الفهرس 
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Abstract
the need for knowledge about the nutritional status of head and neck cancer patients prior to therapy is becoming more and more obvious this study aimid to detect the abnormalities of some serum enzymes, electrolytes, and protiens in the head and neck cancer patients before and after treatment the study was carried out at the department of otorhion- laryngology surgery, Radiotherapy and Biochemistry of Faculty of Medicine Zagazig Universty .