Effect of different pasture species on growth performance, carcass traits, internal organ weights, and meat quality of slower growing broilers in free-range production system.

This study examined the effect of Medicago sativa (A), Trifolium repens (WC), Lolium perenne (PR), and their mixture (Mix) on growth performance, carcass characteristics, internal organ weights, and meat quality of slower-growing broiler chickens in a free-range production system. The animal materials comprised of mixed-sex Hubbard ISA Red JA, which were reared in the deep litter system for the first 3 weeks, and thereafter, the pop hole in each of the indoor pens was opened to allow birds access to the range containing one of the above pasture treatments. The range availability was ensured from 08:30 a.m. to 4:30 p.m. The results indicated no significant difference in broiler live body weight, feed conversion ratio, and livability between 28 and 77 days among the pasture treatments (P > 0.05). No significant variations were observed in the carcass and internal organ weights among pasture types (P > 0.05). Additionally, while the dry matter content (P < 0.01), TBA value (P < 0.05), and fatty acid profiles differed (P < 0.01), the protein, ash, water holding capacity, and oxidation stability of broiler breast meat did not differ among pasture groups (P > 0.05). Moreover, while the values of breast meat lightness (L*) and brightness (b*) differed (P < 0.05), redness and pH did not differ between the sexes (P > 0.05). Furthermore, sex significantly affected ash, protein content (P < 0.05), and TBA value (P < 0.01) of breast meat but did not affect dry matter, water holding capacity, and peroxide value of breast meat. Also, there was a significant difference in the weight of the neck, breast, thigh, live weight, hot carcass yield, heart, liver, abdominal fat, and digestive system between sexes (P < 0.05). However, breast meat fat content and fatty acid profiles were not influenced by the sex of the broilers (P > 0.05). It was concluded that access to the studied pasture species has no effect on the growth performance traits but results in notable variations in the fatty acid profiles in broiler breast meat.

Utilization of Sunflower Oil-based Oleogel forDeep-Fried Coated Chicken Products.

This study aimed to examine the effect of using oleogel as a frying medium on the quality of coated and deep-fried chicken products. Sunflower oil-based oleogels prepared with 0.5%, 1%, 1.5% and 2% carnauba wax were produced for deep frying of coated chicken products and were compared to sunflower and commercial frying oil based on palm oil. The increased carnauba wax concentration in the oleogel decreased the pH, oil, oil absorbance and TBARS value of coated chicken (p < 0.05). Samples deepfried with oleogels containing 1.5% and 2% carnauba wax had the lowest pH values. In addition, since the oil absorption during deep-frying was significantly reduced in these groups (1.5 and 2%), the fat contents of coated products were also lower (p < 0.05). The use of oleogel as a frying medium did not cause a significant change in the color values of the coated chicken products. However, the increased carnauba wax concentration in the oleogel increased the hardness of coated chicken (p < 0.05). As a result, sunflower oilbased oleogels with a carnauba wax content of 1.5% and higher which is healthier in terms of saturated fat content can be used as frying media and can be improved the quality of coated and deep-fried chicken products.

Optimization of Olive Oil Oleogel-Based Emulsion Composition: Effect of Oleogel Composition on Emulsion Characteristics.

In this study, the effects of oil, water, glycerol monostearate, carrageenan and alginate concentrations, which have a significant effect on quality parameters in olive oil oleogel-based emulsion (OOE), were investigated and their optimum amounts were determined by mixture design for oleogel production with desired properties. OOE was produced using olive oil, water, glycerol monostearate (GMS), carrageenan and alginate at various concentrations in the range of 0-70%, 30-60%, 0-2%, 0-2% and 0-2%, respectively. The optimum quality parameters of OOE were evaluated in terms of optimum firmness value (5.5-7 N), minimum oil loss and peroxide value. The optimum composition was determined 53.5% olive oil, 43.5% water, 1.1% carrageenan, 0.92% alginate and 0.98% glycerol monostearate (w/w). Produced OOE under determined optimum conditions had 5.81 N firmness, 1.82 meq/O2 peroxide value and 21.02% oil loss value. The margin of error between the experimentally obtained data and the estimated data in the study is average 2%. The results showed that the formulation used in OOE production have significant effects on the created OOE structure and quality parameters. In addition, different formulations to be created with the results of the present study will contribute to increasing the applicability of OOE in different foods.

Valorization of waste chicken skin for conjugated linoleic acid (CLA) production: optimization using response surface methodology.

