Lege Artis Medicinae

[RETROPERITONEAL LIPOSARCOMA]

NÉMETH Hajnalka, KOVÁCS Erzsébet, SÁPY Péter, PÁSZTOR Éva, DEZSŐ Balázs, SZŐLLŐSI Zoltán, PFLIEGLER György

DECEMBER 20, 2007

Lege Artis Medicinae - 2007;17(12)

[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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[Erythropoietin produced by the foetal liver and the adult kidney is the major stimulator of erythropoiesis. Erythropoietin production is regulated by hypoxic activation of erythropoietin gene transcription. Recently, new sites of erythropoietin production have been found mainly in the central nervous system and in the cardiovascular system. These tissues have a paracrine and/or autocrine system of erythopoietin. The pleiotropic function of erythropoietin in these systems is tissue and cell protection by several mechanisms including inhibition of apoptosis, attenuation of ischaemic or reperfusion injury, anti-inflammatory and antioxidative effects. Furthermore, it promotes vascular recovery and enhances neoangiogenesis. In vivo and in vitro studies have proved that systemically administered human erythropoietin can also provide tissue protection. However, adverse effects of erythropoietin treatment such as hypertension, hyperviscosity and thrombosis may override the beneficial effect of systemic erythropoietin treatment. There are preliminary data that erythropoietin analogues, e.g., asyaloerythropoietin or carbamylated erythropoietin can provide tissue protection without stimulating erythropoiesis.]

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