[S1 Clinical guideline"adenoids and adenoidectomy"]. / S1-Leitlinie "Adenoide Vegetationen/Rachenmandelhyperplasie".

On behalf of the German Society of Oto-Rhino-Laryngology, Head and Neck Surgery, a clinical guideline for adenoids and adenoidectomy was developed in 5 consensus meetings after taking into consideration the current literature. This guideline was released by the presidium on 13 April 2011. Anatomy, pathology and pathophysiology, symptoms, diagnosis, therapy, and course are presented.

[Guideline: Treatment of obstructive sleep apnea in adults]. / Leitlinie: Therapie der obstruktiven Schlafapnoe des Erwachsenen.

The current guideline discusses conservative and surgical therapy of obstructive sleep apnea (OSA) in adults from the perspective of the ear, nose and throat specialist. The revised guideline was commissioned by the German Society of Ear-Nose-Throat, Head-Neck Surgery (DG HNO KHC) and compiled by the DG HNO KHC's Working Group on Sleep Medicine. The guideline was based on a formal consensus procedure according to the guidelines set out by the German Association of Scientific Medical Societies (AWMF) in the form of a"S2e guideline". Research of the literature available on the subject up to and including December 2008 forms the basis for the recommendations. Evaluation of the publications found was made according to the recommendations of the Oxford Centre for Evidence-Based Medicine (OCEBM). This yielded a recommendation grade, whereby grade A represents highly evidence-based studies and grade D those with a low evidence base.

[Classification of etiologic agents in fungal sinusitis by immunohistochemistry, histology and culture]. / Fungale SinusitidenErregerklassifizierung durch Immunhistologie, Histomorphologie und Kultur.

In the invasive forms of fungal sinusitis rapid identification of etiologic agent is of vital importance because of the different reaction of the fungi to various antifungal agents. In the non-invasive forms it is of interest for epidemiologic reasons and because of the potential transition to invasive and generalized mycoses in case of additional immunodeficiency. A diagnosis of fungal genus in histologic slides is desirable since up to 70% of the fungal cultures remain without result.In the present study 77 cases of fungal sinusitis were examined with the comercially available antibodies Anti-Aspergillus and Anti-Rhizomucor. The results of the histological examination and fungal cultures were added. The immunohistochemical examination permitted in 64 cases a classification as Aspergillus/Penicillium. Two cases caused by Zygomyzetes alone or in combination could be confirmed immunohistochemically. Four fungus balls showed no significant immunoreaction with both antibodies. If these where caused by other Hyphomycetes p.e. Pseudallescheria or if it where Aspergillus fungus balls that did not react because of extreme regressive change can not be decided.

[Investigations on allergic fungal genesis of chronic rhinosinusitis]. / Untersuchungen zur pilzallergischen Genese chronischer Rhinosinusitiden.

BACKGROUND: The incidence of allergic fungal sinusitis (AFS) is estimated differently. The importance of hyphal findings in nasal mucus for initiation of chronic hyperplastic sinusitis is not proven. METHODS: 124 patients with clinical signs and CT-scan findings of a chronic-hyperplastic rhinosinusitis were treated by functional endoscopic sinus surgery. During the operation a thick mucus was found in each patient. The mucus was isolated and investigated by histopathological analysis with special Grocott-stain and a culture for fungal growth was initiated. Furthermore the diagnostic for allergic reactions against fungus was done by prick- and RAST-tests. RESULTS: 21 patients had positive histopathological findings of fungus. In 10 cases fungal hyphae were found embedded in typical eosinophilic mucus. A positive allergic reaction against fungus was seen in 7 of these 10 patients. The culture results showed different pictures according to the isolated species, in 3 cases of the 10 AFS cases the culture was negative. The other 11 cases of 21 positive histological findings of fungus were cases of a fungus ball. The other 103 patients were without any sign for fungus in the HE- or Grocott-stain. CONCLUSIONS: A high incidence of AFS is not evident in group of chronic hyperplastic rhinosinusitis. The presence of eosinophilic "allergic" mucus is not the evidence for AFS. The inflammatory cascade leading to the clinical picture is a multifactorial event. The role of detectable fungus hyphae have to be estimated by further investigations.

Virtual endoscopy of the tympanic cavity based on high-resolution multislice computed tomographic data.

