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Cutaneous lesions of the nose
Michael Sand, Daniel Sand, Christina Thrandorf, Volker Paech, Peter Altmeyer, Falk G Bechara
Head & Face Medicine , 2010, DOI: 10.1186/1746-160x-6-7
Abstract: The nose is the central part of the mid-face and has an important functional, aesthetic and psychological role. Nasal respiration, olfaction and phonation are among its most important functional roles. In addition, the aesthetic importance and its impact on the individual psyche have been the subjects of many previous studies [1-3]. For example, when looking at a face, observers spend the largest amount of gaze time on the nose and eyes, underscoring its prominent position in the central face [4].Because of this exposed, highly visible localization, lesions on the skin of the nose are often noticed by patients themselves, typically very early in the course of the disease. The exposed localization on the face is also cause for increased exposure to ultraviolet (UV) light, which represents one of the most dangerous strains for the skin in this particular location because it is a proven carcinogen. This accounts for the high incidence of cancerous involvement of the skin of the nose, which has proven to be the most common site for skin cancer on the human body [5]. Furthermore, this has lead to the description of the face as a "sun terrace," referring to the skin of the forehead, ears and nose, because the angle of the skin toward sunlight at these locations is more acute than elsewhere. Consequently, UV light exposure is increased, which also includes exposure to the dangerous UV-B spectrum (290-320 nm), shown to be one of the most potent skin carcinogens. Typical UV-B-induced DNA damage involves the generation of dimeric photoproducts between adjacent pyrimidine bases. The tumor suppressor gene p53 is a common target of UV-R-induced mutations. Moreover, UV-A generates highly reactive free radicals, damaging DNA and promoting skin cancer. In addition to its role as a potent carcinogen, UV-A is responsible for damage to the collagen structure, leading to accelerated skin aging [6].The skin of the nose shows several specific anatomical and histological peculiarities tha
Nose tip refinement using interdomal suture in caucasian nose  [cached]
Pasinato, Rogério,Mocelin, Marcos,Berger, Cezar Augusto Sarraf
International Archives of Otorhinolaryngology , 2012,
Abstract: Introduction: Refinement of the nose tip can be accomplished by a variety of techniques, but currently, the use of sutures in the nasal tip with conservative resection of the alar cartilage is the most frequently recommended approach. Objective: To classify the nasal tip and to demonstrate the interdomal suture applied to nasal tip refinement in the Caucasian nose, as well as to provide a simple and practical presentation of the surgical steps. Method: Development of surgical algorithm for nasal tip surgery: 1. Interdomal suture (double binding suture), 2. Interdomal suture with alar cartilage weakening (cross-hatching), 3. Interdomal suture with cephalic removal of the alar cartilage (McIndoe technique) based on the nasal tip type classification. This classification assesses the interdomal distance (angle of domal divergence and intercrural distance), domal arch width, cartilage consistency, and skin type. Interdomal suture is performed through endonasal rhinoplasty by basic technique without delivery (Converse-Diamond technique) under local anesthesia Conclusion: This classification is simple and facilitates the approach of surgical treatment of the nasal tip through interdomal suture, systematizing and standardizing surgical maneuvers for better refinement of the Caucasian nose.
Reconstruction of the columella and the tip of the nose with an island-shaped forehead flap  [PDF]
Vulovi? Dejan,Stepi? Nenad,Pavlovi? Aleksandar,Mili?evi? Sa?a
Vojnosanitetski Pregled , 2011, DOI: 10.2298/vsp1103277v
Abstract: Background. Posttraumatic and postoperative defects of columella and the tip of the nose are difficult to reconstruct. There are several operative methods described in the literature, and many of them are step-by-step procedures with long duration. The aim of this study was to present one-step procedure for reconstruction of the columella and the tip of the nose with island-shaped arterial forehead flap. Case report. A 45-year old man was submitted to surgical excision of basocellular skin cancer. After the excision, a defect of the columella and tip of the nose the remained, 3 × 2.5 cm in dimensions, with exposed alar cartilages. During the same operation, the defect was covered with an island-shaped arterial forehead flap. Postoperative one-year course was uneventful, without signs of tumor recurrence after one year, and further surgical corrections were unnecessary. Conclusion. Considering the results of our operative technique, we believe that middle island-shaped forehead flap is suitable for reconstruction of the columella and the tip of the nose, due to the following reasons: safe vascularization of flap, similarity of the transferred tissue with the excised one, the procedure is completed in one step, simple surgical technique and uncomplicated healing of a flap-harvesting site.
Nasal tip narrowing: Minimally invasive suture technique for thick nose tip
Nassif Filho, Antonio Celso Nunes,Romano, Giovana,Ribas, Denise Braga,Sass, Scheila Maria Gambeta
International Archives of Otorhinolaryngology , 2011,
Abstract: Introduction: Suture techniques are mandatory methods to shape the nasal cartilages. For purposes of achieving a better contour on thick or globose nasal tips, the authors have approached a controlled intercrural and minimally invasive suture technique and the results obtained by submitting 34 patients to rhinoplasty. Objective: Illustrate the intercrural suture technique as a treatment for a thick or globose nasal tip under closed rhinoplasty and explain the esthetical results. Method: Retrospective study with 34 patients' clinical documents and photographs (5 male and 20 female) aged between 16 and 52, who were submitted to the thick or globose nasal tip rhinoplasty as an anatomic element found in the physical examination. In all the cases, closed rhinoplasty technique was used. A suture that cannot be absorbed is performed throughout the intermediate process. The study was performed at the Brazilian Red Cross Hospital in the State of Paraná and Sugisawa Hospital in 2009 and 2010. Patients were operated on by the main author and the junior doctors under training. Results: The controlled intercrural suture enabled the nasal tip to be narrowed and improved the shape in the frontal and lateral angles of the nasal tip. Conclusion: Controlled intercrural suture is a minimally invasive method providing the thick nasal tip narrowing with satisfactory results.
