourth assessment, fatigue (Mean from 23.61 to 38.72, p=0.005) and financial difficulties scoring (Mean from 5.98 to 42.42, p<0.001) consistently worsen. Functionality scales scoring also tends to get worse between first and fourth assessment, with statistically significant changes for physical (p<0.001), role (p<0.001) and social functioning (p<0.001). However, a slight improvement can be noted in many scales from third to fourth assessment, as in diarrhea (Mean from 32.38 to 29.29), pancreatic pain (Mean from 17.71 to 2.34), global health status (Mean from 50.48 to 52.53) and social functioning (Mean from 43.81 to 48.48) scales. CONCLUSIONS: Quality of Life levels among patients who undergo pancreaticoduodenectomy are getting worse following surgery. However, the longitudinal study of these changes may improve patients' postoperative life by formulating evidence-based interventions concerning symptoms treatment and psychological and social support.

Assessment of Aesthetic Results of 100 Patients Who Underwent Rhinoplasty-Rhinoplasty Outcome Evaluation.

BACKGROUND: To assess the long-term aesthetic results of rhinoplasty and predict the final outcome. METHODS: The sample was composed of 100 patients (34 men and 66 women) between 23 and 57 years old (mean, 34.8) operated on exclusively for aesthetic reasons. The time elapsed from the operation ranged from 3 to 13 years with a mean of 6.8 years. The study used Rhinoplasty Outcome Evaluation questionnaire, a simple, reliable, validated, and widely used inventory. RESULTS: The vast majority of patients (93%) were satisfied postoperatively with scores > 50% (67 patients had scores > 80%). Only 7 patients had scores less than 50%. The mean score was 82.4 ± 1.7% with a median of 87%. In addition, it seems that the results of the operation remain high through time with a small decline along age groups and years elapsed. Women were found more satisfied than men (P = 0.03). CONCLUSIONS: The study concludes that the results of aesthetic rhinoplasty, if performed by skilled and experienced surgeons, are very satisfying and stable throughout time.

The role of surgery in the therapeutic approach of gastric cancer liver metastases.

Gastric cancer (GC) currently prevails as the second cause of death by malignancy worldwide. Estimations suggest that 35 % of affected patients appear with synchronous distant metastases. The vast majority of patients present with hepatic metastatic disease, sometimes accompanied by synchronous peritoneal and lung dissemination. The disease mostly remains asymptomatic at an early stage, with few reported cases of incidental abdominal discomfort. As the cancer advances, symptoms such as nausea or vomiting arise, along with indigestion and dysphagia, blood loss in the form of melena or hematemesis, as well as anorexia and weight loss. Having spread to the liver, it also causes jaundice due to hepatomegaly and general inanition. Despite recent research on the therapeutic strategies against GC metastatic disease, surgical resection appears the only potentially curative approach. Unfortunately, the majority of patients are not eligible to undergo surgical intervention. With regard to treatment modalities of the advanced stage disease, the role of metastasectomy is still debatable and quite unclear, while prolonged survival was succeeded only under certain specific circumstances. Systemic chemotherapy remains however another option, as well as local management in the form of cryotherapy, radiofrequency ablation, or transcatheter arterial chemoembolization. The aims of this review were to evaluate the results of surgical treatment for metastatic GC with special reference to the extent of its histological spread and to present the recent literature in order to provide an update on the current concepts of advanced surgical management of this entity. Relevant publications in the last two decades are briefly reviewed.

Cost-Effective Surgical Management of Liver Disease Amidst a Financial Crisis.

BACKGROUND: Intraoperative use of specialized equipment and disposables contributes to the increasing cost of modern liver surgery. As a response to the recent severe financial crisis in our country we have employed a highly standardized protocol of liver resection that minimizes intraoperative and postoperative costs. Our goal is to evaluate cost-effectiveness of this protocol. STUDY DESIGN: We evaluated retrospectively all patients who underwent open hepatic resections for 4 years. All resections were performed by the same surgical team under selective hepatic vascular exclusion, i.e., occlusion of the hepatoduodenal ligament and the major hepatic veins, occasionally combined with extrahepatic ligation of the ipsilateral portal vein. Sharp parenchymal transection was performed with a scalpel and hemostasis was achieved with sutures without the use of energy devices. In each case we performed a detailed analysis of costs and surgical outcomes. RESULTS: Our cohort included 146 patients (median age 63 years). 113 patients were operated for primary or metastatic malignancies and 33 for benign lesions. Operating time was 121 ± 21 min (mean ± SD), estimated blood loss was 310 ± 159 ml (mean ± SD), and hospital stay was 7 ± 5 days (mean ± SD). Six patients required admission in the ICU postoperatively. 90-day mortality was 2.74 %, and 8.9 % of patients developed grade III/IV postoperative complications (Clavien-Dindo classification). Total in-hospital cost excluding physician fees was 6987.63 ± 3838.51 USD (mean ± SD). CONCLUSIONS: Our analysis suggests that, under pressing economic conditions, the proposed surgical protocol can significantly lessen the financial burden of liver surgery without compromising patient outcomes.

