Antonios Vezakis

Influence of juxtapapillary diverticula on the success or difficulty of cannulation and complication rate

BACKGROUND Periampullary diverticula (PAD) are found in 9% to 32% of patients who undergo an ERCP. Published studies confer conflicting results regarding the true impact of PAD on the technical success and complications of ERCP. OBJECTIVE The aim of the study was to investigate and compare success rate, difficulty at cannulation, and complications between patients with and without PAD, as well as to identify independent factors that influence the difficulty at cannulation. DESIGN A prospective study. SETTING Tzaneio General Hospital. PATIENTS A total of 601 consecutive patients who underwent an ERCP were divided into 2 groups according to the presence (group A, 117 patients) or absence (group B, 484 patients) of PAD. Patients with undetectable papilla were excluded from the study cohort. The incidence of undetectable papilla was 8.3% in patients with duodenal diverticula and 0.9% in patients without duodenal diverticula (P = .000). RESULTS Successful cannulation was achieved in up to 94.9% and 94.8% in groups A and B, respectively. The effort and difficulty at attempting this goal was different between the groups (43.5% vs 59.1%, P = .003), because patients without PAD were subjected to more vigorous attempts or even the pre-cut technique to attain a cholangiogram. There was no significant difference between the groups in the complication rate either in total or in any particular patient. Multivariate logistic regression analysis showed 3 of the variables, namely choledocholithiasis, abnormal papilla, and the presence of diverticula, remained significant, and all of them presented with odds ratios indicating an easier cannulation attempt. LIMITATION A nonrandomized study. CONCLUSIONS The finding of a periampullary diverticulum during an ERCP should not be considered an obstacle to a successful cannulation and, furthermore, may be an indicator of an easier cannulation attempt, provided that the papilla can be found with confidence. Concerns about increased complications are not substantiated in this study.

Closure of a persistent sphincterotomy-related duodenal perforation by placement of a covered self-expandable metallic biliary stent

Retroperitoneal duodenal perforation as a result of endoscopic biliary sphincterotomy is a rare complication, but it is associated with a relatively high mortality risk, if left untreated. Recently, several endoscopic techniques have been described to close a variety of perforations. In this case report, we describe the closure of a persistent sphincterotomy-related duodenal perforation by using a covered self-expandable metallic biliary (CEMB) stent. A 61-year-old Greek woman underwent an endoscopic retrograde cholangiopancreatography (ERCP) and sphincterotomy for suspected choledocholithiasis, and a retroperitoneal duodenal perforation (sphincterotomy-related) occurred. Despite initial conservative management, the patient underwent a laparotomy and drainage of the retroperitoneal space. After that, a high volume duodenal fistula developed. Six weeks after the initial ERCP, the patient underwent a repeat endoscopy and placement of a CEMB stent with an indwelling nasobiliary drain. The fistula healed completely and the stent was removed two weeks later. We suggest the transient use of CEMB stents for the closure of sphincterotomy-related duodenal perforations. They can be placed either during the initial ERCP or even later if there is radiographic or clinical evidence that the leakage persists.

A tailored approach to the management of perforations following endoscopic retrograde cholangiopancreatography and sphincterotomy.

BackgroundThe management of endoscopic retrograde cholangiopancreatography (ERCP)-related perforations remains controversial. Τhe aim of the study was to determine the incidence of perforations following ERCP, their characteristics, operative and non-operative management options and clinical outcome.MethodsA retrospective review of ERCP-related perforations, during a 21-year period, was performed. Each perforation was categorized into types I to IV according to the location, mechanism and radiographic evaluation of the injury. Comparisons were made between patients treated operatively and non-operatively.ResultsForty-four perforations (0.4%) occurred in 9,880 procedures. They were mainly caused by the passage of the endoscope (type I) in 7 (16%) and sphincterotomy (type II) in 30 (68%) patients. The management was non-operative in 32 (72%) and operative in 12 patients. In multivariate analysis, only the type of perforation (type I: endoscope-related) was found significant for predicting operative treatment. The hospital stay was longer for patients requiring an operation (median, 24 vs 9 days). The overall mortality was 2/44 (4.5%). There was no death in the non-operative group.ConclusionsThe need for immediate operative intervention should be based on the type of injury and clinical findings. Patients with type I perforations should be treated surgically and primary repair should be tried. Patients with type II injuries may be treated initially non-operatively. Delayed operative intervention will be required in a minority of these patients.

