Lege Artis Medicinae

[A CASE OF MISIDENTIFIED SYNCHRONOUS COLON CANCER]

CSERNI Gábor, BORI Rita, OLÁH Csaba, HAUSINGER Péter, TUSA Magdolna, MARKÓ László, SVÉBIS Mihály

DECEMBER 20, 2007

Lege Artis Medicinae - 2007;17(12)

[INTRODUCTION - Synchronous colorectal cancers are not uncommon, therefore, total colonoscopy is indicated even in cases of distally located large bowel carcinomas. CASE REPORT - An 84-year-old man had emergency surgery because of bowel obstruction and a node-negative carcinoma of the sigmoid colon was removed according to Hartmann. Before the reconstruction of bowel continuity, colonoscopy revealed a relatively small polypoid tumour in the right colon, unsuitable for colonoscopic polypectomy. Two localization clips were then inserted at the site of the endoscopic biopsy that later resulted in the diagnosis of adenocarcinoma. At the time of the reconstruction surgery, an appendectomy was also performed and, though the clips were not found, the polypoid tumour was removed through appendectomic orifice. The polyp thus removed, however, proved to be an adenoma. A repeated colonoscopy and biopsy confirmed both the localization clips and the malignant nature of the remaining right-sided lesion, which was finally removed with right hemicolectomy. CONCLUSION - Anatomic localization of rightsided colon cancers by colonoscopy is often imprecise. The correct identification of a malignant tumour may be compromised by a nearby benign lesion. If a lesion was labelled by some means, the localization sign should be identified both intraoperatively and during the gross pathologic work-up, asking for external help (e.g., radiology in case of a metal clip) if necessary.]

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[RETROPERITONEAL LIPOSARCOMA]

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[INTRODUCTION - Liposarcoma is a malignant soft tissue tumour, which represents less than 0.1% of all human cancers. Approximately 20% of liposarcomas arise in the retroperitoneum. Radical surgical excision is potentially curative, making it the first choice of treatment. For local tumour control palliative chemo- and/or radiotherapy can be used. CASE REPORT - A 28-year-old man with a history of weight loss, fatigue and abdominal tightness was diagnosed to have a giant dedifferentiated retroperitoneal liposarcoma, which showed aggressive growth and gave local recurrences. Multiple surgical excisions were performed, the first two times with curative, subsequently with palliative intent. To reduce the retroperitoneal tumour mass, several chemotherapeutic regimens were applied with complementary radiotherapy. As a result of the combinational therapy, tumour growth stopped temporarily, pressure pain subsided and the patient's quality of life was satisfactory. Finally, distant metastases developed in the bones of the right hip, in the lung and on the serous membranes and after 44 months of follow-up the patient died. CONCLUSION - It has been postulated that ifosfamide and doxorubicin based combined chemotherapy prevents or postpones the development of distant metastases. Considering the significant risk of local and distant recurrences, the use of ifosfamide-doxorubicin based combined chemotherapy is recommended in highgrade retroperitoneal liposarcoma, even following complete surgical excision.]

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[THE ROLE AND METHODS OF IMPROVING INSULIN SENSITIVITY AND BETA-CELL FUNCTION IN TYPE 2 DIABETES]

GYIMESI András, TÁRNOK Enikő, TAYBANI Zoltán

[Increased knowledge on the pathogenesis of type 2 diabetes has considerably transformed the principles and practice of treatment. Insulin resistance and beta-cell dysfunction, the two main components of the pathogenesis both play a role in the conversion of normal glucose metabolism, through impaired glucose tolerance, into type 2 diabetes. Decreased insulin sensitivity, with or without beta-cell dysfunction, is present in the vast majority cases, therefore, its treatment is essential. Physical activity is known to improve insulin sensitivity. The primary action of the recommended first-line pharmacological agent metformin is the inhibition of hepatic glucose production but it also moderately stimulates muscle glucose uptake. Glitazones are insulin sensitizers that increase glucose uptake in muscle and adipose tissue and moderately decrease hepatic glucose production. Some evidence suggests that α-glucosidase inhibitors and also certain insulin secretagogues can improve the effect of insulin. Early detection of the pathologic state and an efficient treatment to improve both insulin sensitivity and beta-cell function are essential in order to slow the progression and prevent the development of complications in type 2 diabetes.]