Mesenteric ischemia: Pathogenesis and challenging diagnostic and therapeutic modalities.

Mesenteric ischemia (MI) is an uncommon medical condition with high mortality rates. ΜΙ includes inadequate blood supply, inflammatory injury and eventually necrosis of the bowel wall. The disease can be divided into acute and chronic MI (CMI), with the first being subdivided into four categories. Therefore, acute MI (AMI) can occur as a result of arterial embolism, arterial thrombosis, mesenteric venous thrombosis and non-occlusive causes. Bowel damage is in proportion to the mesenteric blood flow decrease and may vary from minimum lesions, due to reversible ischemia, to transmural injury, with subsequent necrosis and perforation. CMI is associated to diffuse atherosclerotic disease in more than 95% of cases, with all major mesenteric arteries presenting stenosis or occlusion. Because of a lack of specific signs or due to its sometime quiet presentation, this condition is frequently diagnosed only at an advanced stage. Computed tomography (CT) imaging and CT angiography contribute to differential diagnosis and management of AMI. Angiography is also the criterion standard for CMI, with mesenteric duplex ultrasonography and magnetic resonance angiography also being of great importance. Therapeutic approach of MI includes both medical and surgical treatment. Surgical procedures include restoration of the blood flow with arteriotomy, endarterectomy or anterograde bypass, while resection of necrotic bowel is always implemented. The aim of this review was to evaluate the results of surgical treatment for MI and to present the recent literature in order to provide an update on the current concepts of surgical management of the disease. Mesh words selected include MI, diagnostic approach and therapeutic management.

Metastatic Liver Disease Associated with Gastrointestinal Stromal Tumors: Controversies in Diagnostic and Therapeutic Approach.

BACKGROUND: Gastrointestinal stromal tumors (GISTs) are the most frequent mesenchymal lesions of the GI tract. They are considered to originate from neoplastic transformation of either the intestinal pacemaker cells of Cajal or the precursor pluripotential stem cells. The genetic basis of GIST growth is an activating mutation of two receptor tyrosine kinases. Recent epidemiologic studies demonstrate that the GIST prevalence is approximately 20/1000000/year. Although GISTs develop in every part of the GI tract, stomach remains the most common localization. About 80 % of the patients experience tumor recurrence or hepatic metastasis after radical resection. GIST liver metastases are usually multiple, large in diameter, and localized in both lobes. In addition, GISTs are usually completely asymptomatic, discovered incidentally. Symptoms are not typical and depend on the location, size, and aggressiveness of the tumor. DISCUSSION: Diagnostic evaluation is based on imaging techniques, such as computed tomography, magnetic resonance imaging, positron emission tomography, and endoscopic ultrasound. Despite recent research on the therapeutic strategies against GISTs, surgical resection appears the only potentially curative approach. For the advanced metastatic disease, imatinib, a tyrosine kinase inhibitor, has been proposed neoadjuvantly with the surgery performed after the adequate reduction of tumor burden. The aim of this review was to evaluate the results of surgical treatment for metastatic GIST with special reference to the extent of its histological spread and to present the recent literature in order to provide an update on the current concepts of advanced surgical management of this entity.

Challenging diagnostic and therapeutic modalities for leiomyosarcoma of inferior vena cava.