Nose Tip Region Detection in 3D Facial Model across Large Pose Variation and Facial Expression  [PDF]
Laili Hayati Anuar,Syamsiah Mashohor,Makhfudzah Mokhtar,Wan Azizun Wan Adnan
International Journal of Computer Science Issues , 2010,
Abstract: Detecting nose tip location has become an important task in face analysis. However, for a 3D face model with presence of large rotation variation, detecting nose tip location is certainly a challenging task. In this paper, we propose a method to detect nose tip region in large rotation variation based on the geometrical shape of a nose. Nose region has always been considered as the most protuberant part of a face. Based on convex points of face surface, we use morphological approach to obtain nose tip region candidates consist of highest point density. For each point of each region candidate, a signature is generated and evaluated with trained nose tip tolerance band for matching purpose. The region that contains the point which scores the most is chosen as the final nose tip region. This method can handle large rotation variation, facial expression, combination of all rotations (yaw, pitch and roll) and large non-facial outliers. Combination of two databases has been used; UPMFace and GavabDB as training data set and test data set. The experimental results show that 95.19% nose tip region over 1300 3D face models were correctly detected.
Nose-Tip Transition Control by Surface Roughness on a Hypersonic Sphere  [PDF]
Kiran Joy Irimpan, Viren Menezes, K. Srinivasan, Hamid Hosseini
Journal of Flow Control, Measurement & Visualization (JFCMV) , 2018, DOI: 10.4236/jfcmv.2018.63011
Abstract: The surface heat flux on a 100 mm diameter hypersonic sphere was reduced through surface roughness on its forebody. The test model was subjected to a hypersonic freestream of Mach 8.8 and Reynolds number 1.98 million/m, in a shock tunnel. Forebody surface heat transfer rates measured on smooth and rough spheres, under the same free-stream conditions, were compared. The comparison of heat flux indicated an overall reduction in surface heating rates on the rough model, which could be attributed to the delayed nose tip transition. The surface roughness on the forebody of the model generated miniature cavities. Stability of the free shear layer over the miniature cavities and entrapment of the destabilizing vortices in the cavities, make the flow over the rough test model more stable than the attached boundary layer over the smooth model, under transitional conditions.
Congenital arhinia: A rare case  [cached]
Goyal Abhishek,Agrawal Vikesh,Raina V,Sharma D
Journal of Indian Association of Pediatric Surgeons , 2008,
Abstract: Congenital arhinia or absence of nose is a rare condition with only 30 cases reported so far. We report a rare case and briefly review the literature.
Circumscribed congenital alopecias harbouring dual lesions
Rao Shalinee,Janaki Amutha,Kamakshi D,Srinivasan V
Journal of Cutaneous and Aesthetic Surgery , 2010,
Abstract: Treatment of alopecia is often challenging for the clinician as it includes a spectrum of lesions ranging from congenital to acquired causes. We present three cases of congenital circumscribed alopecia, present since birth, clinically diagnosed as nevus sebaceous. Histopathological examination of the excised tissue showed syringocystadenoma papilliferum with dermatophytosis in one and nevus sebaceous with dermatophytosis in the other two cases. Although complete excision is the treatment of choice for these lesions, an antifungal agent is needed to eradicate the concurrent superficial mycosis. A careful histopathological examination of the lesional skin helps in identifying such unexpected dual lesions that would need further treatment.
Congenital Intranasal Glioma
Sajad Ahmad Salati,Ajaz Ahmad Rather
Case Reports in Surgery , 2011, DOI: 10.1155/2011/175209
Abstract: Congenital midline swellings of nose are encountered rarely, and nasal gliomas constitute about 5% of such lesions. Various theories have been suggested to explain the pathogenesis. Imaging preferably by MRI is mandated to study the extent and to rule out intracranial extension. Treatment is complete excision, and the approach depends upon the extent of the lesion and availability of expertise. We present the management of one such case of congenital intranasal glioma without any intracranial extension that presented as a septal polyp.
A novel approach to nose-tip and eye corners detection using H-K Curvature Analysis in case of 3D images  [PDF]
Parama Bagchi,Debotosh Bhattacharjee,Mita Nasipuri,Dipak Kumar Basu
Computer Science , 2013,
Abstract: In this paper we present a novel method that combines a HK curvature-based approach for three-dimensional (3D) face detection in different poses (X-axis, Y-axis and Z-axis). Salient face features, such as the eyes and nose, are detected through an analysis of the curvature of the entire facial surface. All the experiments have been performed on the FRAV3D Database. After applying the proposed algorithm to the 3D facial surface we have obtained considerably good results i.e. on 752 3D face images our method detected the eye corners for 543 face images, thus giving a 72.20% of eye corners detection and 743 face images for nose-tip detection thus giving a 98.80% of good nose tip localization
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