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[INTRODUCTION - Authors present six cases of intramural oesophageal metastases of adenocarcinomas located in the gastro-oesophageal junction. The tumours and metastases were diagnosed by endoscopic examinations. PATIENTS AND METHODS - Between 01. 01. 1994. and 31. 12. 2000. a total number of 143 patients were examined with the diagnosis of adenocarcinoma of the gastro-oesophageal junction. In six patients (4,19 %), intramural oesophageal metastases were verified. In each case the diagnosis was confirmed by histological examination. TNM stage of the tumours was assessed considering the results of endoscopic ultrasound examination, the findings at initial operation and the pathological data in all cases, where resection was performed. The tumours were localized according to Siewert- Stein’s classification. RESULTS - In six patients who had adenocarcinoma of the gastro-oesophageal junction, the diagnosis of intramural oesophageal metastases was confirmed. The histological structure of the primaer tumours and metastases were the same. Metastases were detected by endoscopic ultrasound examination in three cases of the four examined patients as submucosal masses. All of the cardiac tumours proved to be well advanced: four of them classified as T4N1 by endoscopic ultrasound. Intramural metastases were diagnosed in each Siewert-Stein subgroups. CONCLUSION - Endoscopic examination is of crucial importance in the diagnosis of adenocarcinomas of the gastro-oesophageal junction and in their intramural metastases as well. Beside the endoscopic identification the primary tumour, the thorough examination of the proximal part of the oesophagus seems to be of great importance. These metastatic cancers appeared in the advanced stage of the disease. Endoscopic ultrasound examination is of great help in these cases to identify whether the mass causing oesophageal impression is outside of the wall of the organ, or in which layer it is localized. Endoscopic ultrasound examination also gives the possibility for preoperative assessment of the TNM stage of the disease.]

Lege Artis Medicinae

[Systemic adjuvant pharmacotherapy of colorectal cancer]

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[Colorectal cancer is one of the most frequent cancer in the postindustrial world; its most common form is adenocarcinoma. In Hungary, colorectal cancer has the second highest mortality among tumours. If diagnosed early, it might be successfully treated by surgery, however, chemotherapy is necessary to prevent tumor relapse and development of metastases and achieve adequate palliation. In the past few years, adjuvant treatment of colorectal cancer has improved substantially. Many new drugs have been developed, which are also being used in combination with previously known agents. This article will discuss the novelties in the field of adjuvant chemotherapy for colorectal cancer and the main guidelines of adjuvant treatment.]

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[Objectives - Ineffective surgical and radiotherapy of glioblastoma is mainly due to its intensive infiltrating behavior. Contrarily, brain metastases of anaplastic carcinomas are well-circumscribed intracerebral lesions that can be easily exstirpated in most cases. The molecules of the extracellular matrix (ECM) play a pivotal role in the peritumoral infiltration. In this study the mRNA expression of the ECM components was investigated in two types of intracerebral malignoma with different invasion activity. Our aim was to identify the ECM molecules that are responsible for the different intensity of peritumoral infiltration of tumors from different origin. Methods - The mRNA expression of twenty-three ECM molecules was determined by quantitative reverse transcriptase polymerase chain reaction. Four pieces of glioblastoma and four pieces of intracerebral lung adenocarcinoma metastasis from neurosurgical operation were investigated. Immunohistochemical investigations were performed in case of five molecules. Results - The mRNA expression of nine molecules (brevican, neurocan, neuroglycan-C, syndecan-1,2,4, tenascin-C, versican and matrix-metalloproteinase-[MMP]2) differed significantly by comparison of the two tumor types. By immunohistochemistry, neurocan, syndecan, versican and MMP-2 showed alteration in staining intensity according to the mRNA expression, while MMP-9 showed higher staining intensity in the metastatic tumor. Conclusions - The identified molecules can play an important role in the different infiltration activity of tumors from different origin. Thus these ECM-components could serve as targets for anti-invasion therapy in the future.]

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