Leiomyosarcoma of the inferior vena cava (IVCL) is a rare malignant tumour originating from the smooth muscle cells of the media with intra- or extra-luminal growth. The type of the lesion is further divided into three levels in relation to hepatic and renal veins respectively. The aim of this review was to evaluate the results of surgical treatment of IVCL with special reference to the extent of its histological spread and to analyse the recent literature in order to provide an update on the current concepts of diagnostic and therapeutic management of this entity. IVCL's patients may present with non-specific complaints such as dyspnoea, malaise, weight loss, nausea, vomiting, fever and abdominal pain. Haematogenous metastasis is frequent. At a later stage, IVCL may also spread through lymphatic. Multiple diagnostic imaging techniques have been proposed for accurate preoperative diagnosis, including Doppler ultrasonography (US), computed tomography (CT) and magnetic resonance imaging (MRI), individually or in combination with cavography echocardiography or CT-guided biopsy. Despite recent research on the therapeutic strategies against IVCL, surgical resection appears the only potentially curative approach. Unfortunately, a mere minority of patients is eligible to undergo surgical intervention. In addition, surgical removal of IVCL does not necessarily guarantee patient's long-term survival. Alternative therapies, such as radio- and chemo-therapy often proved insufficient. Debate continues regarding the optimal management of the IVC after tumour resection, with primary repair, ligation and IVC reconstruction all have been utilized with varying success.

Quality of Life Variables Assessment, Before and After Pancreatoduodenectomy (PD): Prospective Study.

INTRODUCTION: The treatment of pancreatic cancer is a complex problem, due to late diagnosis, the need for specialized surgical treatment, the large number of relapses and poor survival. OBJECTIVE: To evaluate the quality of life of patients with periampulary pancreatic cancer before and after pancreatoduodenectomy (PD). MATERIAL & METHOD: The sample was collected in the "Attikon" University General Hospital (Chaidari). It consists of 20 subjects with a mean age of 65.9 years (SD = 10,2 years). For the quality of life measurement, we used the (EORTC) QLQ-C30 version 3.0., as well as the EORTC QOL-PAN26. RESULTS: From the sample of 20 patients who participated, full data were collected for 18 of them during the first month, 17 during the third month and 16 during the sixth month.Regarding symptoms, as they were recorded with the QLQ-30 questionnaire, there was a significant increase of fatigue, a significant reduction of pain and constipation, while economic difficulties increased.  As for the mean and median values for the dimensions of the PAN-26 questionnaire during monitoring, there was a significant decrease in pancreatic and liver pain symptoms during follow-up, while the gastrointestinal symptoms increased in frequency. In addition, the body image and sexuality worsened. CONCLUSIONS: The surgical treatment of pancreatic cancer with pancreatoduodenectomy (PD), according to the early survey data using the (EORTC) QLQ-C30 version3.0, and the EORTC QOL-PAN26 questionnaires, seems to have a favorable impact on quality of life, as evidenced by the improvement of most parameters evaluated during the study period.

Primary hepatic lymphoma: dilemmas in diagnostic approach and therapeutic management.

Primary hepatic lymphoma (PHL) is a very rare malignancy and is characterized by liver involvement at presentation with no affectation of the spleen, lymph nodes, peripheral blood, bone marrow, or other tissues until at least 6 months after diagnosis. PHL should be considered in the differential diagnosis in a patient with space-occupying liver lesions and normal levels of alpha-fetoprotein and CEA. A computed tomography (CT) scan is the commonly used modality for staging lymphomas. The widespread use of positron emission tomography/CT results in the improvement in the accuracy of detecting the extent of disease, response evaluation, and prognostication. The liver biopsy, due to its pleomorphic appearances in the needle biopsy specimen, can be very challenging. Current literature favors the combination of chemotherapy as the frontline treatment for its least invasiveness and improved survival. Favorable prognosis of PHL can be obtained by early surgery combined with chemotherapy in strictly selected patients. However, the optimal therapy is still unclear and the outcomes are uncertain.

Familial pancreatic cancer: challenging diagnostic approach and therapeutic management.

BACKGROUND: Familial predisposition characterizes up to 10% of the patients with pancreatic cancer (PC). Although many syndromes have been associated with an increased risk for PC, familial pancreatic cancer (FPC) accounts for the majority of hereditary cases. FPC is defined by families with at least a pair of first-degree relatives (FDRs) who have been diagnosed with PC and do not fulfill the criteria of other inherited tumor syndromes. METHODS AND RESULTS: Genetic counseling is of great importance to estimate the prevalence and recommend further molecular testing. Regarding the screening program for individuals with increased risk for PC, a consortium summit stated that candidates for screening are FDRs of patients with PC from a familial kindred with at least two affected FDRs, patients with Peutz-Jeghers syndrome and p16, BRCA2, and hereditary nonpolyposis colorectal cancer (HNPCC) mutation carriers. It was also agreed that initial screening should include endoscopic ultrasonography (EUS) and/or magnetic resonance imaging (MRI)/magnetic resonance cholangiopancreatography (MRCP) instead of computed tomography (CT) or endoscopic retrograde cholangiopancreatography (ERCP). CONCLUSIONS: However, the optimal age of initial screening remains undefined. Furthermore, a multidisciplinary assessment is required to determine whether surgical interventions should be performed at high-volume specialty centers. The aim of this study is to collect all the recent information considering the genetic basis, screening protocols, and treatment of FPC in order to provide an update on the current contemporary concepts of therapeutic management of the disease.

