Uluslararası Yayınlar, Kongre Bildirileri, Kitaplar-Tezler
Pancreatic lipomatosis is characterized as massive lipid infiltration of the pancreatic tissue. Although its etiology is ill defined; obesity, diabetes mellitus, chronic pancreatitis, hereditary pancreatitis, and conditions that cause pancreatic ductal obstruction, for example tumors and stones, are related to its pathogenesis. Recently, with the increased use of computerized tomography and magnetic resonance imaging, it has become possible to observe the fat replacement of the pancreas. Herein, we report a 60-year-old man complaining of abdominal pain and weight loss. Preoperative work-up revealed a locally advanced (Stage III) pancreatic adenocarcinoma. Multimodal treatment was carried out and a 100% complete response was detected after neoadjuvant therapy. The patient underwent a standard pancreaticoduodenectomy, without complications. The tissue pathology revealed lipomatosis of the pancreas. He was disease-free and symptom-free at 1 year follow-up. To our knowledge, this is the first report in the literature of pancreatic head carcinoma with total fat replacement of the pancreas after neoadjuvant chemoradiotherapy.
Xanthogranulomatosis is an idiopathic, rare process in which lipid-laden histiocytes are deposited at various locations in the body. We present two cases who were treated by duodenum-preserving pancreatic head resection and eventually diagnosed as having xanthogranulomatous pancreatitis. A 30-year-old caucasian man was admitted to our clinic for vague abdominal pain and epigastric dullness. Magnetic resonance cholangiopancreatography and endoscopic retrograde pancreatography suggested the existence of chronic pancreatitis. Another 34-year-old caucasian woman was admitted to our clinic because of right upper quadrant pain. Magnetic resonance cholangiopancreatography demonstrated a dilatation and stone of the main pancreatic duct. Based on a diagnosis of chronic pancreatitis, pancreatic head resection was planned and a laparotomy was performed in both of cases. In both cases, duodenum-preserving pancreatic head resection was performed. Macroscopic and microscopic findings revealed xanthogranulomatous inflammation, which led to a diagnosis of xanthogranulomatous pancreatitis. Although this type of pancreatitis is extremely rare, it is important to keep it in mind for a differential diagnosis because it may simulate chronic pancreatitis or a malignant tumor on imaging.
Intrahepatic cholangiocarcinoma is subdivided as mass-forming, periductal-infiltrating, and intraductal-growing types. Intraductal-growing type is an entity described in recent years as mucin-producing intrahepatic cholangiocarcinoma or intrahepatic (biliary) intraductal papillary mucinous neoplasia (b-IPMN). b-IPMN is classified as adenoma, borderline tumor, carcinoma in situ, and carcinoma, from benign to malignant. Using a different classification, b-IPMNs are subdivided into intestinal, pancreatobiliary, gastric, or oncocytic based on morphology of the cells forming the lesion and expression of MUC1, MUC2, and MUC5 gene proteins in the mucin family. The clinical and histopathological features of b-IPMN diagnosed in three cases are presented herein. Case 1 was classified as borderline. Case 2 was diagnosed as carcinoma in situ. Case 3 had large invasive areas, and was diagnosed as carcinoma. In all three cases, immunohistochemical investigation revealed MUC1 and MUC5AC to be positive, and MUC2 to be negative. We present herein three cases diagnosed with the clinical and pathological findings of a new entity in the literature, b-IPMN, and we discuss the macroscopic, histological, and immunohistochemical features.
Background/Purpose Portal vein embolization is used in the treatment of hepatocellular cancer, with the purpose of enhancing resectability. However, regeneration is restricted due to hepatocellular injury following chemotherapeutics (e.g. doxorubicin). The aim of this study was to investigate whether hyperbaric oxygenation (HBO) can alleviate the hepatotoxicity of chemotherapy and improve regeneration in the injured liver. Methods Rats were allocated to four experimental groups. Group I rats were subjected to right portal vein ligation (RPVL); rats in groups II and III were administered doxorubicin prior to RPVL, with group III rats being additionally exposed to HBO sessions postoperatively; group IV rats was sham-operated. All rats were sacrificed on postoperative day 7, and liver injury was assessed by measuring alanine aminotransferase (ALT) and aspartate aminotransferase (AST) levels. Protein synthetic ability was determined based albumin levels and liver regeneration by the mitotic index (MI). Results The AST and ALT values of group II rats were significantly higher than those of group I, but not those of group III. Rats treated with doxorubicin and HBO (groups II and III) showed slightly but not significant differences in albumin levels than those subjected to only RPVL or sham-operated. The MI was significantly increased in groups I, II, and III, with the MI of group III rats significantly higher than those of group I rats. Conclusions Based on our results, we conclude that HBO treatment has the potential to diminish doxorubicin-related hepatotoxicity and improve regeneration in the injured liver.
Background: Matrix metalloproteinases (MMP) modulate end-organ complications of acute pancreatitis, but the correlation between increased MMP production and histological severity of disease remains unclear. We examined the role of MMP and pancreas histology on experimental acute pancreatitis.Methods: Forty male Wistar albino rats were subjected to cerulein-induced pancreatitis (8, 16, 24 and 32 h groups) or sham treatment. The animals were killed at different time points and pancreatic tissues were harvested to assess MMP (1, 2 and 9) activity and inflammatory changes.Results: Compared with other groups, 8 h group had decreased tissue MMP-1 concentrations. MMP-9 concentrations were lower in 24-h and 32-h groups, as were histological severity scores. MMP-2 activity did not differ among groups. Pancreatitis was prominent in 8-h, 16-h and 24-h groups by means of histology.Conclusion: Induction of pancreatitis by cerulein altered pancreatic MMP levels in the early phase of inflammation. Inhibition of MMP-2 and MMP-9 paralleled histological scores. Therefore, MMP may have a predictive value to assess histological severity.
Mirizzi's syndrome is a rare complication of long-standing cholelithiasis. Many surgical approaches of varying complexity have been advocated for treatment. However, the distorted extrahepatic biliary anatomy continues to be threatening, with a high risk of biliary complications. Presented here is a series of 25 patients with Mirizzi's syndrome who were treated at the Dokuz Eylul University Hospital since 1985. Type I lesion (without cholecystocholedochal fistula) was encountered in 11 patients, while the remaining 14 had type II lesions (with cholecystocholedochal fistula). Preoperative diagnoses were made in 14 of the 25 patients (56%). Follow-up in 17 patients ranged from 1 to 96 months (mean, 40 months). Unfortunately, the remaining 8 patients were lost to follow-up after discharge. The morbidity rate in our series was 32%, while no mortality was encountered. During long-term follow-up, no biliary stricture was diagnosed. Following an uneventful postoperative course, all of our patients are symptom-free and doing well, with normal liver function. We conclude that partial cholecystectomy alone is a safe and sound surgical approach for the treatment of type I lesions. For type II lesions, depending on the size of the fistula, either primary closure over a T-tube, or bilio-digestive anastomosis, preferably Roux-en-Y, can be an appropriate treatment modality, with a low morbidity rate.