Two Cases of Primary Splenic Hydatid Cyst in Greece

Cystic disease of the spleen is an uncommon entity in general population. Most cases result from parasitic infection by Echinococcus granulosus, a form called splenic hydatid disease (SHD), with a reported frequency of 0.5-6.0% within abdominal hydatidosis. On the contrary, an isolated splenic involvement of hydatid disease is very uncommon even in endemic regions. Two cases of primary SHD managed with open and laparoscopic radical surgery in our department are reported herein. Primary SHD is a rare entity with non-specific symptoms underlying clinical suspicion by the physician for prompt diagnosis. Surgical treatment is the mainstay therapy, while laparoscopic approach when feasible is safe, offering the advantages of laparoscopic surgery.

Seronegative cat-scratch disease diagnosed by PCR detection of Bartonella henselae DNA in lymph node samples

Cat scratch disease (CSD), the typical clinical manifestation of Bartonella infections usually follows a typical benign self-limited course. Nevertheless, a variety of unusual clinical manifestations and confusing imaging features can lead to misinterpretations and render the disease a diagnostic dispute. Routine laboratory tests exhibit varying reported sensitivity and are usually unhelpful in diagnosis, as serology fails in terms of specificity and/or sensitivity. Herein we report a case of seronegative Bartonella infection presenting as symptomatic suppurative lymphadenitis with abscess formation, which was surgically drained. Diagnosis was established by PCR analysis from lymph nodes samples obtained during the procedure. PCR detection of specific DNA fragments from lymph node biopsy provides a sensitive detection of disease. The technique should be considered for patients with suspected CSD and negative serology, since serological assays exhibit low sensitivity. In ambiguous cases, surgical exploration may provide tissue for diagnosis; it is well tolerated and affords improved recovery.

The contribution of long non-coding RNAs in Inflammatory Bowel Diseases

Inflammatory bowel diseases (IBDs) are multifactorial autoimmune diseases with growing prevalence but the interaction between genetic, environmental and immunologic factors in their development is complex and remains obscure. There is great need to understand their pathogenetic mechanisms and evolve diagnostic and therapeutic tools. Long non-coding RNAs (lncRNAs) are RNA molecules longer than 200 nucleotides that are known to interfere in gene regulation but their roles and functions have not yet been fully understood. While they are widely investigated in cancers, little is known about their contribution in other diseases. There is growing evidence that lncRNAs play critical role in regulation of immune system and that they interfere in the pathogenetic mechanisms of autoimmune diseases, like IBDs. Recent studies have identified lncRNAs in the proximity of IBD-associated genes and single nucleotide polymorphisms within IBD-associated lncRNAs as well. Furthermore, blood samples and pinch biopsies were also analyzed and a plethora of lncRNAs are found to be deregulated in Crohns disease (CD), Ulcerative colitis (UC) or both. (Especially in UC samples the lncRNAs INFG-AS1 and BC012900 were found to be significantly up-regulated. Similarly, ANRIL, a lncRNA that nest different disease associated SNPs, is significantly down-regulated in inflamed IBD tissue.) This review aims at recording for the first time recent data about lncRNAs found to be deregulated in IBDs and discussing suggestive pathogenetic mechanisms and future use of lncRNAs as biomarkers.

Methods of safe laparoscopic cholecystectomy for left-sided (sinistroposition) gallbladder: A report of two cases and a review of safe techniques

INTRODUCTION Left-sided gallbladder is a rare anatomical variation. Usually it is discovered intra-operatively and is accompanied by anatomic variations that can prove quite challenging during laparoscopy. PRESENTATION OF CASE From a total of almost 3000 laparoscopic cholecystectomies performed in our institution, two cases of left sided gallbladder were unexpectantly identified intraoperatively. There were no indications for the ectopy preoperatively. In both cases modifications of the standard laparoscopic technique were mandatory. They were performed safely with no post-operative complications. Modifications consisted of transposition of the subxiphoid entry port and alteration in the direction of traction of the rest of the graspers. A review of the literature for methods of safe laparoscopic cholecystectomy was conducted. DISCUSSION The surgeon must be aware of the anatomic variances in the rare occasion of a left sided gallbladder, since preoperative diagnosis is very difficult. CONCLUSION Knowledge of potential hazards and modifications of laparoscopic technique is mandatory in order to avoid complications.