Outcome following major hepatic resection in the elderly patients.

Recent advances in operative techniques, anaesthesiologic management and intensive care have greatly reduced morbidity and mortality of major hepatectomy allowing a progressive broadening of its indications by including patients with chronic liver disorders as well as elderly subjects. It is apparent that with the aging population, more elderly patients are being referred for surgery. Selecting appropriate candidates for surgical resection is therefore crucial to maximize the benefit derived from surgery. Nevertheless, it is not clear whether advanced age itself increases surgical risk or additional age-independent variables are associated with higher operative morbidity. Regardless of the indications for surgery and the extent of planned liver resections, this population is more likely to suffer from relevant disorders. Previous studies on the safety of major liver resections in the elderly patients cite morbidity and mortality rates of approximately 30-40% and 4-5% respectively. In addition, hepatic resections for hepatocellular carcinoma or colorectal liver metastases have been reported as safe in the elderly as in the younger population. Nevertheless, a small number of investigations studied the outcome of major hepatectomy in the population over 70 years of age. The aim of our study was to evaluate overall experience with liver resections in the elderly population by comparing the early as well as the long-term outcome of the procedure in 70 years and older versus the less than 70 age group and to identify whether the age of patients alone is associated with increased rate and severity of postoperative complications.

Hereditary pancreatitis: dilemmas in differential diagnosis and therapeutic approach.

INTRODUCTION: Hereditary pancreatitis (HP) is a rare, heterogeneous familial disease and should be suspected in any patient who has suffered at least two attacks of acute pancreatitis for which there is no underlying cause and unexplained chronic pancreatitis with a family history in a first- or second-degree relative. Genetic factors have been implied in cases of familial chronic pancreatitis. The most common PRSS1 mutations worldwide are the R122H and N29I variants. CLINICAL FEATURES: HP usually appears with an acute, a recurrent acute, and a chronic phase, referring to the inflammation of the pancreas and the symptoms' onset and duration. The clinical features of acute pancreatitis begin in childhood and last less than 6 months. HP carries a 50-70-fold increased risk of pancreatic cancer within 7-30 years of disease onset. HP diagnosis is defined by the presence of a detected cationic trypsinogen gene mutation (with or without clinical or radiological manifestations of chronic pancreatitis) or when the patient's family satisfies the requirements of the EUROPAC. TREATMENT: With regard to the therapeutic approach, pancreatic enzyme replacement therapy and analgesics are offered to control pain. In addition, endoscopic and surgical intersections are reserved for all relevant complications. Unfortunately, surgical removal of affected pancreatic tissue does not necessarily guarantee the patient's long-term survival. Furthermore, the prognostic factors and the efficacy of extended resection remain controversial.

Retroperitoneal schwannomas: dilemmas in diagnostic approach and therapeutic management.

INTRODUCTION: Schwannomas are rare tumors arising from Schwan cells of the peripheral nerve sheath. The majority of the cases are sporadic and familial clustering is often observed in association with von Rechlinghausen's disease. Cases of intrasacral (osseous) and spinal tumors have also been described. Histologically, schwannomas are distinguished by the presence of areas of high and low cellularity called Antoni A and B tissue, respectively. CLINICAL PRESENTATION: Clinical features are highly non-specific and depend on the location and size of the lesion, with abdominal pain and neurological deficit being the most common abnormalities. Radiological studies are fundamental in the diagnostic evaluation of RSs. THERAPEUTIC MANAGEMENT: Despite recent research on the therapeutic strategies against RS, surgical resection appears the only potentially curative approach. Unfortunately, a mere minority of patients is eligible to undergo surgical intervention. In addition, surgical removal of RS does not necessarily guarantee patient's long-term survival. Laparoscopic approach and enucleation of the tumor have been suggested as well. Alternative therapies, such as radio- and chemotherapy often proved insufficient. The aim of this review was to evaluate the results of surgical treatment for RS with special reference to the extent of its histological spread and to analyze the recent literature in order to provide an update on the current concepts of therapeutic management of this entity.