The valorization of waste chicken skin fat (WCSF) for conjugated linoleic acid (CLA) production was performed by photoisomerization and optimized the process conditions for high CLA production by response surface methodology. The fat extraction yield from waste chicken skin was approximately 52%. The linoleic acid content of the fat obtained from waste chicken skin was increased by the fractionation process approximately 2 times, up to 52%. Optimum iodine amount and processing time for predicted maximum total CLA amount were determined as 0.87% and 116.36 h, respectively. The maximum total CLA amount was predicted and produced experimentally as 32.14% and 29.01%, respectively. Additionally, iodine amount, processing time, and their interaction significantly affected the amount and variety of produced CLA isomers. The results indicated that dominant isomers produced by photoisomerization of WCSF were trans, trans isomers. However, the amount of cis 9, trans 11 and trans 10, cis 12 CLA isomers could be more increased by optimizing the production parameters. The present study indicated that waste chicken skin could be valorized in CLA production by photoisomerization and obtained high value-added product, and also a more economical and faster CLA production could be realized.

Modified Blair Approach for the Treatment of Mandibular Condyle Fractures.

PURPOSE: The management of fractures of the condyle of the mandible has been a topic of debate and still no consensus exists in the literature about the most appropriate approach. The objective of this study was to evaluate the efficacy and safety of the modified Blair approach for the open reduction and internal fixation of mandibular condyle fractures. METHODS: A retrospective study was conducted on 18 patients with 20 mandibular condyle fractures from 2014 to 2020. All patients were treated surgically using the modified Blair approach. Postoperative occlusion status and mouth opening were assessed for treatment outcomes. Also, the rate of complications such as facial nerve paralysis, wound infection, hematoma, salivary fistula, Frey syndrome, and greater auricular nerve paraeesthesia evaluated. RESULTS: Seventeen out of 18 patients (94.4%) achieved their original pretraumatic occlusion after the surgery. One patient (5.5%) had postoperative occlusal interference due to premature dental contact. The maximal postoperative interincisal distance was measured with a range between 33 and 41 mm (mean 37.6 mm). One patient (5.6%) had transient facial nerve palsy. Also, salivary fistula developed in 1 (5.6%) patient in the postoperative period. CONCLUSION: The results of this study revealed that the modified Blair approach provides satisfactory clinical outcomes with low complication rates and may offer an alternative, safe, and effective method for open reduction and internal fixation of mandibular condyle fracture.

Middle-Ear Resonance Frequency and Eustachian Tube Function in Players of Wind Instruments.

INTRODUCTION: The effect of the continuous forced expiration action of players of wind instruments to produce sound, on the eustachian tube functions and the middle-ear resonance frequency (RF), has not been investigated in the literature to date. The aim of this study is to evaluate eustachian tube functions and the middle-ear RF of players of wind instruments. METHODS: In this prospective case-control clinical study, a study group of 28 players of wind instruments in the orchestra (28 participants, 56 ears) and a control group of 34 volunteers (34 participants, 68 ears) were included. The eustachian function of wind instrument players in a symphony orchestra was measured using an automatic eustachian tube function test in acoustic tympanometry and the RF of the middle ear was determined in multifrequency tympanometry. RESULTS: There was a statistically significant difference among the musicians, especially in players of woodwind instruments, in terms of dysfunction of the eustachian tubes (p = 0.048). In the musicians, the pre- and postperformance RF mean values for all ears were 925 and 1,020 Hz, respectively, and these were significantly different (p = 0.004). CONCLUSION: This is the first study to uses multifrequency tympanometry to examine the middle-ear RF and eustachian tube function of wind instrument musicians in an orchestra. Eustachian tube dysfunction was found to be more prominent and a higher RF of the middle ear was seen after a performance, especially in players of wood wind instruments. However, the effect of these on the professional performance of players of wind instruments should be investigated in future work.

Optimization of pH, time, temperature, variety and concentration of the added fatty acid and the initial count of added lactic acid Bacteria strains to improve microbial conjugated linoleic acid production in fermented ground beef.