OBJECTIVE: This study was designed to assess the value of high-resolution multislice computed tomography (MSCT) data of the petrous bone for the virtual endoscopic visualization of the tympanic cavity. BACKGROUND: The recently introduced MSCT technology has improved spatial resolution in the z axis as well as scan speed in computed tomography. Three-dimensional rendering of high-resolution MSCT data of the petrous bone may be expected to provide endoluminal views of superior image quality, thus competing with transtympanic endoscopy (otoendoscopy). SETTING: This study was conducted at a university teaching hospital. MATERIALS AND METHODS: Cadaveric phantom studies in a MSCT scanner were performed to define a data acquisition protocol, combining adequate detail resolution with low tube current. Subsequently, the cadaveric phantom underwent otoendoscopy. The postprocessing parameters of the three-dimensional rendering protocol were chosen to produce views closely resembling the corresponding otoendoscopic images. High-resolution data from 18 patients with pathologic conditions of the middle ear, as suggested by clinical findings and assessment of cross-sectional data, were postprocessed using the volume rendering technique to generate standardized virtual endoscopic views. A total of 36 virtual endoscopic scans of the tympanic cavity were generated. RESULTS: With regard to intermediate and high-density structures, virtual endoscopic images, based on MSCT data, yielded endoluminal views closely resembling corresponding otoendoscopic views. Virtual endoscopy seems useful for imaging ossicular pathologic conditions such as dysplasia and chain disruption as well as for assessing patient status before and after otosurgery. CONCLUSION: MSCT data sets allow for generating virtual endoscopic views closely resembling otoendoscopic images. The technique is especially useful when ossicular pathologic changes are present as well as for preoperative and postoperative imaging of otologic procedures.

[Virtual rendering techniques in otologic imaging]. / Virtuelle Darstellungstechniken in der otologischen Bildgebung1.

UNLABELLED: Virtual postprocessing techniques combine the advantages of condensing the large amounts of data provided by high-resolution (HR) cross-sectional imaging modalities with those of three-dimensional (3D) imaging. The techniques and indications for virtual representations in imaging of the middle ear (ME), internal ear (IE), and cerebellopontine angle (CPA) are presented together with practical examples. MATERIAL AND METHODS: HR data sets acquired by computed tomography (CT) and magnetic resonance imaging (MRI) in patients with ME, IE, and CPA pathologies were transferred to a workstation via an internal network to generate endo- or extraluminal 3D views by means of the volume rendering technique (VRT). The source data were acquired using scanners and imaging protocols with the highest resolution available at present: a multislice spiral CT (MSCT) with a slice thickness of 0.5 mm and a reconstruction increment of 0.2 mm and a 3D CISS sequence with a slice thickness of 0.5 mm for MRI. RESULTS: Virtual endoscopy was superior to cross-sectional images for assessing ME pathologies like dysplasia, postoperative changes, and destructive bone processes with extensive soft-tissue involvement; fibrous obliterations of the internal ear and labyrinthine dysplasia were depicted with a superior image quality on 3D renderings compared to conventional reconstruction techniques. Virtual endoscopy of the CPA and external acoustic meatus (EAM) was helpful in detecting and visualizing neurovascular conflicts and in assigning small intrameatal tumors to components of the acousticofacial bundle. A common feature of all applications was that the large numbers of source images could be reduced to a few 3D reconstructions for documentation and optimized communication of the findings between the radiologist and otologist. CONCLUSION: Virtual rendering makes an important contribution towards establishing, presenting, and documenting the findings when certain otologic pathologies have to be assessed. It can be used for routine imaging and allows for more efficient handling of the large amounts of imaging data generated by high-resolution cross-sectional imaging modalities.

High-resolution petrous bone imaging using multi-slice computerized tomography.

Multi-slice computerized tomography (MSCT) is considered to provide superior image quality. We defined a data acquisition protocol for high-resolution (HR) temporal bone imaging using MSCT and assessed its impact on data acquisition and post-processing (PP). The data acquisition protocol was defined in cadaveric phantom studies performed by MSCT and subsequently applied to 38 patients referred for temporal bone assessment. The parameters image quality and diagnostic value of MSCT data were assessed for the cross-sectional source images as well as for 2-dimensional (2D) reformations and 3-dimensional (3D) reconstructions by 3 radiologists by comparison with incremental HR scans of 17 patients with suspected middle ear disorders. The data acquisition protocol yielded HR images with an excellent detail resolution and a comparable image quality of cross-sectional scans and related orthogonal reformations. MSCT achieved higher scores for image quality and diagnostic value (p < 0.001, t-test) than incremental HR CT with regard to both 2D and 3D reconstructions. MSCT improves the image quality of HR cross-sectional scans as well as that of 2D and 3D PP techniques in petrous bone imaging. The radiation exposure of the eye lenses is increased by MSCT as gantry angulation is not yet possible in the helical scan mode.

Use of cartilage grafts in the treatment of laryngotracheal stenoses and defects in children.