Effects of endoscopic sphincterotomy on biliary epithelium: A case-control study

AIM To study the long-term effects of endoscopic sphincterotomy on biliary epithelium. METHODS This is a prospective case-control study. A total of 25 patients with a median age of 71 years (range 49-89 years) and prior endoscopic sphincterotomy (ES) for benign disease formed the first group. The median time from ES was 42 mo (range 8-144 mo). Another 25 patients with a median age of 76 years (range 44-94 mo) and similar characteristics who underwent current endoscopic retrograde cholangiopancreatography (ERCP) and ES for benign disease formed the second group (control group). Brush cytology of the biliary tree with p53 immunocytology was performed in all patients of both groups. ERCPs and recruitment were conducted at the Endoscopic Unit of Aretaieion University Hospital and Tzaneio Hospital, Athens, from October 2006 to June 2010. RESULTS No cases were positive or suspicious for malignancy. Epithelial atypia was higher in the first group (32% vs. 8% in the second group, P = 0.034). Acute cholangitis and previous biliary operation rates were also higher in the first group (acute cholangitis, 60% vs. 24% in the second group, P = 0.01; previous biliary operation, 76% vs. 24% in the second group, P = 0.001). Subgroup analysis showed that previous ES was the main causal factor for atypia, which was not related to the time interval from the ES (P = 0.407). Two patients (8%) with atypia in the first group were p53-positive. CONCLUSION ES causes biliary epithelial atypia that represents mostly reactive/proliferative rather than premalignant changes. The role of p53 immunoreactivity in biliary atypia needs to be further studied.

Merkel cell carcinoma of unknown primary site; case presentation and review of the literature.

Merkel cell carcinoma (MCC) is a rare skin malignancy associated with sun exposure and considered as a Neuroendocrine Tumor due to its characteristic histologic features. However there is increasing number of reports of Unknown Primary MCCs (UPMCC). Although initially UPMCC was considered a variant of known primary MCC, there is growing evidence that it could represent a different clinical entity. We present the case of a 60 year-old male patient who was referred to our department for surgical management of lymph node disease for UPMCC. The patient had undergone excisional biopsy of an inguinal lump, which was found to be an infiltrated lymph node by MCC. The patient underwent full imaging staging including a PET/CT, which failed to identify a primary site, and revealed only intra-abdominal lymph node disease. The patient underwent extended retroperitoneal and inguinal lymph node dissection and remains free of recurrence 16 months postoperatively.

Diagnostic and Therapeutic Challenges of Intrahepatic Biliary Cystadenoma and Cystadenocarcinoma: A Report of 10 Cases and Review of the Literature.

The objective of this study was to present our experience with intrahepatic biliary cystadenomas and cystadenocarcinomas in 10 patients surgically managed in our department. Intrahepatic biliary cystadenomas and cystadenocarcinomas are rare cystic tumors that are often misdiagnosed preoperatively as simple cysts or hydatid cysts. They recur after incomplete resection and entail a risk of malignant transformation to cystadenocarcinoma. A retrospective review was conducted of patients with histologically confirmed intrahepatic biliary cystadenomas and cystadenocarcinomas between August 2004 and February 2013 who were surgically managed in our department. A total of 10 patients, 9 female and 1 male (mean age, 50 years), with cystic liver were reviewed. The size of the cysts ranged between 3.5 and 16 cm (mean, 10.6). Five patients had undergone previous interventions elsewhere and presented with recurrences. Liver resections included 6 hepatectomies, 2 bisegmentectomies, 1 extended right hepatectomy, and 1 enucleation due to the central position and the large size of the lesion. Pathology reports confirmed R0 resections in all cases. All patients were alive after a median follow-up of 6 years (range, 1-10 years), and no recurrence was detected. Intrahepatic biliary cystadenoma and cystadenocarcinoma should be considered in differential diagnosis in patients with liver cystic tumors. Because of the high recurrence rate and difficult accurate preoperative diagnosis, formal liver resection is mandatory. Enucleation with free margins is an option and is indicated where resection is impossible.