The aim of the present study was to determine the optimum pH, time, temperature, variety and concentration of the added fatty acid and the initial count of added Lactobacillus plantarum AB20-961 and Lactobacillus plantarum DSM2601 for high conjugated linoleic acid (CLA) production in ground beef. The highest CLA production with using safflower fatty acids by L. plantarum AB20-961 and L. plantarum DSM2601 was 7.91 and 38.31 mg CLA/g fat, respectively (P < 0.05). Optimum conditions for both strains were 37 °C fermentation temperature, 5% added fatty acid in free form and 8 log CFU/g initial count. Additionally, the optimum pH and fermentation time were 7.94 pH and 78.78 h for L. plantarum AB20-961 and 7.68 and 72.57 h for L. plantarum DSM2601. The results indicated that both L. plantarum strains with optimum conditions determined in the present study may be applied in order to enrich CLA content in ground beef and satisfy consumer demands for the fermented meat products with functional components.

Utilization of optimized processing conditions for high yield synthesis of conjugated linoleic acid by L. plantarum AB20-961 and L. plantarum DSM2601 in semi-dry fermented sausage.

The aim of this study was to utilize optimized processing conditions to obtain the highest conjugated linoleic acid (CLA) contents in semi-dry fermented sausages produced with L. plantarum AB20-961 and L. plantarum DSM 2601. Optimized conditions were 5.7 meat pH, 5% hydrolyzed safflower oil addition, 108 CFU/g added starter culture, fermentation time of 73 h for L. plantarum DSM2601 and 79 h for L. plantarum AB20-961, 24 °C fermentation temperature, 65 °C internal cooking temperature and 90% relative humidity. Results indicated that CLA contents in sausages were increased 21% by L. plantarum AB20-961 and 121% by L. plantarum DSM2601 after fermentation compared to initial CLA level determined on manufacturing day (P < .05). After fermentation, an increased CLA content of sausages remained stable during heat processing and storage. Sausages incorporated with L. plantarum strains and hydrolyzed safflower oil had the highest TBARS and PUFA levels, and the lowest pH and moisture content (P < .05). Differences were not found in sensorial and other physicochemical properties among sausage treatment groups. This study demonstrated that high CLA content can be achieved in sausages by utilizing optimum processing conditions described above and starter cultures (L. plantarum AB20-961 and L. plantarum DSM2601) without any adverse effects on quality of the final product.

Effects of beta-glucan addition on the physicochemical and microbiological characteristics of fermented sausage.

The objective of this study was to investigate the effects of added beta-glucan (ß-glucan) levels on the lipid oxidation, physicochemical, microbiological, textural and sensorial properties of fermented sausage produced with various amounts of beef fat during fermentation and storage periods. To determine the effects of ß-glucan, twelve sausage treatments included four controls (no ß-glucan) with or without beef fat and starter culture addition and eight ß-glucan incorporated groups produced with addition of starter culture, various levels of ß-glucan (0, 1, 2%) and different levels (0, 10, 15, 20%) of beef fat were manufactured. The results indicated that addition of ß-glucan decreased thiobarbituric acid reactive substances (TBARS) values compared to control groups which had 20% beef fat (P < 0.05). ß-glucan enhanced the growth of lactic acid bacteria during fermentation and storage periods (P < 0.05). The addition of ß-glucan caused a decrease in water activity and pH values of sausage during the fermentation and storage (P < 0.05). Color values, fatty acid composition, protein, fat, moisture and ash content were not influenced by the use of ß-glucan (P < 0.05). Higher levels of ß-glucan in sausage formulation caused an increase in the hardness values of sausage (P < 0.05).

Potential use of interesterified palm kernel oil to replace animal fat in frankfurters.

The aim of the study was to investigate the effects of replacing beef fat with interesterified palm kernel oil (IPKO) on the quality characteristics and storage stability of frankfurters. Five treatment groups were: control (C) and four levels of IPKO replacements; 25, 50, 75 and 100%. Study results revealed that replacement of beef fat with IPKO resulted in a significant increase in caprylic (C8:0), capric (C10:0), lauric (C12:0) and miristic acid (C14:0) levels and a decrease in palmitic (C16:0), palmitoleic (C16:1), stearic (C18:0) and oleic acid (C18:1) levels in frankfurters (P < 0.05). Higher TBARS values were determined in frankfurters manufactured with IPKO compared to the control group after the manufacturing and storage periods (P < 0.05). A 75% and 100% beef fat replacement with IPKO had significantly lower hardness values compared to the other groups (P < 0.05). The use of IPKO increased pH in frankfurters (P < 0.05). However, replacing beef fat with IPKO did not affect moisture, fat, protein, ash contents and sensory properties.