Stenosis of the laryngotracheal section is in most cases a sequel of intensive care treatment. Most of the children presenting with such stenoses need tracheostomy that in consequence impedes their physical, social and language development. Surgical treatment of stenosis and closure of tracheostomy as early as possible should be strived for. Reconstructive techniques using autogenous cartilage grafts have proved very effective. The aim of our study was to examine the influence of different methods on the structure and function of reconstructed airways. In 23 children between 2 and 16 years suffering from laryngotracheal stenosis we reconstructed the stenotic segments by insertion of autogenous cartilage grafts. Enlargement was achieved by cartilage implantation as a stent into the split cricoid plate in 16 children; in 3 cases we performed enlargement of the anterior wall and in 5 cases instable lateral walls of the trachea had to be reinforced. One child had to be treated with all three techniques at once. In another case the overstretched and soft posterior tracheal wall had to be stabilized. Enlargement of the cricoid plate has proved excellent in cases of a high degree of stenosis of the posterior commissure (Type III and IV of the Cotton classification). Subglottic stenoses Type II can be treated with anterior insertion of cartilage. The use of cartilage in surgical treatment of laryngotracheal stenosis in childhood leads to safe and sufficiently satisfactory results that do not hamper further development of either larynx or trachea.

Endotracheal balloon dilatation and stent implantation in benign stenoses.

BACKGROUND: Tracheal reconstruction is the treatment of choice in nontumorous tracheal stenoses, but recurrences and concomitant medical conditions limit this approach. We investigated the outcome after balloon dilatation and silicone stent implantation. METHODS: Forty-two patients with inoperable tracheal stenoses underwent balloon dilatation and afterward silicone stent implantation. Patients were divided into two groups, in group A 24 patients received tracheal stents as a temporary treatment. In group B, definitive stenting was done in 18 patients with severe concomitant medical conditions that did not allow for stent removal. RESULTS: Immediate results were satisfactory in all patients. In group A, stents could be removed in 12 patients after a mean interval of 20 months. Restenting was not required during the following 18.9 months. Twelve patients are still waiting for stent removal after a mean follow-up of 20 months. In group B, mean follow-up is now 48.4 months. Complications included retained secretions, dislocation, and granuloma formation. CONCLUSIONS: Stenting after balloon dilatation is safe and effective in benign tracheal stenoses. After temporary use, stents can be removed when local and general conditions permit. In all other patients, stenting proved beneficial for 5 years as more definitive treatment.

A post-processing protocol for three-dimensional visualization of the inner ear using the volume-rendering technique based on a standard magnetic resonance imaging protocol.

A superior diagnostic quality compared to other post-processing (PP) techniques for three-dimensional (3D) inner ear imaging has been attributed to volume rendering (VR). We defined and assessed a VR protocol for 3D visualization of the inner ear in a routine imaging setting. Following definition of a VR protocol by using lower threshold values, surface shading, perspective views and related parameters, standardized 3D views of the inner ear were generated and evaluated in 32 patients suffering from sensorineural or combined hearing loss. Comprehensive inner ear visualization was achieved in 28 patients by means of two 3D shaded-surface views. Incomplete data acquisition (1/32), motion and pulsation artefacts (2/32) and interposed fluid-retaining mastoid cells (1/32) were responsible for non-diagnostic image quality in 4/32 patients. In 5/32 patients modifications of the PP protocol involving the threshold value and depth-cueing parameters helped to establish diagnostic image quality. Mean post-processing time amounted to 5.8 min per site. 3D imaging with the VR technique is suitable for routine inner ear assessment if direct VR, predefined PP protocols and standardized labyrinthine views are used.

[Middle ear adenoma. Long-term course of a rare neoplasm]. / Das Mittelohradenom. Langzeitverlauf einer seltenen Neoplasie.

Adenomas of the middle ear are rare benign glandular neoplasms arising from the middle ear mucosa. After previous operations 25 and 15 years before, a 67-year-old female complained about dizziness, tinnitus, and unilateral hearing loss on the left side. A tumor in the tympanum that was revealed by otoscopy could be removed completely. Histological examinations showed an adenoma of the middle ear with cholesteatoma. This was inconsistent with the histological result of the operation in 1983, which had described a hidradenoma. An exact analysis of the preparations confirmed that a middle ear adenoma had already been present in 1983. Hidradenoma is one of the most important differential diagnoses. The characteristic histological sign of middle ear adenomas in contrast to hidradenomas is the lack of myoepithelial cells. In addition, it is very difficult to differentiate middle ear adenoma and adenocarcinoma using histopathological and clinical methods. Therefore, thorough follow-up is mandatory for patients after surgical treatment of middle ear adenomas.

