Publications by authors named "Marcos Gelos"

An effective biological marker for pancreatic adenocarcinoma (PAC) is not available so far. Here, we investigate how electron paramagnetic resonance (EPR) spectroscopy of spin-labeled fatty acid (FA) molecules binding to human serum albumin (HSA) in human serum is a suitable method for the identification of patients with PAC through detection of PAC-induced changes of FA binding to albumin. The functionality of HSA to bind FA is investigated in serum samples of 35 patients with PAC, 26 patients with benign pancreatic tumors (BPD), and 24 healthy individuals by continuous wave (CW) EPR spectroscopy by simply dissolving 16-DOXYL stearic acid as spin-labeled FA.

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Purpose: In advanced pancreatic cancer (PC), en-bloc vein resection and reconstruction (VR) is a curative option in oncologic pancreatectomy. However, few data about long-term patency rates after autologous venous reconstruction are available. We aimed to analyze whether early postoperative morbidity is increased by additional VR.

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One of the functions of Human Serum Albumin (HSA) is binding and transport of fatty acids. This ability could be altered by the presence of several blood components such as toxins or peptides - which in turn alters the functionality of the protein. We aim at characterizing HSA and its fatty acid binding in native serum environment.

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Background: Laparoscopic procedures have increasingly been accepted as standard in surgical treatment of benign and malignant entities, resulting in a continuous evolution of operative techniques. Since one of the aims in laparoscopic colorectal surgery is to reduce access trauma, one possible way is to further reduce the surgical site by the single-incision laparoscopic surgery technique (SLS). One of the main criticisms concerning the use of SLS is its questionable benefit combined with its technical demands for the surgeon.

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Introduction: In colorectal cancer (CRC), no biological marker is known that could serve both as a marker for detection and prognosis. Electron spin resonance (ESR) spectroscopy of spin-labeled fatty acid (FA) molecules binding to human serum albumin is a suitable method for the detection of conformational changes and alterations of transport function of albumin through changes in its FA binding capabilities.

Objective: The aim of this study was to examine whether the FA binding to albumin is detectably and significantly altered in CRC patients when compared with patients having benign colorectal diseases.

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Context: Carcinosarcoma (malignant mixed tumor) is a rare variant of a pancreatic neoplasm having a dismal prognosis; very few clinical data and treatment options have been published. Unlike adenocarcinoma of the pancreas, there is nothing specific in the literature for this variant regarding postoperative treatment with chemotherapeutic agents.

Case Report: We report the case of a 61-year-old woman presenting with anemia.

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Medullary thyroid carcinomas (MTC) constitute about 5 to 7 % of thyroid neoplasms. They originate from parafollicular C-cells which can secrete adrenocorticotropic hormone (ACTH) and/or corticotropin-releasing factor (CRF) in abnormally high concentrations, potentially causing paraneoplastic Cushing's Syndrome (CS). We report on a 42-year-old male patient with a ten year history of metastatic medullary thyroid carcinoma suffering from paraneoplastic Cushing's Syndrome caused by ectopic hypersecretion of ACTH and a simultaneous Cortisol producing adrenal metastasis.

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Background: Epiploic appendagitis (EA) is a rare cause of focal abdominal pain in otherwise healthy patients with mild or absent secondary signs of abdominal pathology. It can mimick diverticulitis or appendicitis on clinical exam. The diagnosis of EA is very infrequent, due in part to low or absent awareness among general surgeons.

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Background: Medullary thyroid carcinomas (MTC) constitute about 5 to 7% of thyroid neoplasms. They originate from parafollicular C cells which produce Calcitonin, a hormone which has an impact on calcium metabolism and represents the biochemical activity of MTC. In rare cases pre-operative serum calcitonin can be negative.

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