Effects of replacement of beef fat with interesterified palm kernel oil on the quality characteristics of Turkish dry-fermented sausage.

The objective of this study was to investigate the effects of replacing beef fat with enzymatic interesterified palm kernel oil (IPKO) on the quality characteristics and storage stability of sucuk (Turkish dry-fermented sausage). The partial (25, 50, 75%) and complete (100%) replacement of added beef fat with IPKO were carried out during sucuk processing. According to the study results, replacement of beef fat with IPKO resulted in significant increase in the concentrations of caprylic, capric, lauric and mryistic acid and decrease in the concentrations of stearic, oleic and linoleic acid in sucuk (P<0.05). Even though replacement with IPKO did not affect TBARS of sucuk dough, a slightly higher TBARS values were determined in sucuk manufactured with IPKO at the end of storage compared to control (P<0.05). Hardness, gumminess and chewiness values of sucuks were decreased with IPKO replacement (P<0.05). Replacement with IPKO increased moisture and a* and b*, decreased protein, fat and pH in sucuks at the end of fermentation (P<0.05).

In-vitro microbial production of conjugated linoleic acid by probiotic L. plantarum strains: Utilization as a functional starter culture in sucuk fermentation.

Twenty-three probiotic Lactobacillus plantarum strains were screened in-vitro to determine their ability to produce conjugated linoleic acid (CLA). L. plantarum AA1-2 and L. plantarum AB20-961 were identified as potential strains for CLA production. Optimum conditions for these strains to produce high levels of CLA were determined by evaluating the amount of added hydrolyzed sunflower oil (HSO) and initial pH levels in a nutrient medium. The highest CLA production was obtained in medium with pH6.0 and 2% HSO (P<0.05). Those strains were then used as starter culture in sucuk fermentation. Five sucuk treatments included a control (no starter culture), two sucuk groups with L. plantarum AA1-2 at the initial pH of 5.8 or 6.0 and two sucuk groups with L. plantarum AB20-961 at the initial pH of 5.8 or 6.0. Results indicate that L. plantarum AB20-961 produced higher amount of CLA in sucuk at initial pH of 5.8 and 6.0 levels during first 24h of fermentation compared with other groups. CLA isomer concentration decreased in all sucuk groups during the rest of the fermentation period (P<0.05) and remained quite stable during the storage. This study demonstrated that probiotic L. plantarum AB20-961 can be used in sucuk manufacturing without posing any quality problems.

Pediatric Mass Lesions of the Head and Neck Region and Fine-Needle Aspiration Biopsy Results.

OBJECTIVE: 1. To provide a classification of pediatric mass of the head and neck region and evaluate their frequency. 2. To examine the findings of fine-needle aspiration biopsy (FNAB) in pediatric patients along with its contribution to diagnosis. METHODS: Totally, 233 pediatric patients (125 boys and 108 girls) operated at Baskent University for head and neck mass were included. Clinical, radiological, and histopathological data were retrieved from medical records. RESULTS: The mean age was 119±65 months, and the mean duration of follow-up was 75±49 months. Localization of the masses was as follows: 208 (89%) in the neck, 21 (9%) in the oral cavity, 2 (1%) in the neck and nasopharynx, and two (1%) in the larynx. The most common surgical procedure was open excisional biopsy (n=105, 45%) followed by cystic mass excision (n=72, 31%) and salivary gland excision (n=33, 14%). Based on histopathological findings, benign cystic lesions were the most common disease group (n=77, 33.1%), whereas reactive lymphadenopathy was the most common condition (n=36, 15%) when a single disease was considered. Infectious/inflammatory diseases, malignancies, and benign salivary gland diseases were present in 49 (21%), 24 (10.3%), and 22 (9.4%) patients, respectively. FNAB was performed in 29.8% of the patients with an accuracy of 90.3% (95% CI, 80.1-96.4). CONCLUSION: The differential diagnosis of head and neck masses during childhood includes a wide spectrum with the different conditions being benign cystic diseases of congenital origin and reactive lymphadenopathies. Owing to its high predictive value, FNAB represents a rapid and reliable method that can be commonly used in both adult and pediatric patients.

Hoarseness in School-Aged Children and Effectiveness of Voice Therapy in International Classification of Functioning Framework.