[Endotracheal silicon stents in therapy management of benign tracheal stenoses]. / Endotracheale Silikonstents im Therapiemanagement benigner Trachealstenosen. Ergebnisse nach 5-jähriger Anwendung.

BACKGROUND: Advances in endoscopic technique and the development of new materials have made stenting an interesting alternative to surgical treatment for extended tracheal stenoses. This 5 years' retrospective study describes long term results of silicon stents in patients with benign chronic tracheal stenoses. PATIENTS AND METHODS: 45 adult patients (mean age: 45 years) had endotracheal Dumon (Endoxane) stent placement as surgical therapy was not indicated. Fiberoptic controls were performed every 3-6 months. RESULTS: In 42 patients therapy proved successful with improved ventilation and high level of tolerance. Acut stent-removal was necessary in 2 patients because of edema of the vocal cords, in 1 patient because of stent independent paralysis of both recurrents nerves. Further complications included migration (16.6%), granuloma formation (33.3%) and airway obstruction due to heavy secretion (2.3%). CONCLUSIONS: Long term results have shown that this technique is associated with high efficiency and infrequent complications which are not life-threatening. Advantages consist in a minor-invasive technique with small expenditure of time.

[Virtual otoscopy--technique, indications and initial experiences with multislice spiral CT]. / Virtuelle Otoskopie--Technik, Indikationen und erste Erfahrungen mit dem Mehrschicht-Spiral-CT.

UNLABELLED: We report the standardized postprocessing of high-resolution CT data acquired by incremental CT and multi-slice CT in patients with suspected middle ear disorders to generate three-dimensional endoluminal views known as virtual otoscopy. MATERIALS AND METHODS: Subsequent to the definition of a postprocessing protocol, standardized endoluminal views of the middle ear were generated according to their otological relevance. The HRCT data sets of 26 ENT patients were transferred to a workstation and postprocessed to 52 virtual otoscopies. RESULTS: Generation of predefined endoluminal views from the HRCT data sets was possible in all patients. Virtual endoscopic views added meaningful information to the primary cross-sectional data in patients suffering from ossicular pathology, having contraindications for invasive tympanic endoscopy or being assessed for surgery of the tympanic cavity. Multi slice CT improved the visualization of subtle anatomic details such as the stapes suprastructure and reduced the scanning time. CONCLUSION: Virtual endoscopy allows for the non invasive endoluminal visualization of various tympanic lesions. Use of the multi-slice CT technique reduces the scanning time and improves image quality in terms of detail resolution.

[Long-term results after modified Réthi-plasty in childhood]. / Langzeitergebnisse nach modifizierter Réthi-Plastik im Kindesalter.

BACKGROUND: Laminotomy as described by Réthi has proved useful in the treatment of laryngotracheal stenoses. Using this technique in children poses the question as to whether it interferes with the growth of the larynx and trachea. The aim of our study was to verify the influence of this operative procedure on the structure and function of the restored airway. PATIENTS: Fifteen children between the ages of 2 and 16 with severe laryngotracheal stenoses (Cotton Grade III and IV) underwent reconstruction with interposition of a piece of costal cartilage in the posterior cricoid plate. Indications for this procedure included the presence of severe circumferential subglottic stenosis in combination with stenosis of the posterior glottis (8 children) and complete atresia (4 children). RESULTS: In endoscopic follow-up examinations (2-12 years follow-up), complete epithelization with light stenosis in the subglottis was demonstrated in all cases. Airway ventilation tests showed a slight or moderate central obstruction in nearly all cases. No disturbance of growth of the larynx was noted. CONCLUSIONS: This technique is a safe and successful method for repairing severe subglottic stenoses in children. Although there are some structural and functional problems during the long term follow-up, this is not considered a significant disadvantage.

[Nasal splint--space holder for after-care in endoscopic paranasal sinus operations]. / Nasensplint--Platzhalter für die Nachbehandlung nach endoskopischen NNH-Operationen.

BACKGROUND: Scars and synechiae in the middle meatus of the nose are dreaded late complications of endoscopic sinus surgery. The placement of a stent into the ethmoidal sinus for ventilation and drainage during and after the wound healing in the nose and the sinuses seems to be advantageous. METHOD: A nasal splint (Nasensplint, Primed, Halberstadt) made of silicone, consisting of an oval shaped plate and a lateral groove with an attached strap is presented. A part of the groove should be placed in the middle meatus of the nose. The plate also acts as a stent after septal surgery. Up to now the nasal splint was placed in 32 patients after endoscopic sinus surgery and were left in place for 5-14 days. RESULTS: All patients tolerated the stents. No side effects or complications were observed. In the postoperative controls (2-12 weeks) no synechiae were observed. CONCLUSION: The nasal splint presented here seems to be a useful solution for problems in postoperative wound healing after endoscopic sinus surgery. It can help to avoid fibrin bridges between corresponding wound surfaces.

