الفهرس 
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Abstract
Inferior turbinate hypertrophy is a common cause of nasal obstruction. It is mostly as a result of allergic and non-allergic rhinitis. Medical treatment is the first line of management. While surgery is done only for cases not responding to medications. It is important to understand the pathophysiology of the turbinate and its structure to choose the most appropriate technique for reduction of hypertrophied inferior turbinate. The hypertrophied turbinate is composed of bony part covered by mucosal part in varying degrees. Some are mostly mucosal and others are mainly bony. In this study we choose enlarged inferior turbinate with mixed component with equal or near equal bony and mucosal part. That is in order to compare between two common techniques of inferior turbinate reduction, which are submucos resection and submucos diathermy combined with outfracture of inferior turbinate. Both techniques are very common but there are always a debate which one is better. They both preserve the mucosa of the turbinate, so they maintain the normal physiology of the nose. For appropriate evaluation of nasal obstruction (the main complaint), it is important to add subjective and objective measures to assess the nasal airflow by NOSE score and VAS scale are both very common subjective measurements. While, for objective measurement of nasal airflow, 4 grades endoscopic classification system of inferior turbinate hypertrophy and PNIF evaluation are easy and applicable measures. In this study, subjective assessment using NOSE scale and VAS scale proved that both techniques were effective in relieving nasal obstruction as it improved in both groups post operatively compared to pre-operative data. However, resection technique was better than diathermy technique with a statistically significant difference. While objective assessment of nasal obstruction showed better results in resection group than diathermy group, but with no statistically significant difference. Also, evaluation of complications if present gives a good idea about which technique is better like bleeding, pain, crustations and healing. In this study, submucos resection showed more intra operative bleeding. It is important to know that the component of hypertrophy may guide the choice of the surgical procedure. As resection technique showed better results than diathermy technique in this study, when it was applied in mixed type hypertrophy (bone and soft tissue). Resection technique could be the proper choice with the enlarged bony turbinate, while diathermy technique is more appropriate with the mucosal type.