OBJECTIVES: The hoarseness in school-aged children disrupts the educational process because it affects the social progress, communication skills, and self-esteem of children. Besides otorhinolaryngological examination, the first treatment option is voice therapy when hoarseness occurs. The aim of the study was to determine the factors increasing the hoarseness in school-aged children by parental interview and to know preferable voice therapy on school-aged children within the frame of International Classification of Functioning (ICF). STUDY DESIGN: Retrospective analysis of data gathered from patient files. METHOD: A total of 75 children (56 boys and 19 girls) were examined retrospectively. The age range of school-aged children is 7-14 years and average is 10.86 ± 2.51. A detailed history was taken from parents of children involved in this study. Information about vocal habits of children was gathered within the frame of ICF and then the voice therapies of children were started by scheduling appointments by an experienced speech-language pathologist. RESULTS: The differences between before and after voice therapy according to applied voice therapy methods, statistically significant differences were determined between maximum phonation time values and s/z rate. The relationship between voice therapy sessions and s/z rate with middle degree significance was found with physiological voice therapy sessions. According to ICF labels, most of voice complaints are matching with "body functions" and "activity and limitations." CONCLUSIONS: The appropriate voice therapy methods for hoarseness in school-aged children must be chosen and applied by speech-language therapists. The detailed history, which is received from family during the examination, within the frame of ICF affects the processes of choosing the voice therapy method and application of them positively. Child's family is very important for a successful management.

Effect of conjugated linoleic acid enrichment on the quality characteristics of Turkish dry fermented sausage.

The effects of conjugated linoleic acid (CLA) enrichment on lipid oxidation, the fatty acid profile, physico-chemical, sensory and microbiological features of sucuk were investigated. The control sucuk did not contain CLA, however, other groups contained 0.5 %, 1 %, 1.5 %, 2 %, 2.5 %, and 3 % CLA, respectively. The results indicated that CLA concentration was increased in sucuk with CLA addition (p < 0.05). CLA concentration decreased (p < 0.05) during the fermentation period, but did not alter during the storage. Lipid oxidation gradually increased with the increasing of storage in all treatments (p < 0.05). However, addition of CLA decreased lipid oxidation compared to control (p < 0.05). With regard to color, higher L* values were observed in 2 % CLA treatment group compared to other treatments during storage (p < 0.05). Moreover, CLA addition resulted in increased a* values in sucuk (p < 0.05). With the addition of CLA, saturated fatty acids in sucuk decreased and poly-unsaturated fatty acids and conjugated linoleic acids increased (p < 0.05).

The Role of PET-CT in Evaluation of Cervical Lymph Node Metastases in Oral Cavity Squamous Cell Carcinomas.

OBJECTIVE: The aim of this study is to determine the sensitivity and specificity of positron emission tomography-computed tomography (PET-CT) in the evaluation of cervical lymph node metastasis in oral cavity squamous cell cancers (SCCs) and to determine the SUV-max values in differentiating reactive and metastatic lymph nodes as a supportive parameter. METHODS: In this study, 23 patients were included who were diagnosed with oral cavity SCC and treated with surgery between 2006 and 2013 in our department. All the patients were scanned with PET-CT during the pretreatment evaluation. Detailed pretreatment PET-CT (retention sites and SUV-max values) and histopathological examination results were obtained. SPSS 17.0 software package was used for statistical analysis of the data. Categorical measurement was summarized as number and percentage and continuous measurements as mean and standard deviation (median and minimum-maximum where necessary). Chi-square test or Fisher's test were used in the comparison of categorical variables. Compliance of methods was assessed by Kappa coefficient analysis. In this study, the advantages of PET-CT were determined by the calculation of sensitivity and specificity values with histopathological examination results considered as the gold standard, and SUV-max value was assessed by examining the area under the ROC curve. In all tests, the level of statistical significance was accepted as 0.05. RESULTS: The threshold value for SUV-max depending on the data of the histopathological examination and results of PET-CT of the 23 patients was 2.50. The reliability of this threshold was determined as AUC=0.819. In demonstrating neck metastasis in patients with cancer of the oral cavity, PET-CT has a sensitivity of 89% and specificity of 98%. Compliance between the histopathological examination and PET-CT for metastatic cervical lymph nodes was determined to be 0.416 by kappa coefficient analysis. CONCLUSION: There was FDG uptake on PET-CT in the cervical lymph node regions of all patients with metastatic cervical lymph nodes. There were no metastases in any of the patients with no FDG retention. The sensitivity and specificity of PET-CT in determining cervical lymph node metastasis were 89% and 98%, respectively, with a threshold SUV-max value considered as 2.50 in patients with FDG retention.