Virtual endoscopy of the nose and paranasal sinuses.

The purpose of this study was to evaluate the applicability of virtual endoscopy (VE) in the region of the nose and paranasal sinuses on the basis of volume-rendered spiral CT data. Forty-five patients underwent a low-dose spiral CT of the sinuses. The data were transferred to a workstation running software for volume rendering (EasyVision, Philips Medical Systems, Eindhoven, The Netherlands). Six orthogonal views of the maxillary sinuses and the nasopharynx and a fly-through movie of the nose were calculated. Two radiologists evaluated the coronal reconstructions and virtual endoscopy with respect to detectability of pathology using a checklist comprising 10 points. In 30 patients who underwent subsequent endoscopic surgery, surgeons were asked to rank the degree of assistance of the preoperative virtual endoscopy. In general, virtual endoscopy was possible in all 45 patients. The mean time required for path definition and movie calculation for virtual endoscopy were 8 (+/- 2) min and 3 (+/- 1) min, respectively. Overall, more anatomical details were depicted on coronal reconstructions; however, a high degree of similarity between virtual endoscopy and the intraoperative impression was reported by the surgeons. We conclude that virtual endoscopy of the nose and paranasal sinuses may develop into a standard means to guide surgeons during endoscopic interventions.

[Elevatorium for fractures of the nasal bone and zygomatic arch]. / Elevatorium für Frakturen des Os nasale und des Arcus zygomaticus.

BACKGROUND: Unsuitable instruments are often used for the reduction of nasal fractures and fractures of the zygomatic arc. A new instrument for elevation and reduction of these common fractures is presented. METHOD: The special shape of the elevator, which is adapted to the anatomy of the nasal dome, is helpful in nasal surgery. The bayonet-shaped angle also allows elevation of compressed fragments of the zygomatic arc. RESULTS: This instrument was successfully used in the reduction of 107 bony fractures of the nose and 36 fractures of the zygomatic arc. CONCLUSION: From the clinical point of view the elevator can be recommended for ENT specialist working in a trauma setting.

[Improving the design of an alloplastic epithelialized tracheal prosthesis]. / Untersuchungen zur Verbesserung des Designs eines alloplastischen epithelisierten Tracheaersatzes.

Replacement of the tracheal conduit remains an unresolved problem. The microporous material expanded polytetrafluorethylene (ePTFE) is suitable for tracheal reconstruction. The aim of our study was to improve the limited mechanical properties of this material by incorporating reinforcement elements and to examine the influence of these elements on host incorporation and epithelialization. In so dours ePTFE prostheses were reinforced with lonomer cement and porous high density polyethylene (pHDPE) rings and implanted into the neck muscle of miniature pigs. One of these prostheses was epithelialized by a cell seeding technique and was thus placed into a tracheal defect. Results were examined grossly by endoscopy and than by light and scanning electron microscopy. The shapes of both types of prostheses showed a high stability. The reinforcement elements did not impair bioincorporation or the ability to epithelialize. In vivo interposition of an incorporated and epithelialized prosthesis to a host led to cell differentiation. The improved biomechanical properties of the prostheses waid and the reproducible formation of epitheliums are important advances in the solution of effectively correcting tracheal defects.

[Protracted course of polychondritis as the etiology of progressive nose deformity, subglottic tracheal stenosis and inner ear hearing loss]. / Protrahiert verlaufende Polychondritis als Ursache für progrediente Nasendeformität, subglottische Trachealstenose und Innenohrschwerhörigkeit.

BACKGROUND: Relapsing polychondritis is a rare recurring inflammatory disorder with variable clinical course. Its etiopathogenesis is unknown, but autoimmune mechanisms are likely to be involved. PATIENT: We present a case report of a 42-year-old woman with polychondritis manifested in very slowly progressing destruction of the nasal cartilage, additional subglottic tracheal stenosis, and increasing cochlear dysfunction. RESULT: We describe and document by a series of photographs the very protracted course of the disease in this patient from early youth until now. Clinical signs and differential diagnosis in polychondritis are discussed. CONCLUSION: An early diagnosis in slowly progressing cases like this has to be established in order to permit adequate use of glucocorticoids and/or immunosuppressive drugs, to check the progress of the disease and prevent potentially lethal complications.