Clinical significance of TRAIL and TRAIL receptors in patients with head and neck cancer.

BACKGROUND: Tumor necrosis factor (TNF)-related apoptosis-inducing ligand (TRAIL) is a death ligand currently under clinical trials for cancer. The molecular profile of TRAIL and TRAIL receptors has not yet been mapped for patients with laryngeal squamous cell carcinoma (SCC) or patients with oral cavity squamous cell carcinoma (OCSCC). METHODS: Paraffin-embedded tissues from 60 patients with laryngeal SCC and 14 patients with OCSCC were retrospectively analyzed using immunohistochemistry. RESULTS: An increase in decoy-R1 (DcR1) but a decrease in decoy-R2 (DcR2) expression were observed in patients with laryngeal SCC and in patients with OCSCC compared with control individuals with benign lesions. Clinical and pathologic grading revealed distinctive TRAIL and TRAIL receptor profiles in patients with squamous cell carcinoma of the head and neck (SCCHN). CONCLUSIONS: TRAIL and a TRAIL receptor expression profile might be useful to follow-up disease progression by virtue of its connection with clinical staging and pathologic grading in patients with laryngeal SCC.

Growth characteristics and clinical manifestations of the paranasal sinus osteomas.

OBJECTIVE: To investigate the clinical features of paranasal sinus osteomas and to estimate the growth rate of these tumors in a large series of patients. DESIGN: Case series with chart review. SETTING: University hospital, tertiary referral center. SUBJECTS AND METHODS: The authors retrospectively reviewed the paranasal sinus tomography scans that were taken between January 1997 and April 2008 to find patients with paranasal sinus osteomas. A questionnaire was performed to evaluate the possible clinical symptoms associated with sinus osteomas, and control paranasal sinus computed tomography was taken for patients in whom paranasal computed tomography examination had been done at least 1 year ago. RESULTS: A total of 17,154 paranasal sinus computed tomographies of 14,137 patients were reviewed, and 243 cases of paranasal sinus osteomas were found. The lesions were located in the frontal sinus in 183, ethmoid sinus in 48, maxillary sinus in 5, and sphenoid sinus in 7 patients. Eighty-nine patients with paranasal sinus osteomas were readmitted. The mean follow-up was 54 months in this group. In 46 of 89 patients, an increase in the size of osteomas was detected. The mean growth rate of osteomas was estimated to be 0.79 mm/y in the cephalocaudal direction and 0.99 mm/y in the mediolateral direction. No significant differences were found in the growth rate according to location and growth directions. CONCLUSION: Neither a specific growth pattern nor a specific factor affecting the growth rate of these tumors could be demonstrated. Follow-up is necessary because of the potential severe complications.

[The therapeutic role and effectiveness of selective neck dissection in the management of N0 neck]. / N0 boyun tedavisinde selektif boyun diseksiyonunun tedavideki rolü ve etkinligi.

OBJECTIVES: To assess the therapeutic role and the effectiveness of the selective neck dissection in the management of the clinically node negative neck in the head and neck squamous cell carcinomas. PATIENTS AND METHODS: The charts of 177 patients with squamous cell carcinoma, who underwent neck dissection between January 2000 and January 2007, were reviewed retrospectively. Seventy neck dissections in 58 patients (51 males, 7 females; mean age 63 years; range 21 to 85 years) in whom the primary site of the lesion was the larynx, oral cavity, oropharynx and hypopharynx, and who were considered to have N0 neck and to comply with the study criteria were included in the study. Details were collected on tumor site and stage, type of surgery, pathologic N stage, number and size of pathologic nodes, extracapsular spread of nodes, postoperative radiotherapy, local recurrence, follow up time and survival status in all patients. RESULTS: It was found out that selective neck dissection operations were performed on 99 of 102 N0 patients. The follow up time was approximately 23 months in 58 patients who were found to comply with the inclusion criteria. The most frequent site for primary tumor was larynx and most patients were at T2 stage. Nine patients had pathologically positive lymph node with occult metastasis rate of 13%. The overall recurrence rate was 19%. Postoperative radiotherapy was used as adjuvant therapy in 15 patients. Regional control rate was lower in patients with pathologically positive lymph nodes. However, it was not statistically significant. CONCLUSION: Selective neck dissection is an effective and safe method for controlling and staging of the patients with clinically N0 neck.